I'm very new to the Math. Recent research from Cone Communications LLC, for example, indicated that 89 percent of surveyed Americans would switch brands to one associated with a good cause (given similar price and quality), and 87 percent would buy a product from a company advocating for. 2 and later, you can use the UIBezierPath class to create vector-based paths. The aim of this investigation was to lay the groundwork of the potential application of Pulsed Electric Fields (PEF) technology for accelerating the drying process of meat and meat products, and. Find the exact value of the following logarithms. Modeling and graphing using MATLAB was successful :). I'm at a very different place in my life now, compared to when I first started this blog, and, thankfully, compared to when I stopped writing. Come to Algebra-equation. The attached source code project draws spline curves between two points. Home; C# / C Sharp; 2D Graphics; Class Interface; Collections Data Structure; Components; Click on the form to draw. I have to design a windows application in Visual Basic which will get the points from the spreadsheet and draw best fit curves. Excel is a program that allows for curve fitting. h library will be discussed in details and samples programs will be provided to show the power of C programming language especially for graphic programming developing graphical user interfaces. , Please note that , , and are unknown coefficients while all and are given. h header file In this program, we will draw a bar graph on screen. Even if you don't have an airfoil plotting program, you can use a spreadsheet program like Microsoft Excel™ to scale the coordinates and plot them in the correct size (after fiddling around with scaling and distortion of the XY-graph). Decline curve analysis is the most currently method used available and sufficient . • The exponential function, Y=c*EXP(b*x), is useful for fitting some non-linear single-bulge data patterns. You can fit a curve or plot a function and get a report of the results in seconds. Hissein, and S. This method adds the given point to the current path, connected to the previous one by a cubic Bezier curve with the given control points. I can program them in, find the x,y,z coordinates, but I dont know how to graph them. - [Instructor] Alright, we are asked to choose the graph of the function. // Draw the curve. Curve fitting examines the relationship between one or more predictors (independent variables) and a response variable (dependent variable), with the goal of defining a "best fit" model of the relationship. Draw a (yellow) circle and a fixed point P on the circle line. The horns of many bovids such as gazelles have growth programs are similar to that of seashells. Logistic growth curves decrease before they increase. Program in c to print 1 to 100 without using loop 13. R = exprnd(mu) generates random numbers from the exponential distribution with mean parameter mu. Easy Tutor author of Program to draw a C-Curve of nth order is from United States. A NURB surface uniquely defines every square inch of a rectangular-like spline membrane. The usual methods of non linear regression requires a guess of the parameters and iterative computation. The attached source code project draws spline curves between two points. #include
0 or decay rate when r<0, in percent. Draw a (yellow) circle and a fixed point P on the circle line. I'm at a very different place in my life now, compared to when I first started this blog, and, thankfully, compared to when I stopped writing. Just as B jarne S troustupÕs first version of C + + w as im plem ented on top of a C language base, this reader began its life as E ric R obertsÕs. This reflects the graph about the line y=x. Working: First the computer reads the value of ‘x’ and ‘n’ from the user. Sketch a picture of a normal distribution. com, a free online graphing calculator. This would be the contour, but this is the gesture. Net Library and I'm having problems trying to do curve-fitting based on an exponential function. Program to sort given element using Heap Sort in C Program to sort given element using Quick Sort in Program to implement Ellipse Generating algorithm Program to implement flood Fill algorithm in C; Program to implement Boundary Fill algorithm in C; C Program for Bresenham's circle drawing algorithm C program for drawing a circle. In order to master the techniques explained here it is vital that you undertake plenty of. The first of these are as easy to draw as they are easy to make a computer draw. What you can do is create your range for the x-values. In fact, when I draw solid shapes with a curved edge, I use vertical lines if the curve is a function of x. Exponential distribution Random number distribution that produces floating-point values according to an exponential distribution , which is described by the following probability density function : This distribution produces random numbers where each value represents the interval between two random events that are independent but statistically. Write a C/C++ program (USING OpenGL) to implement DDA algorithm for line generation. Where to find them. So for drawing curve of ( X L – X C), firstly draw the graph of ( -X C) which is shown by curve b and then draw a curve for net reactance which is shown as curve c. So i've been playing with equation driven curves etc but can't figure out a elegant way to create an exponential curve which follows a path. 2020725942 ≈ 0. /*this is what i have so far. When I try to create the histogram in a similar way to superimp. We will use putpixel functions of graphics. If the function is y=A*exp(k*x)+C, this is more difficult. We write the requested level curves explicitly:. You can try to draw a set of real numbers by drawing the number line and coloring the points belonging to that set red, or by marking them in some other way. 5 Using Excel to find best-fit curves. Students have seen general forms of various types of equations. ) This program will generate the curve and save it to your hard drive. practice: exponential functions [196 marks] 1a. The direct labor required for the nth unit, , is k n = k 1n b k n n +. As these global and domestic litigation costs continue to rise, companies are under increased pressure to simultaneously reduce operating costs. In statistics and probability theory, the Gaussian distribution is a continuous distribution that gives a good description of data that cluster around a mean. The attached source code project draws spline curves between two points. Drawing a Member of the Family of Normal Curves. Calculate things online with just mouse moves. As these global and domestic litigation costs continue to rise, companies are under increased pressure to simultaneously reduce operating costs. We can solve the equation as follows: 2 3 x = 64. I want to know if I can draw exponential function curve in the CST curve creation , because I want to know how I can get the planar metal with exponential function bounding in the vivaldi antenna simulation. NET, Delphi, Excel, Access, VBScript, VBA enabled applications or any other development environment that supports COM. In fact, when I draw solid shapes with a curved edge, I use vertical lines if the curve is a function of x. Note that the curve passes through `(0, 1)` (on the y-axis). Classle-Social learning with online courses & books. For exponential, logarithmic and power trend fits, Excel uses the least square method on the data pairs [x, ln(y)] (in the exponential case). c - The vertical asymptote is given by the zero of the denominator x = 1. This graph is typical for exponential functions when a > 1. 3 Get and Change Existing Linear Fit Operation; 1. Repeat on opposite side. m 2 nA 6l Hld qrGilgCh atxs C 8rQeGsGejrRv reXdJ. 35*tan(30)} it is more accurate than 0. Differential Calculus - Solved Problem Set I - Common Exponential, Log , trigonometric and polynomial functions - Examples and solved problems - differentiation of common algebraic, exponential, logarithmic, trigonometric and polynomial functions and terms; problems related to differentiability. GCSE (1 – 9) Trig and Exponential Graphs Name: _____ Instructions • Use black ink or ball-point pen. com, a free online graphing calculator. Here: This program calls the Math. The distribution is called "memoryless," meaning that the calculated reliability for say, a 10 hour mission, is the same for a subsequent 10 hour mission, given that the. Logarithmic Graphs: Once you know the shape of a logarithmic graph , you can shift it vertically or horizontally, stretch it, shrink it, reflect it, check answers with it, and most important interpret the graph. and inverse c. Write A Menu Driven C Program To Draw 1)bezier Curve 2)bspline Curve And 3)cubic Spline Curve Question: Write A Menu Driven C Program To Draw 1)bezier Curve 2)bspline Curve And 3)cubic Spline Curve For N Control Points. Excel is a program that allows for curve fitting. can anyone please help me. To run the project, download and unzip the attached file, build and run the project and click on the form. h functions can be used to draw different shapes, display text in different fonts, change colors and many more. Exponential distribution Random number distribution that produces floating-point values according to an exponential distribution , which is described by the following probability density function : This distribution produces random numbers where each value represents the interval between two random events that are independent but statistically. fitobject = fit(x,y,fitType,Name,Value) creates a fit to the data using the library model fitType with additional options specified by one or more Name,Value pair arguments. CurveExpert Professional is a cross-platform solution for curve fitting and data analysis. Let's work through. The degree of the numerator is 1 and the degree of the denominator is 1. Next, from the menu, select CAD> Draw Line and click to begin by drawing CAD Line 1, starting from the bottom of the screen and dragging upwards. Each method produces a different type of curve, so pick whichever suits your application. NLREG determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. Range of y (y min to y max) is optional; if not specified, the function-grapher engine tries to evaluate it for the specified x range. In addition, after these curves have been drawn, I should be able to move any of these points with the mouse and see how the Bezier curve changes. It is presented as an introductory to advance course but can be used as a reference book. Im hoping that I can get help on a really stubborn problem that Ive been having lately. Now let’s t an exponential function to these same data, and overlay that regression as well. Population Data In the module Least Squares, we learned how to find the best fit of a straight line to a set of data points. For even more curved arrow options, check the curved arrows in the Block Arrows section. The following is a series of examples that show how to do this. highest test score achieved and the lowest test score achieved. h header file In this program, we will draw a horizontal sine wave on screen of amplitude 50 pixels. For negative `x`-values, the graph gets very close to the `x`-axis, but doesn't touch it. The calculation method used by exponential averages is cumulative, meaning that all previous bars have some effect on the EMA value, although that effect diminishes greatly with time. Curve fitting to get gamma curve parameter. The reality of exponential smoothing is far less dramatic and far less traumatic. You can try digitizing the data (getting a set of x,y coordinates corresponding to the curve) and then fitting a function to the data in Excel or any other data analysis program/library. Once the curve has been fitted you may predict values of y = f(x) for given values of x. If you want to see the code snippets included in this tutorial in action, you can try to click on some of the images. Say that we wished to add a vertical line at 2. Im hoping that I can get help on a really stubborn problem that Ive been having lately. Notes: You can change the look of your circle or curve by adding a shape fill or shape effect or changing the shape border. Program to draw a C-Curve of nth order; Program to draw a K-Curve of nth order; Program to draw a 3D Bezier Surface for MxN control points; Program of Fitting a Straight line, Exponential curve, Geometric curve, Hyperbola, Polynomial; Program to convert radiance to degree; DEGREES Function; Prolog program to find the nth element of a list. we need to first create a grid of points within the domain using the function meshgrid. There are an infinite number of generic forms we could choose from for almost any shape we want. 2020725942 ≈ 0. One of the great advantages of having statistical software like R available, even for a course in statistical theory, is the ability to simulate samples from various probability distributions and statistical models. It should be noted that the examples in the graphs were meant to illustrate a point and that the functions graphed were not necessarily unwieldy on a linearly scales set of axes. Excel is a good utility program for data recording and plotting, and is actually used a lot by. Decline curve analysis is the most currently method used available and sufficient . The marginal cost curve in fig. Both axes of this graph are in units of the input data set: The interpretation of the Q-Q plot is similar to the P-P plot: if the distribution you are testing is the correct model, the graph points will lie on an approximately straight line. (Exponential) In the C Programming Language, the exp function returns e raised to the power of x. Matlab has two functions, polyfit and polyval, which can quickly and easily fit a set of data points with a polynomial. 7 and above (Lion to Sierra), and Linux. If the function to be fitted is y=A*exp(k*x), then a classical linear regression applied to ln(y)=c+k*x directly leads to the goal. How to convert string to int without using library functions in c 12. These functions can be accessed from the Nonlinear Curve Fit tool. When it comes to plotting curves in the C language, you need to dust off your trigonometry. • In Excel, you can create an XY (Scatter) chart and add a best-fit “trendline” based on the exponential function. It will calculate any one of the values from the other three in the exponential growth model equation. Alternatively, click Curve Fitting on the Apps tab. • Problem: Regarding the fitted curve for Excel's Exponential Trendline,. NET HowTo: Draw a fractal that is generated by applying rules to prime numbers in Visual Basic 6. Using this same model for the exponential growth of the frogs, what will be the frog population in 7) 10 years 8) 50 years 9) A type of bacteria has a very high exponential growth rate at 80% every hour. Drawing tables in C I am sorry to bother folk with such an apparently simple query but I am afraid I can't suss it out. and call the function *back into main. "Discover the properties of Exponential Graphs and pit your wits against the computer with some fun games"Exponential functions are incredibly useful. To find the curve of best fit, you will need to do exponential regression. The program accepts the wavelengths, element name, and log(gf) values to calculate abundances in this curve of growth. matlab_mistake, programs which illustrate some simple but devious programming mistakes in MATLAB. The second is that in its most general form y = a ·exp ( b·x )+ c, an exponential function going through two points can have various shapes. 5 Using Excel to find best-fit curves. Here, the Lines and Curves page of the scatter plot properties is shown: For example, you may want to show how well your data points adapt to a certain polynomial curve fit or to a logistic regression curve fit. The example is ported from C examples in the OpenGL. In order to master the techniques explained here it is vital that you undertake plenty of. You can now start the Autodesk software and run the eq. Exp method and then calls the Math. Software Design Using C++ Simple Graphics If we use a Win32 application instead of a console application, we can draw some simple graphics in a window on the screen. Here, we provide lessons, guides, and links on how to take advantage of this finely defined programming environment. this version of the program is intended as a starting point for a parallel approach. h header file. k Worksheet by Kuta Software LLC Kuta Software - Infinite Algebra 2 Name_____ Graphing Exponential Functions Date_____ Period____. This post is about plotting various probability distribution functions with the statistical programming language R with the ggplot2 package. In this Rhino tutorial we cover how to make an exponential curve with with Explicit History (Grasshopper). plot(log(abm), xlab="Log10 (Number of sites occupied)", ylab="(Log10) Mean local abundance", xlim=c(0,4),pch=20) Which looks like this: Now I want to plot an exponential curve through this data. Can anyone please help me how to start this project, what libraries I might use and what things to keep in mind. The x and y parameters in bezierCurveTo() method are the coordinates of the end point. Given a particular equation, you need be able to draw a quick sketch of its curve showing the main details (such as where the curve crosses the axes). LEVEL CURVES/CONTOUR MAPS. The first time most project managers become aware of the existence of S-curves is when they are requested by the client or senior management to include one in their next progress report. The online curve plotting software, also known as a graph plotter, is an online curve plotter that allows you to plot functions online. If they data are already in wide format, then the first step illustrated below with the VARSTOCASEScommand is not needed. Code example Edit. The FAQ contains a minimal example on how to turn the code into a program that produces the desired output. Explanation for the above result:. Data can be entered in two different formats:. For more information about fitting curves in the Curve Fitting app, see Interactive Curve and Surface Fitting. Constructing Tangent Lines to Curves. And this is the Ceiling Function: The Ceiling Function. I want to draw the exponential curve that fits the peaks of the damped signal. (Transitions between the growth phases can be rounded out. Computer programs that draw the graph of the tangent function considered as circular functions. From a graphical point-of view, it is an infinite spring, whose distance between adjacent coils reflects the frequency of the complex exponential: If you have a 1D time x-axis, you may be used to draw functions along a single 2nd y-axis dimension: sines, cosines, etc. Use the plot function in Matlab. If one wishes to draw rotated or skewed figures under Windows NT, one can use World Transforms but they are unfortunately not available under Windows 95/98. Nonlinear curve fitting is an iterative process that may converge to find a best possible solution. Let X = the amount of money a student in your class has in his or her pocket or purse. Symbolic Math in Matlab. • Diagrams are NOT accurately drawn, unless otherwise indicated. Press “Ctrl” while dragging the mouse to draw a horizontal or vertical line. This curve fit cannot fit negative data or data equal to zero. The program will work in Turbo C or Turbo C++ compiler as it uses graphics. For negative `x`-values, the graph gets very close to the `x`-axis, but doesn't touch it. Draw Function Plots Description. The Best Demo on C++ STL and its Power: sets, vectors, pairs, maps, upper_bounds, and MORE - Duration: 43:48. Perhaps your program requires the graphic presentation of any 2D math expression. Use polyfit with three outputs to fit a 5th-degree polynomial using centering and scaling, which improves the numerical properties of the problem. How can I fit an exponential curve of the form y = A. Plot the points and draw a smooth curve. For a cross-platform solution, one. And the function is f(x) is equal to two, times three to the x and we have three choices here. Use this page to generate a scatter diagram for a set of data: Enter the x and y data in the text box above. In mathematical equations you will encounter in this course, there will be a dependent variable and an independent variable. But obviously, if you go to 5 to the positive billionth power, you're going to get to a super huge number because this thing is just going to keep skyrocketing up like that. It doesn't know the coordinates of the points on the curve so it can't tell if the point you click is close to the curve. Image, sp image. How to plot a exponential function in matlab by writing programming Programming in Visual Basic. C# - Nonlinear Curve Fitting - QuickStart Samples - Math, Statistics and Matrix Libraries for. Here's a sampleprogram that draws a sine with the SetPixel() function (as Clockowl suggested):. We will always select the option to show the equation on the chart. So i've been playing with equation driven curves etc but can't figure out a elegant way to create an exponential curve which follows a path. PSlib is a C-library for generating multi page PostScript documents. A similar technique can be used for Exponential, Logarithmic, and Power function curve fitting in Excel as well. Make sure to change the path of BGI folder inside initgraph() function according to your system. c program of simpson's 3/8 rule. The method of least squares can be generalized to allow fitting more complex functions to data. An interesting example of the use of transformation to convert a non-linear relationship into a form that is amenable to polynomial curve fitting is the use of the natural log (ln) transformation to convert a positive Gaussian peak, which has the fundamental functional form exp(-x 2), into a parabola of the form -x 2, which can be fit with a. scr script using the SCRIPT command. Constructing Tangent Lines to Curves. This post goes over the process of how to draw a PPF (production possibilities frontier) or PPC (curve) given a table or opportunity costs. What's a radian? Glad you asked. Scatterplot is a graphical representation of statistical data to determine the relative strength of the variables. The most frequently used tools are listed on the left side of the software. It was part of the final assignments in the programming semester. Graphing an Exponential Function with a Vertical Shift An exponential function of the form f(x) = b x + k is an exponential function with a vertical shift. Exponential Distribution The exponential distribution is often used to model the reliability of electronic systems, which do not typically experience wearout type failures. In fact, writing a function to draw a curve is a lot easier than plotting a straight line. To determine final. If the function to be fitted is y=A*exp(k*x), then a classical linear regression applied to ln(y)=c+k*x directly leads to the goal. c program of Gauss-seidel method. Statistical software is becoming improved with regard to assessing beta, and recent and future advances will enable the analyst to avoid the use of Operational Characteristic Curves. Sep 8, 2015. A NURB surface uniquely defines every square inch of a rectangular-like spline membrane. In Part 6 we will look at some basic plotting syntax. Really, this just means we have a number greater than 1 getting raised to the x. It’s simple to understand, but difficult to put into practice when you’re actually drawing a human figure. Programming Abstractions in C++ Eric S. Is this a problem, then? Well, these conversion issues are the reason why DTP software and printers always favoured PostScript, i. The truth is, exponential smoothing is a very simple calculation that accomplishes a rather simple task. To create a Bézier path, follow these steps: Starting with a blank artboard, select the Pen tool. C Program to display mouse pointer in textmode. I am not really sure what you mean by 2nd order exponential fitting program. The Best Demo on C++ STL and its Power: sets, vectors, pairs, maps, upper_bounds, and MORE - Duration: 43:48. To draw an OC curve (or even to look one up in a book of curves), you need to know c and n. Exponential Moving Average - EMA: An exponential moving average (EMA) is a type of moving average that is similar to a simple moving average, except that more weight is given to the latest data. Here, we’ve dragged it out to the right to make a more sweeping curve. 2 we looked at useful mathematical models and formulas that we anticipate seeing repeatedly in the business environment. Programming Abstractions in C++ Eric S. WZGrapher can also be used to graph numerical solution curves of integrals, to solve numerically and graph ordinary differential equations up to the fifth order,. For editing purposes, it is usually represented on the screen by drawing a grid of lines on the surface called rows and columns. Press ENTER twice and the exponential regression program will be run. C program to draw Koch Curve using recursion #include #include I have also tried a C++ program for Koch curve and written it on my blog ,. Exponential distribution functions with online calculator and graphing tool. Press STAT, then right arrow to highlight CALC, and then press 0:ExpReg. We're going to experiment with three different methods to cope with our exponential regression. Donald Knuth describes a way to generate such values in §3. When the program gets to the first iteration it must draw straight lines. The usual methods of non linear regression requires a guess of the parameters and iterative computation. This is because you can make a curve that is exponential with respect to time with just a resistor and a capacitor. set_theory , a library which demonstrates various set theoretic operations using several models of a set. Forcing a line to be straight is a convenient way to deal with the imprecision of a mouse or tablet, and to take advantage of the power of a computer to make things look neat and orderly. You have to determine whether the time-complexity of this function is polynomial or exponential. The common link between the two sections is the exponential decline curve. Matlab has two functions, polyfit and polyval, which can quickly and easily fit a set of data points with a polynomial. So, pause this video and see if you can determine which of these three graphs actually is the graph of f(x). Powerful Graphing - Dead Simple FX Graph places the power of FX Draw's graphing tool into the hands of students. Download (or view and print) Exponential paper in *. To help with the visualization, we might choose to connect the dots. Let's draw a tangent line to the ellipse r(t)=<2 cos t, 3 sin t> at t = pi/4. If the function is y=A*exp(k*x)+C, this is more difficult. What you can do is create your range for the x-values. Open the ImageJ folder in the C drive and. How to make a Gaussian Curve in PowerPoint 2010 Draw a perfect Gaussian Curve from a function. example program, Sierpinski curve, space-filling curve, example, Windows Forms programming, fractal, Visual Basic. i need a complete C program to draw a sin curve without any application and the output should be displayed in dos prompt. McAfee believes capitalism will be sufficient to continue this trend and bring new, clean technologies to low-income countries—but to avoid the same pitfalls the West experienced, we must put pollution inside. 1 CS 536 Computer Graphics Bezier Curve Drawing Algorithms Week 2, Lecture 3 David Breen, William Regli and Maxim Peysakhov Department of Computer Science. Draw a smooth curve through the bars. How can i overlay an exponential distribution on a histogram of time intervals? The histogram looks like an exponential distribution. Exp is the exponential function. The best fitting curve has the least square error, i. ) This program will generate the curve and save it to your hard drive. An interesting example of the use of transformation to convert a non-linear relationship into a form that is amenable to polynomial curve fitting is the use of the natural log (ln) transformation to convert a positive Gaussian peak, which has the fundamental functional form exp(-x 2), into a parabola of the form -x 2, which can be fit with a. The loop structure should look like for(i=1; i<=rows; i++). Write a C program to draw a sphere in computer graphics? What if you were told to draw an object with curves for art what would you draw? This is a weird answer, but, maybe a lamp, a vase, a ball. What's a radian? Glad you asked. h library will be discussed in details and samples programs will be provided to show the power of C programming language especially for graphic programming developing graphical user interfaces. If you want to make a smooth looking curve with this set of points, you need to focus on what determines the slope of the curve. h header file to draw horizontal and vertical axis and bars on screen. Curve Fitting¶ One of the most important tasks in any experimental science is modeling data and determining how well some theoretical function describes experimental data. I am a noob at R and would appreciate any advice and help. This works well for all curves if no anti-aliasing is used (but leaves "stair steps" in the edge). With a point-and-click interface and tools for batch operations, Origin helps them optimize their daily workflow. But obviously, if you go to 5 to the positive billionth power, you're going to get to a super huge number because this thing is just going to keep skyrocketing up like that. i need a complete C program to draw a sin curve without any application and the output should be displayed in dos prompt. Calculus III Project. The first time most project managers become aware of the existence of S-curves is when they are requested by the client or senior management to include one in their next progress report. Lazy Nezumi Pro is a Windows app that helps you draw smooth, beautiful lines, with your mouse or pen tablet. Write a program in C to draw cosine wave using graphics. I have done this very crudely by plotting the x and y values of the peaks on the same figure as the damped signal, but is there a better way to do this, without having to search values manually on the graph. The size of R is the size of mu. py, which is not the most recent version. Steps to Creating a Basic Epidemic Curve Using Microsoft Excel 20 07. To help with the visualization, we might choose to connect the dots. Software Design Using C++ Simple Graphics If we use a Win32 application instead of a console application, we can draw some simple graphics in a window on the screen. Step 1a – Open a blank Microsoft Excel 2007© spreadsheet by selecting the Microsoft button (1) at the upper, left portion of the window and then from the General tab, select the Workbook icon (2). Curve fitting to get gamma curve parameter. To make the eyes, draw an oval shape with a slight tilt to the side at the top. Excel is a good utility program for data recording and plotting, and is actually used a lot by practicing engineers in industry. example program, Sierpinski curve, space-filling curve, example, Windows Forms programming, fractal, Visual Basic. Each individual curve has the same level of utility along the curves, and each curve expresses a higher level of utility the further away from. 18: Using a private font collection 38 Figure 5. ( planned and earned) Dynamic Summary Progress report. Repeat on opposite side. , One Roundhouse Plaza, Northhampton, MA 01060) is one of several software packages designed specifically for plotting and analyzing quantitative data. Check other upload for clarity. NET, Visual C#. A 1-d sigma should contain values of standard deviations of errors in ydata. How would I go about graphing them? Is there some predefined graphics library that I can use or is it more complicated than that. A curve with exact starting angle (60°) and ending angle (180°) is enough here.