A trigonometric plot
CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com
Results 1 to 3 of 3

Thread: A trigonometric plot

  1. #1
    Join Date
    Feb 2011
    Posts
    8

    A trigonometric plot

    Heya, I've tried to make a program that plots a sinus curve.
    The user is asked what width and scale he wants the plot to be.
    The problem is that the scale is messed up and I would appreciate if someone could help me out
    Code:
    public class Trigonometry {
    
    	public static void main(String[] args) {
    
    		double[] sinusarray = { 0.3, 0.7, 1, 1.3, 1.6, 1.9, 2.2, 2.5, 2.8, 3.1,
    				3.4, 3.7, 4, 4.3, 4.6, 4.9, 5.2, 5.5, 5.8, 6.1 };
    		sinus(sinusarray);
    		System.out.print("scale: ");
    		double scale = Keyboard.readDouble();
    
    		System.out.print("width: ");
    		double width = Keyboard.readDouble();
    
    		plotFunctionstable(sinusarray, scale, width);
    	}
    
    	static void sinus(double[] array) {
    		for (int i = 0; i < array.length; i++) {
    			array[i] = Math.sin(array[i]) / array[i]; //
    
    		}
    
    	}
    
    	static void plotFunctionstable(double[] array, double width, double scale) {
    		for (int i = 0; i < array.length; i++) {
    			double blanksteg = scale * (width + array[i]);
    
    			for (int j = 0; j < blanksteg; j++) {
    				System.out.print(' ');
    			}
    			System.out.println('*');
    
    		}
    	}
    }
    Last edited by Bertil; August 24th, 2011 at 02:06 PM.

  2. #2
    Join Date
    Aug 2011
    Posts
    10

    Re: A trigonometric plot

    It seems to "work" in some sense.

    Hard to tell without having a more clear idea of what you are trying to accomplish.

    But this expression doesn't look exactly right to me: scale * (width + array[i])

  3. #3
    Join Date
    Aug 2011
    Posts
    10

    Re: A trigonometric plot

    P.S. "sinus curve"?
    This is the first time I've heard anyone use that word related to sin functions.

    This is a sinus: http://www.krystalplonski.com/wp-con...sal-cavity.jpg

    sinusoid and sinusoidal are more typically used.

    (Sure; "sinus" is the original Latin word, but one doesn't usually expect Latin in that context. ;-)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Windows Mobile Development Center


Click Here to Expand Forum to Full Width

This is a CodeGuru survey question.


Featured


HTML5 Development Center