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Thread: line plot Print statements

  1. #1
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    Default line plot Print statements

    Hello there

    I have been giving a assignment at school were i have to be able to say what i want to. like 2x+3 or something like that. i'm in the beginning of programming and just started a month ago.
    i have only mangede to make straigth slopes and straigth lines where i say they start from and end.

    my teacher want me to make a program that gonna look something likes this:
    java.jpg

    with is an sinus curve. what should i do to make something like that?

    Here is what i have been making. is there someone who can point me in the right direction?
    import java.util.*;
     
    public class Opgave4_ChristianSørensen{
    	public static void main (String [] args) {
    		System.out.println("	        y-aksen");
    		System.out.println("- - - - - - - - -   + + + + + + + + +");
    		System.out.println("9,8,7,6,5,4,3,2,1,0,1,2,3,4,5,6,7,8,9");
    		slope(0, 5);
    		slope(6, -7);
    		straight(5, -5);
    		System.out.println();
    		slope(5, -2);
     
     
    	}
     
    		public static void slope(int Start, int end) {
    			if (Start <= end) {
    				for (int i = Start; Start<= end; Start++){
    					if (Start == -9)
    						System.out.println("x                 |");
    					else if (Start == -8)
    						System.out.println("  x               |");
    					else if (Start == -7)
    						System.out.println("    x             |");
    					else if (Start == -6)
    						System.out.println("      x           |");
    					else if (Start == -5) 
    						System.out.println("        x         |");
    					else if (Start == -4) 
    						System.out.println("          x       |");
    					else if (Start == -3)
    						System.out.println("            x     |");
    					else if (Start == -2)
    						System.out.println("              x   |");
    					else if (Start == -1)
    						System.out.println("                x |");
    					else if (Start == 0)
    						System.out.println("                  x");
    					else if (Start == 1)
    						System.out.println("                  | x");
    					else if (Start == 2) 
    						System.out.println("                  |   x");
    					else if (Start == 3) 
    						System.out.println("                  |     x");
    					else if (Start == 4) 
    						System.out.println("                  |       x");
    					else if (Start == 5) 
    						System.out.println("                  |         x");
    					else if (Start == 6) 
    						System.out.println("                  |           x");
    					else if (Start == 7) 
    						System.out.println("                  |             x");
    					else if (Start == 8) 
    						System.out.println("                  |               x");
    					else if (Start == 9) 
    						System.out.println("                  |                 x");
    					else if (Start >=-9) 
    						System.out.println("\n \n \n number has to be bewteen -9 og 9");
    					else if (Start <=9)
    						System.out.println("\n \n \n number has to be bewteen -9 og 9");
    				}
    			}
    			else {
    			for (int i = Start; Start>= end; Start--){
    					if (Start == -9)
    						System.out.println("x                 |");
    					else if (Start == -8)
    						System.out.println("  x               |");
    					else if (Start == -7)
    						System.out.println("    x             |");
    					else if (Start == -6)
    						System.out.println("      x           |");
    					else if (Start == -5) 
    						System.out.println("        x         |");
    					else if (Start == -4) 
    						System.out.println("          x       |");
    					else if (Start == -3)
    						System.out.println("            x     |");
    					else if (Start == -2)
    						System.out.println("              x   |");
    					else if (Start == -1)
    						System.out.println("                x |");
    					else if (Start == 0)
    						System.out.println("                  x");
    					else if (Start == 1)
    						System.out.println("                  | x");
    					else if (Start == 2) 
    						System.out.println("                  |   x");
    					else if (Start == 3) 
    						System.out.println("                  |     x");
    					else if (Start == 4) 
    						System.out.println("                  |       x");
    					else if (Start == 5) 
    						System.out.println("                  |         x");
    					else if (Start == 6) 
    						System.out.println("                  |           x");
    					else if (Start == 7) 
    						System.out.println("                  |             x");
    					else if (Start == 8) 
    						System.out.println("                  |               x");
    					else if (Start == 9) 
    						System.out.println("                  |                 x");
    					else if (Start >=-9) 
    						System.out.println("\n \n \n number has to be bewteen -9 og 9");
    					else if (Start <=9)
    						System.out.println("\n \n \n number has to be bewteen -9 og 9");
    			}
    			}
     
     
     
    		}
    			public static void straight (int Start, int end){
    					if (Start < end){
    						for (int i = -9; i<= Start; i++){
    									System.out.print(" ");
    								if (Start >=-9) 
    									System.out.print("\n \n \n number has to be bewteen -9 og 9");
    								else if (Start <=9)
    									System.out.print("\n \n \n number has to be bewteen -9 og 9");						
    						}
    						for (int i = Start; Start<=end; Start++){
    							if (Start <= end)
    								System.out.print(" x");
    						}
    					}
     
    					else {
    						if (Start > end){
    							for (int i = -9; i<= end; i++){
    										System.out.print(" ");
    									if (Start <=-9) 
    										System.out.print("\n \n \n number has to be bewteen -9 og 9");
    									else if (Start >=9)
    										System.out.print("\n \n \n number has to be bewteen -9 og 9");						
    							}
    							for (int i = end; end<=Start; end++){
    								if (end <= Start)
    									System.out.print(" x");
    							}
    						}
     
     
    					}
     
     
     
     
     
    			}
    }

    Hope someone can help me
    and thanks in advance


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: line plot Print statements

    Start with a piece of paper and draw the shapes. Find a trig function that will generate the x(columns) values as the y (row) values change. You will have to do some scaling (multiply by a factor) to get it to fit.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: line plot Print statements

    Quote Originally Posted by Norm View Post
    Start with a piece of paper and draw the shapes. Find a trig function that will generate the x(columns) values as the y (row) values change. You will have to do some scaling (multiply by a factor) to get it to fit.
    is it possible you could give me a hint with some code? because i'm still pretty lost :S

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: line plot Print statements

    Have you found the trig function that will draw the shape you want?
    I don't have any code that does that.

    Scaling means taking values in the range of 0 to 1 and converting them to some other range say 200 to 600 by multiplying then by (600-200) and adding 200.
    If you don't understand my answer, don't ignore it, ask a question.

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