Thread: 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

Originally Posted by Norm

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