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Thread: <b>TRIGONOMETRIC FUNCTION GRAPHING</b>

  1. #1
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    Default <b>TRIGONOMETRIC FUNCTION GRAPHING</b>

    <h3>Please help me to program a code that will plot (graph) COMPLEX TRIGONOMETRIC FUNCTIONS recognizing the input from the user as string


  2. #2
    Super Moderator curmudgeon's Avatar
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    Default Re: <b>TRIGONOMETRIC FUNCTION GRAPHING</b>

    You first.

    Please show us what you've tried and what problems you may be having with it.

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    Super Moderator jps's Avatar
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    Default Re: <b>TRIGONOMETRIC FUNCTION GRAPHING</b>

    Please help me
    Sure thing. What do you need help with?
    Generally speaking if you need help, then you have a problem to solve. What is the problem and what is your problem with the problem?

  4. #4
    Super Moderator curmudgeon's Avatar
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    Default Re: <b>TRIGONOMETRIC FUNCTION GRAPHING</b>

    I'm deleting your second thread. Please do not ask folks here to "mail me" a solution. This is not a "do my homework for me site".

    --- Update ---

    I have received this private message from the original poster which for his benefit I am posting here:

    i m new for java,my java skill is not that good and this is all i've done yet,and no idea what to do next

    import java.util.Scanner;
    import java.util.Stack;
     
     class Tokenizer {
      private String inputc;
      private String med = "";
     
      public void tokenize (String a){
    	   inputc = a;
    	  int c=0;
    		int c1=0;
    		for(int i=0;i < inputc.length();i++)
    		{
    			if(inputc.charAt(i)=='(')
    				c++;
    			else if(inputc.charAt(i)==')')
    				c1++;
    		}
    		if(c!=c1)
    		{
    			System.out.println("This is incorrect string, please check your input");
    		}
    		else
    	  {
        String str = "";
         String[] fun={"sin","cos","tan","cosec","sec","cot"};
     
        Stack<String> stack = new Stack<String>();
        Stack<String> stack1 = new Stack<String>();
     
        for (int i = 0; i < inputc.length(); i++){
          str = inputc.substring(i,i+1);
          if(str.matches("fun"))
    		{
            med = str;
    	    stack1.push(med);
    		}
          else if (foundOperator(str)){
            if (stack.isEmpty()){
              stack1.push(str);
            }
            else{
              String stackTop = stack.peek();
              while (getPrecedence(stackTop,str).equals(stackTop)
                     && !(stack.isEmpty())){
                med = stack.pop();
                 stack1.push(med);
                if (!(stack.isEmpty()))
                  stackTop = stack.peek();
              }
              stack1.push(str);
            }
          }
        }
        while(!(stack.isEmpty()))
    	  {
          med = stack.pop();
    	stack1.push(med);
    	  }
    	  while (!stack1.isEmpty())
    {
    System.out.print(stack1.peek() + " ");
    stack1.pop();
    }
     
      }
     
      private boolean foundOperator(String ch){
        String operators = "*/%+-";
        if (operators.indexOf(ch) != -1)
          return true;
        else
          return false;
      }
     
      private String getPrecedence(String op1, String op2){
        String multiplicativeOps = "*/%";
        String additiveOps = "+-";
        if ((multiplicativeOps.indexOf(op1) != -1) && (additiveOps.indexOf(op2) != -1))
          return op1;
        else if ((multiplicativeOps.indexOf(op2) != -1) && (additiveOps.indexOf(op1) != 
                                                            -1))
          return op2;
        else if((multiplicativeOps.indexOf(op1) != -1) && (multiplicativeOps.indexOf   
                                                           (op2) != -1))
          return op1;
        else
          return op1;
      }
     
    }
     }
     
    class Complex_Trigonometry
     
    {
    public static void main(String[] args) {
     
        System.out.println("Enter the trigonometric function which is to be plotted:-");
        Scanner scanner = new Scanner(System.in);
     
        String input = scanner.nextLine();
    	Tokenizer t = new Tokenizer();
     
        t.tokenize(input);
    }
     
     
    }

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