Thread: Plotting a graph with Koolplot

I'm trying to plot a graph using koolplot, but nothing happens when I try to run the program. Anybody here knows how to use koolplot?


Here's the code:

Code:

#include <koolplot.h>
#include <stdio.h>

void graph(double g);

int main()
{
	 double a = 5.5, b = 2.5, gh;
	 
	 gh = a / b;
     
	 graph(gh);	

         return 0;
}



void graph(double g)
{
	plotdata x(-10, 10);
	plotdata y = g;
	plot(x,y);
}

Any help would be much appreciated, thanks!

i see alot of references to quincey, do you have it?
http://codecutter.org/tools/quincy/index.html

Originally Posted by nadroj

i see alot of references to quincey, do you have it?
http://codecutter.org/tools/quincy/index.html

Yeah, thats how I came up with the codes. But for some reason it didn't work, any ideas why?

your using quincy to compile it? if so and still doesnt work then i dont know as ive never used it

Originally Posted by nadroj

your using quincy to compile it? if so and still doesnt work then i dont know as ive never used it

Yeah, i'm using quincy. And thanks for trying anyway.

Maybe i can help out.
Whats the error when u compile it?

ok i installed quincy and got it working, kind of an unusual 'IDE'.

heres how:

1 open quincy
2 file > new > project
3 fill in target name and path, select 'koolplot' application
4 click 'ok'
5 for the window that pops up right click and 'insert file'
6 browse to your source code (ie .c/.cpp file)
7 click build or run or whatever, it should pop up.

I think there is some problem with the source code though.
-The plotdata is case sensitive.
So, it should be Plotdata
-Um.. I don't know what u're assigning to your Y-Axis. I think you shouldn't put only a single value inside the axis.
-Like nadroj said, you must assign a koolplot project to your source code first.

can u get the most simple graph to work?

Code:

#include<stdio.h>
#include<koolplot.h>

int main()
{
   Plotdata x(0,90);
   Plotdata y = x * x;

   plot(x,y);

   return 0;
}

If this code doesn't work, then the problem is in your quincy.

see my post 7.

Thanks for the tips guys, I wrote some new codes just now and got the program to compile. But there seems to be something wrong with the koolplot function I wrote.

The following error popped up, Any ideas what's going on?

graph.c:24 error: cannot convert 'double' to 'double' for argument '1' 'void graph(double*, int)'

Here's the source code

Code:

#include <stdio.h>
#include <koolplot.h>
#define A 100

void graph(double num[], int z);
int main()
{

int col, z=0, n=0;
double col2[A], half[A];	
FILE *data;	   
	
data = fopen("textfile.txt", "r");	 

while (fscanf(data, "%lf %lf", &col, &col2[z]) == 2)
       {
	   
	  half[n] = col2[z]/2;  
          printf("\n%d %lf\n", col, half[n]);
	  graph(half[n], col);	  
			
	  z++;
	  n++;		   
       }
	   
fclose(data);
return 0;
}

/* Is there something wrong with the function? */

void graph(double num[], int z)
{	 
	Plotdata x(0, 20);
	Plotdata y(num, z);
	plot(x,y);
}

the text file I'm using:

Code:

0.5 301.232
1.5 311.311
2.5 321.123
3.5 282.776
4.5 569.650
5.5 554.225
6.5 196.213
7.5 1221.128
8.5 770.550
9.5 922.232

your function is defined as:

Code:

void graph(double num[], int z);

then you call it like this:

Code:

graph(half[n], col);

do you see whats wrong?

col is an 'int'
is 'half[n]' a 'double[]'?

Even though if you fix that error, i think you're getting runtime error there.
Here is how it should have done. Look thoroughly, and try to understand.

Code:

#include<stdio.h>
#include<koolplot.h>

int main()
{
	int i, count;
	double col1 ,col2;
	FILE *filePtr;
	
	Plotdata x,y;
	
	filePtr = fopen("textfile.txt","r");
	
	if(filePtr == NULL) printf("Error.....\n");
	
	while(fscanf(filePtr,"%lf %lf",&col1,&col2) == 2)
		point(x,y,col1,col2);
		
	fclose(filePtr);
	
	plot(x,y);
	
	return 0;
}