C++ : need quick tips for easy histogram

trapeze · #1 09-07-2007, 02:51 PM

i'm stuck with assignment...

i am trying to do easy histogram with x-axis info(like number options) and y-axis info(like # of occurrence) all within a figure by C++. however, i've no ideas to proceed at all.

i am thinking about the following data: x-axis values are 1,2, and 3. y-axis values are 3, 7, and 4 for each x value respectively.

i hope to hear you guys. great thx.

trapeze · #2 09-07-2007, 03:49 PM

if the above is too easy, please help me out w/ the folowing:

Code:

#include<iostream>
using namespace std;

int main()
{

int i;
int j;
int k;
int occurrence[10]={0,0,0,0,0,0,0,0,0,0};
int data[10]={6,14,82,42,46,32,97,44,27,68};
for (j=0; j<10; j++)
  { 
    for (i=0; i<10; i++)
        { 
          if ((data[j] >= 10*i) && (data[j] < 10*i+9)) 
             occurrence[i]++;
        }
  } 
cout << "occurrence # is ";
for (k=0; k<10; k++)
cout << occurrence[k]<<" "; 

}

----------------------------------------------------------
i don't know how to plot. i can't find the funtions. x-axis is 0-9,10-19,..,90-99. y-axis is the result above.

also, how can i generate zero array at once for occurrence w/o typing them out ?

great thx !

shabbir · #3 09-07-2007, 09:58 PM

For plotting you need to be doing some graphics fucntions and can you tell what OS and compiler you are using.

trapeze · #4 09-07-2007, 11:21 PM

Quote:

Originally Posted by shabbir

For plotting you need to be doing some graphics fucntions and can you tell what OS and compiler you are using.

THX !

WinXP 2.0
Dev-C++