cumulative distribution function (CDF),

[Ahmed2]

Hi guys,
the title says it all, I have produced list of numbers from a c++ program into an excel file, and I want to make a CDF graph out of it. What I know is that I need to find numbers greater than zero, then number greater than one and so... but when I looked at it, I figured out that I cannot have like 50 if condition in the program to check that. So, if anybody got a theory on how to do it, I will appreciate it if he shared it with me!!

[deceptikon]

the title says it all

If by "says it all" you mean that it says one can ignore your thread due to lack of information, I'd agree. :D Since I know jack squat about CDF, I'll just try to answer what I think is your question.

What I know is that I need to find numbers greater than zero, then number greater than one and so... but when I looked at it, I figured out that I cannot have like 50 if condition in the program to check that.

You can use a counted loop where the counter is the exclusive lower bound of numbers you're looking for:

#include <algorithm>
#include <functional>
#include <iostream>
#include <iterator>
#include <random>
#include <vector>
#include <ctime>

using namespace std;

int main()
{
    // Get a list of random numbers with possible negatives
    //
    auto rgen = bind(
        uniform_int_distribution<int>(-99, 99),
        mt19937((unsigned)time(nullptr)));
    vector<int> v;
    
    generate_n(back_inserter(v), 10, rgen);
    
    // Find the numbers greater than any given value in the range
    //
    int ubound = *max_element(v.begin(), v.end());
    vector<vector<int>> distribution(ubound);
    
    for (int i = 0; i != ubound; i++)
    {
        for_each(v.begin(), v.end(), [&](int x)
            {
                if (x > i)
                {
                    distribution[i].push_back(x);
                }
            });
    }
    
    // Display the raw results
    //
    for_each(distribution.begin(), distribution.end(), [](vector<int> x)
        {
            if (!x.empty())
            {
                copy(x.begin(), x.end(), ostream_iterator<int>(cout, " "));
                cout << endl;
            }
        });
}