How to call python matplotlib in Qt C++ project?

Question

Python matplotlib gives very nice figures. How to call python matplotlib in Qt C++ project? I'd like to put those figures in Qt dialogs and data are transferred via memory.

Answer 1

You can create a python script with function calls to matplotlib and add them as callback functions in your C++ code.

This tutorial explains how this can be done.

I also recommend reading the documentation on Python.h.

Answer 2

I would try using matplotlib-cpp. It is built to resemble the plotting API used by Matlab and matplotlib. Basically it is a C++ wrapper around matplotlib and it's header only. Keep in mind though that it does not provide all the matplotlib features from python.

Here is the initial example from GitHub:

#include "matplotlibcpp.h"
namespace plt = matplotlibcpp;
int main() {
    plt::plot({1,3,2,4});
    plt::show();
}

Compile

g++ minimal.cpp -std=c++11 -I/usr/include/python2.7 -lpython2.7