Add a simple cmake example

KevinLADLee · KevinLADLee · commit c4fb836ec60e · 2018-06-15T11:11:29.000+08:00
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -0,0 +1,16 @@
+project(matplotlib_cpp)
+cmake_minimum_required(VERSION 3.1)
+set(CMAKE_CXX_STANDARD 14)
+set(PYTHON_LIBRARY /usr/lib/x86_64-linux-gnu/libpython2.7.so)
+set(PYTHON_INCLUDE_DIR /usr/include/python2.7)
+find_package(PythonLibs 2.7 REQUIRED)
+
+include_directories(${PYTHON_INCLUDE_DIRS})
+
+add_executable(modern modern.cpp matplotlibcpp.h)
+
+message(${PYTHON_LIBRARIES})
+target_link_libraries(
+modern
+${PYTHON_LIBRARIES}
+)
diff --git a/modern.cpp b/modern.cpp
@@ -0,0 +1,26 @@
+#include <cmath>
+#include "matplotlibcpp.h"
+
+using namespace std;
+namespace plt = matplotlibcpp;
+
+int main() 
+{    
+    // Prepare data.
+    int n = 5000; // number of data points
+    vector<double> x(n),y(n); 
+    for(int i=0; i<n; ++i) {
+        double t = 2*M_PI*i/n;
+        x.at(i) = 16*sin(t)*sin(t)*sin(t);
+        y.at(i) = 13*cos(t) - 5*cos(2*t) - 2*cos(3*t) - cos(4*t);
+    }
+
+    // plot() takes an arbitrary number of (x,y,format)-triples. 
+    // x must be iterable (that is, anything providing begin(x) and end(x)),
+    // y must either be callable (providing operator() const) or iterable. 
+    plt::plot(x, y, "r-", x, [](double d) { return 12.5+abs(sin(d)); }, "k-");
+
+
+    // show plots
+    plt::show();
+} 
