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CryorisCryoris
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resolve merge conflict
2 parents bff24dd + ed2c5c3 commit 47f10ae

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3 files changed

+74
-37
lines changed

3 files changed

+74
-37
lines changed

‎examples/CMakeLists.txt

+1
Original file line numberDiff line numberDiff line change
@@ -21,6 +21,7 @@ add_example(eigen)
2121
add_example(errorbar)
2222
add_example(fill_inbetween)
2323
add_example(fill)
24+
add_example(imshow)
2425
add_example(legend)
2526
add_example(loglog)
2627
add_example(minimal)

‎examples/imshow.cpp

+22
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,22 @@
1+
#define __USE_MATH_DEFINES
2+
#include <cmath>
3+
#include <Eigen/Dense>
4+
#include "../matplotlibcpp.h"
5+
namespace plt = matplotlibcpp;
6+
7+
void waves(const unsigned n) {
8+
Eigen::MatrixXd X(n, n);
9+
for (unsigned i = 0; i < n; ++i) {
10+
for (unsigned j = 0; j < n; ++j) {
11+
X(i, j) = sin(3.0 * M_PI * i / n) * cos(20.0 * M_PI * j / n);
12+
}
13+
}
14+
plt::figure();
15+
plt::imshow(X);
16+
plt::show();
17+
}
18+
19+
int main() {
20+
waves(200);
21+
return 0;
22+
}

‎matplotlibcpp.h

+51-37
Original file line numberDiff line numberDiff line change
@@ -93,6 +93,7 @@ struct _interpreter {
9393
PyObject *s_python_function_suptitle;
9494
PyObject *s_python_function_bar;
9595
PyObject *s_python_function_subplots_adjust;
96+
PyObject *s_python_function_imshow;
9697

9798
/* For now, _interpreter is implemented as a singleton since its currently not
9899
possible to have multiple independent embedded python interpreters without
@@ -227,28 +228,30 @@ struct _interpreter {
227228
s_python_function_bar = PyObject_GetAttrString(pymod, "bar");
228229
s_python_function_subplots_adjust =
229230
PyObject_GetAttrString(pymod, "subplots_adjust");
231+
s_python_function_imshow = PyObject_GetAttrString(pymod, "imshow");
230232

231233
if (!s_python_function_show || !s_python_function_close ||
232234
!s_python_function_draw || !s_python_function_pause ||
233235
!s_python_function_figure || !s_python_function_fignum_exists ||
234236
!s_python_function_plot || !s_python_function_quiver ||
235-
!s_python_function_contour || !s_python_function_semilogx ||
236-
!s_python_function_semilogy || !s_python_function_loglog ||
237-
!s_python_function_fill || !s_python_function_fill_between ||
238-
!s_python_function_subplot || !s_python_function_legend ||
239-
!s_python_function_ylim || !s_python_function_title ||
240-
!s_python_function_axis || !s_python_function_xlabel ||
241-
!s_python_function_ylabel || !s_python_function_xticks ||
242-
!s_python_function_yticks || !s_python_function_xscale ||
243-
!s_python_function_yscale || !s_python_function_grid ||
244-
!s_python_function_xlim || !s_python_function_ion ||
245-
!s_python_function_ginput || !s_python_function_save ||
246-
!s_python_function_clf || !s_python_function_annotate ||
247-
!s_python_function_errorbar || !s_python_function_errorbar ||
248-
!s_python_function_tight_layout || !s_python_function_stem ||
249-
!s_python_function_xkcd || !s_python_function_text ||
250-
!s_python_function_suptitle || !s_python_function_bar ||
251-
!s_python_function_subplots_adjust || !s_python_function_spy) {
237+
!s_python_function_contour ||
238+
!s_python_function_semilogx || !s_python_function_semilogy ||
239+
!s_python_function_loglog || !s_python_function_fill ||
240+
!s_python_function_fill_between || !s_python_function_subplot ||
241+
!s_python_function_legend || !s_python_function_ylim ||
242+
!s_python_function_title || !s_python_function_axis ||
243+
!s_python_function_xlabel || !s_python_function_ylabel ||
244+
!s_python_function_xticks || !s_python_function_yticks ||
245+
!s_python_function_xscale || !s_python_function_yscale ||
246+
!s_python_function_grid || !s_python_function_xlim ||
247+
!s_python_function_ion || !s_python_function_ginput ||
248+
!s_python_function_save || !s_python_function_clf ||
249+
!s_python_function_annotate || !s_python_function_errorbar ||
250+
!s_python_function_errorbar || !s_python_function_tight_layout ||
251+
!s_python_function_stem || !s_python_function_xkcd ||
252+
!s_python_function_text || !s_python_function_suptitle ||
253+
!s_python_function_bar || !s_python_function_subplots_adjust ||
254+
!s_python_function_spy || !s_python_function_imshow) {
252255
throw std::runtime_error("Couldn't find required function!");
253256
}
254257

@@ -292,7 +295,9 @@ struct _interpreter {
292295
!PyFunction_Check(s_python_function_text) ||
293296
!PyFunction_Check(s_python_function_suptitle) ||
294297
!PyFunction_Check(s_python_function_bar) ||
295-
!PyFunction_Check(s_python_function_subplots_adjust)) {
298+
!PyFunction_Check(s_python_function_subplots_adjust) ||
299+
!PyFunction_Check(s_python_function_imshow)
300+
) {
296301
throw std::runtime_error(
297302
"Python object is unexpectedly not a PyFunction.");
298303
}
@@ -303,24 +308,6 @@ struct _interpreter {
303308
~_interpreter() { Py_Finalize(); }
304309
};
305310

306-
void process_keywords(PyObject *kwargs,
307-
const std::map<std::string, std::string> &keywords) {
308-
for (auto const &item : keywords) {
309-
// check if the keyword is a number
310-
try {
311-
std::stringstream ss(item.second);
312-
double d;
313-
ss >> d;
314-
PyDict_SetItemString(kwargs, item.first.c_str(), PyFloat_FromDouble(d));
315-
}
316-
// if its not, then leave it as string
317-
catch (std::exception& e) {
318-
PyDict_SetItemString(kwargs, item.first.c_str(),
319-
PyString_FromString(item.second.c_str()));
320-
}
321-
}
322-
}
323-
324311
} // end namespace detail
325312

326313
// must be called before the first regular call to matplotlib to have any effect
@@ -676,6 +663,29 @@ bool semilogy(const VectorY &y,
676663
return semilogy(x, y, "", keywords);
677664
}
678665

666+
template <typename Matrix>
667+
void imshow(const Matrix& X, const std::map<std::string, std::string> &keywords = {}) {
668+
PyObject *Xarray = get_2darray(X);
669+
670+
PyObject *kwargs = PyDict_New();
671+
for (std::map<std::string, std::string>::const_iterator it = keywords.begin();
672+
it != keywords.end(); ++it) {
673+
PyDict_SetItemString(kwargs, it->first.c_str(),
674+
PyUnicode_FromString(it->second.c_str()));
675+
}
676+
677+
PyObject *plot_args = PyTuple_New(1);
678+
PyTuple_SetItem(plot_args, 0, Xarray);
679+
680+
PyObject *res = PyObject_Call(
681+
detail::_interpreter::get().s_python_function_imshow, plot_args, kwargs);
682+
683+
Py_DECREF(plot_args);
684+
Py_DECREF(kwargs);
685+
if (res)
686+
Py_DECREF(res);
687+
}
688+
679689
// @brief plot_surface for datapoints (x_ij, y_ij, z_ij) with i,j = 0..n
680690
// @param x The x values of the datapoints in a matrix
681691
// @param y The y values of the datapoints in a matrix
@@ -1389,7 +1399,11 @@ inline void legend(const std::string &loc = "best",
13891399
}
13901400

13911401
// add other keywords
1392-
detail::process_keywords(kwargs, keywords);
1402+
for (std::map<std::string, std::string>::const_iterator it = keywords.begin();
1403+
it != keywords.end(); ++it) {
1404+
PyDict_SetItemString(kwargs, it->first.c_str(),
1405+
PyString_FromString(it->second.c_str()));
1406+
}
13931407

13941408
PyObject *res =
13951409
PyObject_Call(detail::_interpreter::get().s_python_function_legend,

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