If I declare an

Eigen::Matrix _2D_data; /* The initialization does not matter. The first row holds the x-coordinates, and the second row holds the y-
coordinates. */

and I want to call

plt::plot(_2D_data.row(1), _2D_data.row(2));

the resulting plot will not be correct. Around 50% of the points will have their coordinates reversed (the x-coordinates will become y-coordinates and vice-versa).

To correctly plot, I have to write:

Eigen::VectorX x_coords{ _2D_data.row(0) };
Eigen::VectorX y_coords{ _2D_data.row(1) };

plt::plot(x_coords, y_coords);

Thanks for the otherwise great library!