Does pcolormesh plot the 2D array rightside-up or upside-down?

Question

Every time I go to plot a 2D array in matplotlib using, for example, pcolormesh , I have the same question: Is the resultant image showing the array rightside-up or upside-down? That is, is index (0, 0) at the top left of the plot or the bottom left?

It's tedious to write a test every six months to remind myself. This should be clearly documented in an obvious place, like SO.

Answer 1

该数组上下颠倒绘制，这意味着索引(0, 0)在左下方。