Orientation of y-axis in Heatmap

The default orientation of the y-axis in the Heatmap graph is, at least to me, unexpected. The 0,0 coordinate of the plot is in the lower left corner. A heatmap is generally used to display a matrix, such as an image, however, and the 0,0 index into the matrix would be in the top left corner. An image is thus displayed flipped upside down. One can of course flip the z array or provide the values for y in reversed order, but this keeps the labelling of the axis and the display of y,x in the hover window unaffected. I like the way this is handled in matplotlib.pyplot.imshow, which provides an origin argument.
An additional argument for the Heatmap graph to control the orientation of the y-axis would be nice.

從 Heatmap 圖表的進入點開始，檢查其 y 軸和懸停標籤的處理方式；將要求的行為與 matplotlib.pyplot.imshow 的 origin 參數進行比較。當選用的 orientation 參數能夠控制顯示的 y 方向，同時軸標籤和懸停座標保持一致，並且涵蓋兩種方向時，即視為完成。