更改imshow的轴比例 [英] Change the axis scale of imshow

问题描述

我正在用imshow可视化MATLAB中的矩阵.但是，我希望y和x轴切换位置，使x对应于矩阵的行索引，而y对应于col索引.

I'm visualizing a matrix in MATLAB with imshow. However, I'd like the y and x axis to switch places, making x correspond to the row-index of the matrix, and y correspond to the col-index.

我还想将轴的增量值更改为0.01，以使第10行的x值为0.1，第100行的值为1，依此类推.

I also want to change the increment value of the axises to 0.01, so that row 10 has x value 0.1, row 100 has 1 and so on.

推荐答案

要交换轴，您将需要更改轴的视图.默认情况下，2D视图的y轴垂直，x轴水平.您可以通过将视图旋转90度来更改此设置.

To swap the axes you will want to change the view of the axes. By default the 2D view has the y axis vertical and x axis horizontal. You can change this by rotating the view 90 degrees.

view(-90,90)   % Default is view(0, 90)

要更改增量，您将要更改imshow返回的image对象的XData和YData.

To change the increment, you will want to alter the XData and YData of the image object returned by imshow.

him = imshow(img, []);
set(him, 'XData', [0, size(img, 2)/100], 'YData', [0, size(img, 1)/100]);

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