如何使图像和散点图具有相同的高度？

Question

我正在画两个不同的副图。一个是图像，另一个是散点图。你知道吗

fig = plt.figure(figsize=(16, 8))

# here I am drawing a greyscale image
image = img.imread(file_name)
fig.add_subplot(1, 2, 1).imshow(image, cmap=cm.Greys_r)
fig.tight_layout()
plt.axis('off')

# and here I am drawing a scatterplot based on this image.
X, Y = image.shape
x, y = np.nonzero(image)
fig.add_subplot(1, 2, 2).scatter(y - Y, -x)
fig.tight_layout()

问题是当我画它们的时候，它们有不同的高度。我怎样才能使高度相同？

查找设置高度matplotlib不会给出合适的结果。你知道吗

Answer 1

您需要将关键字aspect='auto'添加到imshow调用中。所以应该是这样的：

fig.add_subplot(1, 2, 1).imshow(image, cmap=cm.Greys_r, aspect='auto')

根据文件：

aspect : [‘auto’ | ‘equal’ | scalar], optional, default: None

If ‘auto’, changes the image aspect ratio to match that of the axes.

If ‘equal’, and extent is None, changes the axes aspect ratio to match that of the image. If extent is not None, the axes aspect ratio is changed to match that of the extent.

If None, default to rc image.aspect value.