回答編集履歴
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test
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plt.ylim((20,34))
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---
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```python
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import matplotlib.pyplot as plt
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import numpy as np
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def samplemat(dims, shift=0):
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"""Make a matrix with all zeros and increasing elements on the diagonal"""
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aa = np.zeros(dims)
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for i in range(min(dims)):
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aa[i, i] = i
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aa = np.vstack((np.zeros((shift, aa.shape[-1])), aa))
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return aa
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shift = 20
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size = (15, 35)
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# Display matrix
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fig, ax = plt.subplots(dpi=200)
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ax.matshow(samplemat(size, shift=shift-1))
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ax.set_ylim((size[0]+shift-1.5,shift-0.5))
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plt.show()
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```
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