Scale Y axis of matplotlib plot in jupyter notebook

Question

I want to scale Y axis so that I can see values, as code below plots cant see anything other than a thin black line. Changing plot height doesn't expand the plot.

import numpy as np
import matplotlib.pyplot as plt

data=np.random.random((4,10000))
plt.rcParams["figure.figsize"] = (20,100)
#or swap line above with one below, still no change in plot height
#fig=plt.figure(figsize=(20, 100))
plt.matshow(data)
plt.show()

One way to do this is just repeat the values then plot result, but I would have thought it possible to just scale the height of the plot?

data_repeated = np.repeat(data, repeats=1000, axis=0)

David M. · Accepted Answer · 2021-01-23 10:19:42Z

1

You can do it like this:

import numpy as np
import matplotlib.pyplot as plt

data=np.random.random((4, 10000))
plt.figure(figsize=(40, 10))
plt.matshow(data, fignum=1, aspect='auto')

plt.show()

Output:

answered Jan 23, 2021 at 10:19

David M.

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