CODEWITHSUNDEEP
pythonmatplotlibhistogram
Linda
Linda

Reputation: 321

Placing multiple histograms in a stack with matplotlib

I am trying to place multiple histograms in a vertical stack. I am able to get the plots in a stack but then all the histograms are in the same graph. 

fig, ax = plt.subplots(2, 1, sharex=True, figsize=(20, 18))

n = 2

axes = ax.flatten()
for i, j in zip(range(n), axes):
    plt.hist(np.array(dates[i]), bins=20, alpha=0.3)


plt.show()

enter image description here

Upvotes: 0

Views: 375

Answers (1)

Sheldore
Sheldore

Reputation: 39052

You have a 2x1 grid of axis objects. By directly looping over axes.flatten(), you are accessing one subplot at a time. You then need to use the corresponding axis instance for plotting the histogram.

fig, axes = plt.subplots(2, 1, sharex=True, figsize=(20, 18)) # axes here

n = 2

for i, ax in zip(range(n), axes.flatten()): # <--- flatten directly in the zip
    ax.hist(np.array(dates[i]), bins=20, alpha=0.3)

Your original version was also correct except the fact that instead of plt, you just should have used the correct variable i.e. j instead of plt

for i, j in zip(range(n), axes):
    j.hist(np.array(dates[i]), bins=20, alpha=0.3)

Upvotes: 1

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