Plot numpy matrix as violinplot in python

Question

I have a problem with a violin plot. I'm trying to create 11 violin plots corresponding to 11 numpy matrices. I used this code and the result is shown in the figure:

for i in range(0,len(diff)):
    sns.violinplot(y=diff[i],orient='v')

I want to split all the violin plots and put a label below them.

Thanks for your help.

Diziet Asahi · Accepted Answer · 2019-12-06 15:25:31Z

1

Use matplotlib directly, instead of seaborn:

diff = np.array([np.random.normal(loc=i, size=(100,)) for i in range(10)])

fig, ax = plt.subplots()
for i in range(0,len(diff)):
    ax.violinplot(dataset=diff[i],positions=[i])

Or, more compact:

fig, ax = plt.subplots()
ax.violinplot(dataset=diff.T,positions=range(10))

If your numpy arrays are separate:

array1 = np.random.normal(loc=0, size=(100,))
array2 = np.random.normal(loc=1, size=(100,))
array3 = np.random.normal(loc=2, size=(100,))
array4 = np.random.normal(loc=3, size=(100,))
array5 = np.random.normal(loc=4, size=(100,))


fig, ax = plt.subplots()
for i,arr in enumerate([array1, array2, array3, array4, array5]):
    ax.violinplot(dataset=arr,positions=[i])

edited Dec 6, 2019 at 15:25

answered Dec 6, 2019 at 13:55

Diziet Asahi

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6 Comments

kino Over a year ago

thanks for the answer but i have a different problem, I want to create 11 a violin plot, this 11 violin plot come from 11 different numpy matrix, not one with 11 rows

Diziet Asahi Over a year ago

is diff a list of vectors? Your notation diff[i] in your code seem to imply that

Diziet Asahi Over a year ago

I've added another snippet for how to deal with several separate arrays

kino Over a year ago

diff[i] is a list of numpy matrix

Diziet Asahi Over a year ago

Then the first or last solutions that I propose should get you where you want, don't they?

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My Work · Accepted Answer · 2020-07-07 14:04:44Z

1

Or if you want to use seaborn:

diff = np.array([np.random.normal(loc=i, size=(100,)) for i in range(10)])
sns.violinplot(data=diff.T)

answered Jul 7, 2020 at 14:04

My Work

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