seaborn.kdeplot (pandas.DataFrame) - ValueError: If using all scalar values, you must pass an index

Question

I want to make a kdeplot for my pandas dataframe. I used the code below:

mean = [0,0]

cov = [[1,0],[0,100]]

dataset2 = np.random.multivariate_normal(mean,cov,1000)

dframe = pd.DataFrame(dataset2,columns=['X','Y'])

sns.kdeplot(dframe)

And got this error message:

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-20-852468cc1da8> in <module>()
      7 dframe = pd.DataFrame(dataset2,columns=['X','Y'])
      8 
----> 9 sns.kdeplot(dframe)

9 frames
/usr/local/lib/python3.6/dist-packages/pandas/core/internals/construction.py in extract_index(data)
    385 
    386         if not indexes and not raw_lengths:
--> 387             raise ValueError("If using all scalar values, you must pass an index")
    388 
    389         if have_series:

ValueError: If using all scalar values, you must pass an index

How should I amend my code?

Note: It works when I instead use:

sns.kdeplot(dframe.X,dframe.Y)

sns.kdeplot(dframe) is not valid syntax, as per seaborn.kdeplot. You have not properly specified the parameters in order. — Trenton McKinney
– Trenton McKinney, Commented Dec 23, 2020 at 10:29
Ok, thank you! So, the code I wrote seems to be deprecated because it worked before (according to a Udemy course). — Tobitor
– Tobitor, Commented Dec 23, 2020 at 10:40

buddemat · Accepted Answer · 2021-07-06 13:19:53Z

2

you need to assign the columns to the plot

sns.kdeplot(data=dframe,x='X',y='Y')

edited Jul 6, 2021 at 13:19

buddemat

5,33016 gold badges37 silver badges61 bronze badges

answered Jul 6, 2021 at 8:37

pkhsp

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