box plot on noisy data

Community matplotlib-users
1

This example works fine for me using matplotlib version 0.98.3 and
I've also made many boxplots with unequal numbers of elements with
earlier matplotlib versions.

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On Thu, 11 Sep 2008 21:02:30 -0600, Steve Sullivan <steves@...157...> wrote:

But boxplot seems to demand that each box represent the same
number of values. For example, if day 1 had 5 observations
and day 2 had only 4 obs, we'd have the program:

import pylab as pb
vals = [ [1,2,3,4,5], [10,20,30,40]]
pb.boxplot( vals)
pb.show()

This gives:
Traceback (most recent call last): ...
ValueError: setting an array element with a sequence.

2

import pylab as pb
vals = [ [1,2,3,4,5], [10,20,30,40]]
pb.boxplot( vals)
pb.show()

This gives:
Traceback (most recent call last): ...
ValueError: setting an array element with a sequence.

I had this problem just recently... It wasn't so much the box plot as
the numpy array. I ended up plotting a list of numpy arrays of
different lengths, rather than a single 2 dimensional array. Try:

vals = [numpy.array([1,2,3,4,5]),numpy.array([10,20,30,40])]

and see if it works?

Eric