How can I rename a colum? How can I show several matrices/vectors within one Boxplot?

Hello,

I got a matrix like this:

>> z= rand(4)

z =

    0.3816    0.4898    0.7547    0.1626
    0.7655    0.4456    0.2760    0.1190
    0.7952    0.6463    0.6797    0.4984
    0.1869    0.7094    0.6551    0.9597

And if I boxplot it, it only shows me 1,2,3,4 in the x-axis:

    boxplot(z)

I would like to rename the columns? Is it possible?

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And I have another question:

How can I integrate several matrices/vectors within a boxplot?

I got seperated matrix for the base, the testing and the resting afterwards.

And I would like to have something like this:

base 1, base 2 , base 3, testing 1, testing 2, testing 3, resting 1, resting 2, resting 3 and the according Boxplot above it.

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Thanks!

Answer 1

[dpb]

1. use optional named labels parameter--boxplot(z,'labels',{'A','B','C','D'})
2. boxplot([base testing resting]) % each is assumed to be nx3 array