boxplot and how to change x-axis

Hi,

I have a matrix (100,7) with data which I want to plot with boxplot. boxplot(matrix) does the job but I haven't figured out yet how I can change the x-axis. Now it draws a box for each column of the matrix. So, the labels go from 1 to 7. I want to replace 1 to 7 with elements provided by another vector (with 7 elements). How can I do that?

Answer 1

[Oleg Komarov]

Use the labels option as described in the docs of boxplot:

X = randn(100,4);
boxplot(X,'Labels',{'one','two','three','four'})

Oleg

[Muhlbauer]

All right. Your suggestion works but is a little bit cumbersome.

If the dimensions of X would change I would also have to adapt the labels...

The doc says that I can pass a numeric vector. However, that doesn't work and gives the error

Error using ==> boxplot at 205

Incorrect number of box labels.

even if the number of labels is 7.

[Oleg Komarov]

Can you show the code that gives you the error?

I don't get any error if I pass a numeric vector of labels, 7, 5 or whatever they are as long as they match the number of columns of my data

Answer 2

[Walter Roberson]

See the example of a few minutes ago posted by a different user, here

Answer 3

[Muhlbauer]

It seems there is a bug in boxplot on line 204 in order to support label input from a given input vector.

Adding ~(isvector(labels) && numel(labels)==n) to the if statement beginning on line 202 fixes this issue!