problems with +ve & -ve values in bar stacked

Hi to all,

I am having a problem with the comand bar stacked.

I am trying to do a bar chart with the stacked option. This
is supposed to accumulate the values in each bar.

The problem is that when one of the values is negative, the
stacking goes crazy. Instead of puting one bar negative and
the others positive, it substracts the negative value from
one of the positive values.

Does anyone know how to solve this?

Find a very simple code highlighting this problem:

Y = [-1 2 3
1 1 2];

bar(Y,'stack')

You will see how the first bar has a value that is half
positive and half negative. That is, the program has
applied some odd operation to the values.

Thanks,

Pablo
.

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