# Bar Graph Stacked with Negative and Positive values

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Brishen on 7 Oct 2011
Edited: Koorosh Aslansefat on 17 Jul 2020
Hi.
I'm trying to get a plot to act like the graph function in excel that stacks values together. It does this by putting all positive values on the positive part of the axis, and the negative values on the negative side.
Unfortunatly when I use bar(X,'stack') with matlab it doesn't do this.
Is there any way to get this same functionality? Thanks.

Brishen on 7 Oct 2011
I think that I figured this out. The trick is to do two graphs and to seperate out the positive and negative values:
>> X = rand(4,3) - 0.5;
>> Xneg = X;
>> Xneg(Xneg>0) = 0;
>> Xpos = X;
>> Xpos(Xpos<0) = 0;
>> hold on
>> bar(Xneg,'stack')
>> bar(Xpos,'stack')
>> hold off

Walter Roberson on 7 Oct 2011
It isn't clear to me that what you describe would be appropriate? 'stacked' means to show the cumulative sum with internal divisions. If some members of the bar are positive and others are negative, then if you have a break at the axis then you misrepresent the cumulative sum.
##### 2 CommentsShowHide 1 older comment
Walter Roberson on 7 Oct 2011
Something like this, perhaps:
t1 = X;
t2 = X;
t1(t1<0) = nan;
t2(t2>0) = nan;
Xsplit = reshape([t2.';t1.'],size(t,2),[]).';
bar(Xsplit,'stacked')

Koorosh Aslansefat on 17 Jul 2020
Edited: Koorosh Aslansefat on 17 Jul 2020
I would suggest to try this:
bar(X,'BaseValue',0) 