Re: different color bar graph

[Przemek Klosowski]

On 6/11/19 11:40 PM, shivax via Help-octave wrote:
> T=[4 5 -1 4 -9 -4]
>
> i want to color green the positive number and color green the other
>
> hold on
> figure;
> pos=find(T>0);
> neg=find(T<=0);
>
> h=bar(pos,T(pos),'facecolor','g');
> v=bar(neg,T(neg),'facecolor','r');
'help bar' shows an example of what you're trying to do; please always 
read the help first.

You have to split your data into columns which you then can define 
properties for. Fortuitously, your data splits evenly between negative 
and positive, so

tt=[T(pos);T(neg)]'
h=bar(tt);

will use different colors. If you want specific colors, you'd get the 
figure handle and modify the properties like so:

set(h(1),"facecolor",'g')
set(h(2),"facecolor",'r')

I leave it as an exercise to figure out what to do if the number of 
positive values was different than negatives.