Highlight highest bar in bar chart matlab

Is there anyway to highlight/mark the highest or lowest bar in matlab? I'm using the following code to plot bar chart

 r2=10,20,30
figure; 
bar(r2,'m');
set(gca,'XTickLabel',{'a','b','c'})
set(gca,'YTickLabel',{r2})
xlabel('shops');
ylabel('distance in kilometers')

please tell me how can i highlight highest bar i.e. 30 or lowest i.e. 10 ?

[the cyclist]

Can you be more specific on what you mean by "highlight"? Do you want it to be a different color, or have some text over it that says "highest", or what?

[Sarah]

Yes, anything that makes the highest or lowest bar prominent like giving it a different color or placing some text over it or marking its peak with a cross etc..

Answer 1

[the cyclist]

Here is one way:

r2=[10,20,30];

[maxBar,maxIndex] = max(r2);
[minBar,minIndex] = min(r2);

figure; 
bar(r2,'m');
text(maxIndex-0.05,maxBar+2,'Max')
text(minIndex-0.05,minBar+2,'Min')
set(gca,'XTickLabel',{'a','b','c'})
ylim([0 maxBar+5])

set(gca,'YTick',r2)
set(gca,'YTickLabel',{r2})
xlabel('shops');
ylabel('distance in kilometers')

[Sarah]

Its giving this error !

 Subscript indices must either be real positive integers or
logicals.

Error in ==> gps1 at 46 text(maxIndex-0.05,maxBar+2,'Max')

[Sarah]

However it's working outside my program.. Thanks alot! I'll fix it my way..