Cell array indexing in loop for subplot titles

Hello, I can't see where my mistake is.

I have data (from a uitable) in whcih columns 2-6 are values I want to plot on 5 different subplots:

title={'# objects','centroid mean','centroid mode','FM','Q99'}
n=size(data,1)    %number of rows in my data table
X=linspace(1,n, n)

for i=2:6
      Y=data(:,i)
      if isa(Y,'cell')   %if data is a cell array, then convert to ordinary data type.
         Y=cell2mat(Y);    
      end 
      subplot(2,3,i-1)
      plot(X,Y,'r*--')   
      grid
      set(gca,'fontsize',8)     
      tl=title{i-1}
      class(tl)
      title(tl,'color','r')
end 

Im getting an error message (in the line title(tl,'color','r')) :

'Index in position 1 exceeds array bounds (must not exceed 1).'

Answer 1

[Stephen23]

You defined a variable named title:

title={'# objects','centroid mean','centroid mode','FM','Q99'}

which shadows the title function (making the title function unusable). You then use indexing into your variable (which you probably think is calling the title function, but in reality is subscript indexing, because you defined that title variable):

title(tl,'color','r')

Do NOT use title as a variable name! (or save or cell or length or ...)

Change that variable name to something else, clear your workspace, and try again.

[Jason]

AH yes, perfect thankyou!

Jason