Cell array indexing in loop for subplot titles

Question

Jason 2019-10-22

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/486733-cell-array-indexing-in-loop-for-subplot-titles

编辑： Stephen23 2019-10-22

采纳的回答： Stephen23

在 MATLAB Online 中打开

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).'

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Stephen23 2019-10-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/486733-cell-array-indexing-in-loop-for-subplot-titles#answer_397623

编辑：Stephen23 2019-10-22

在 MATLAB Online 中打开

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.