Error: subscript indices must either be real positive integers or logicals.

Hello,

this part of function doesn't working and I don't have any idea why.

hA=axes;
hold on
for i=1:length(Data)
    hL(i)=plot(hA,Data(i).x,Data(i).y);
    set(hL(i),'LineWidth',LW{i});
end

If I type this code in command window it work perfectly. If I use it as part of function it return:

Subscript indices must either be real positive integers or logicals.
Error in plotGraph (line 144)
    set(hL(i),'LineWidth',LW{i});

[Adam]

Use

dbstop if error

and look at what 'i' is on the line in question.

Answer 1

[Jan]

It seems like you have created a variable called "set". Then the arguments are treated as indices and the string causes the error:

set = rand(100, 100, 3)
set(hL(i), 'LineWidth', LW{i});
%           ^ Bad index!

The solution is easy: Do not use "set" as name of a variable.

To check if this is the problem, let Matlab stop, when the error occurs: Type this in the command window and run your code again:

dbstop if error

Now check:

which set -all

I guess, the topmost result is a local variable, and not Matlab's built-in function.

[Sergey Kasyanov]

Thanks!