I'm getting a matrix subscript index error

The error is:

Subscript indices must either be real positive integers or logicals.

I'm referencing each matrix using the following:

time_stamp = [time_stamp; datestr(now, 31)];
fprintf(fid, %s ... ,time_stamp(end, 1:end), ...);

This is in a while loop and time_stamp grows each cycle through by one string. Why am I getting this error if I'm using 'end' to reference the matrix?

[Azzi Abdelmalek]

How are we supposed to know ? please post your code with the line causing the error

[Brian]

Those are the two lines of code causing the error.

[Matt J]

What does DBSTOP tell you? In particular, when code execution stops at the K>> prompt and you execute

 K>> time_stamp(end, 1:end)

what is the result?

[Brian]

The result gives me the error when I try doing the step-through method for debugging.

[Matt J]

I'm not sure you answered my question. What specifically is the output (include error messages please) when you execute this expression in isolation

K>> time_stamp(end, 1:end)

Answer 1

[Walter Roberson]

You assigned a value to a variable named "datestr" and then tried to use datestr() as a function call.

[Azzi Abdelmalek]

Brian commented

datestr() is a built-in function already created in Matlab. I have not assigned anything to it.

Answer 2

[Kelly Kearney]

Perhaps you accidentally made end the name of a variable? At that line, what does

which end

return?

[Matt J]

No. It is impossible to make end the name of a variable.

[Brian]

No, I made sure I never tried assigning a variable to end.