Matlab chokes on 'end' operator

I am trying to run a script and cannot go beyond the line that plots

% Plot the relative Position Error for an entire week after the epoch time
% of the latest ephemeris
TIME = VAL(10,end-1):60/86400:VAL(10,end)-60/86400;
P1=figure;plot(TIME(end-10079:end),POSERR);

the error I'm getting is

• _ *Subscript indices must either be real positive integers or logicals* _ *

all variables have been defined

[James Tursa]

What are the dimensions of the variables involved? Have you used the debugger to pause execution at that line to verify the variable dimensions?

Answer 1

[Image Analyst]

Looks to me like it should be okay. Try putting parentheses around "end-1" and "end-10079" and see if that fixes it. If it doesn't then set

lastTimeIndex = length(TIME);
lastValIndex = size(VAL, 2);

and then use lastTimeIndex and lastValIndex instead of end and see if that works.

Do you want parentheses around "VAL(10,end)-60/86400" or not. That's another thing to check.

[Paul]

Thank you, very much the assignment worked. I don't know why the 'end' did not, but now, after I used lastTimeIndex. it all works

[Image Analyst]

Glad it worked. Please go ahead and mark the answer as "Accepted" then.