how can i solve it
2 views (last 30 days)
Show older comments
i=1:100;
vx_1(i)=(X1(i)-X1((i)-1))/(t(i)-t((i)-1)); % In general
vx_1(1)= (X1(1)-X1(N-1))/(t(N)-t(N-1)); % for i=1
I get the error: Array indices must be positive integers or logical values.
How can I solve it
it works well when you put i= single digit but does not work for array? eg it works well when i=6
Accepted Answer
Walter Roberson
on 18 Aug 2021
When i is 1 then i-1 is 0, and you would be referring to X1(0) and t(0) .
MATLAB cannot use index 0.
See my discussion in https://www.mathworks.com/matlabcentral/answers/1413192-z-must-be-a-matrix-not-a-scalar-or-vector#comment_1693702 for what needs to be done.
0 Comments
More Answers (0)
See Also
Categories
Find more on Matrices and Arrays in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!