How to calculate the sum of particular row in a matrix??
6 views (last 30 days)
Show older comments
Bibek Dhami
on 28 Jul 2020
Commented: Star Strider
on 28 Jul 2020
I have a large matrix A with the dimension 1024 X 256. I want to add the elements of the 104th row from column 25 to 75. I tried this code but it doesn't work. Can someone please guide me on this?
B= sum(A(104, 25:75)
0 Comments
Accepted Answer
Star Strider
on 28 Jul 2020
To sum across a row, specify dimension 2:
B= sum(A(104, 25:75),2)
That should do what you want.
8 Comments
Star Strider
on 28 Jul 2020
I understand.
The problem is that my ability to help you with the file problem is significantly limited. That is the reason that I encourage you to determine what is in ‘F’ before the loop and in each iteratiion, and what is in ‘file’ in each iteration. You simply need to list ‘F’ to determine what it is, and list every value of ‘F(i).name’, at least for the first few (perhaps 10) iterations, until the first loop works as you want it to work. One way to determine what is in ‘file’ is to use the size and nnz functions to see what is in it.
More Answers (0)
See Also
Categories
Find more on Numeric Types 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!