for loop returns NaN
2 views (last 30 days)
Show older comments
negin tebyani
on 10 Feb 2018
Answered: Walter Roberson
on 10 Feb 2018
I am trying to do this in my code:
for i=1:c+1
load(row) = load(row)+(ro(row,i)* MinRateCurrentUserRRH(row,i))/(log(1+SINR(row,i)));
end
ro is a matrix of 1 and 0 s and MinRateCurrentUserRRH and SINR s are other matrixes. before running the for loop, load (row) is fine and for example 0.3, after first loop, it turns to NaN, so it gives errors, I can't figure out the problem. can anyone help me with it?
3 Comments
dpb
on 10 Feb 2018
As other poster says, nothing anybody here can do without actual data but you've got all the information you need; just use the debugger and see where your logic fails.
While not the specific problem, you can probably replace all the loops with Matlab array operations; "the MATLAB way". Look at the "dot" operators under
>> help punct
Punctuation.
. Decimal point. 325/100, 3.25 and .325e1 are all the same.
. Array operations. Element-by-element multiplicative operations
are obtained using .* , .^ , ./ , .\ or .'. For example,
C = A ./ B is the matrix with elements c(i,j) = a(i,j)/b(i,j).
...
Accepted Answer
Walter Roberson
on 10 Feb 2018
Your row is a vector, so (log(1+SINR(row,i)) is a vector, so your / operator is mrdivide, the matrix right division operator, with A/B being approximately equivalent to A * pinv(B) where the * indicates mtimes, the algebraic matrix multiplication operator. For vector row you need the ./ operator instead of /
You will also need to watch out for the * operator earlier in the line: you probably want it to be .*
0 Comments
More Answers (0)
See Also
Categories
Find more on Creating and Concatenating Matrices 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!