Vectorising a piece of Code

I have a matrix, mainMatrix of nan values and I also have three vectors of same length, rowVector: Stores the row Number. LeftColVector:Stores the left-column numbers. RightColVector: Stores the right-column numbers. What I need to do is something like this,

    for i=1:length(rowVector)
    mainMatrix(rowNumber(i),LeftColVector(i):RightColVector(i))= %Some values from another cell array{i}%
    end

Is there a way to vectorise this code?

Answer 1

[Image Analyst]

It's already partially vectorized, going along columns. I don't know of anyway to vectorize it with rows in a single line of code. Anyway, unless you have hundreds of millions of iterations, the for loop method you have should be very fast. Go ahead and time it and you'll see.