Matlab - Sum of array columns

0
votes

I'd like to calculate the sum of a columns in a Matrix in Matlab and assign the value to another Matrix without a for loop (as I will be needed to do lots of these with little variations in the sum formula and writing for-loops for each of these would be silly).

Here is what I have so far: finalmatrix= [ symsum((sample1Prime(i)-sample1(i))^2, i, 1, 10); ]

Note this would be one index of the final matrix.

I keep getting an error saying symsum is invalid for arguments of type double.. And a quick Google search tells me that it cannot be used for non-symbolic expressions. But no further solutions are given that meet my requirements.

Essentially what I'm trying to calculate is: The sum from i = 1 to 10 of sample1Prime(i)-sample1(i))^2 where sample1Prime and sample1 are 10x1 Matrices.

Anyone have any ideas?

Thanks.

1
matlabmathmatrixsumseries
Why are you not using sum since your variables do not seem to be symbolic ? - High Performance Mark
Yes that is why I stated my error. symsum was my initial try and sum doesn't seem to fit my needs. I need to sum every first, second, third....., n row of (sample1Prime-sample1)^2. - Travv92

1 Answers

2
votes

If you need the cumulative sum:

cumsum(sample1Prime-sample1.^2)

If you only need the final sum:

sum(sample1Prime-sample1.^2)