HOW TO WRITE SUMMATION FORM ∑_(i=1) (L-1)

LOWER LIMIT IS i=0, upper limit is L-1(L=256)

Answer 1

[Laurent]

Make an appropriate vector with the values that you want to sum (or select the values from an array containing them) and use the command 'sum'.

Answer 2

[Matt J]

Are you trying to sum the first 256 elements of an array? If so, you would do as follows

   sum(x(1:256))

Or, if length(x) is 256, then you would just do

   sum(x)