How to replace values in a matrix with another set of values

Hi,

I have a 91282 x 1 matrix and I want to replace the specific values 59688:60003 (n=315) with another set of 315 numbers (a 315 x 1 matrix) in those exact places. What is the best way of doing this? Thanks!

[Jan]

Do you mean the values 59688:60003, or are these the indices of the values you want to replace?

[bsriv]

Sorry, yeah I meant the indices

Answer 1

[Image Analyst]

Try this

% Stuff sourceVector into indexes 59688:60003 of targetVector
targetVector(59688:60003) = sourceVector;

[bsriv]

Yeah that was the first thing I tried but I (expectedly) get "In an assignment A(:) = B, the number of elements in A and B must be the same." because "A" is 91282x1 and B is 315x1. I've been searching tirelessly and can't find a workaround to what should be a simple solution!

[Jan]

@bsriv: Note that 59688:60003 has 316 elements, not 315. So if you want to insert 315 elements starting from element 59688:

len = numel(sourceVector);
targetVector(59688:(59688 + len - 1)) = sourceVector;
%                               ^^^  essential!

[bsriv]

Got it... thanks!

Answer 2

[Image Analyst]

You can use the intlut() function.