Adding elements from a stuck to an array

Hello !

I have a struct lets say with 2 list one has some values and the other characterize this values i.e some values belong to group1 some to group 2 etc. the values that are in the 1st group correspond to the number 2 in the second list. I want to take the values from the 1st list that belong lets say to group 2 and add them to an array WITHOUT a for loop.

Can this achieved ?

I manage to do it with a for loop and a if but i had to speed up the script.

Thank you for your time !

Answer 1

[Dave B]

This might be easier to answer if you provided some example code, as it's a little difficult to follow your description. The ideal would be if you could produce a simple struct that with a few values that demonstrated your problem.

Here's my best guess based on your description:

mystruct=struct('vals', [1 2 3 4 5], 'cats', [1 2 1 2 1])

mystruct = struct with fields:
    vals: [1 2 3 4 5]
    cats: [1 2 1 2 1]

group1 = mystruct.vals(mystruct.cats==1)

group1 = 1×3

1 3 5

group2 = mystruct.vals(mystruct.cats==2)

group2 = 1×2

2 4

[Konstantinos Moulakis]

That helped thank you !