Adding elements from a stuck to an array

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Konstantinos Moulakis
评论： Konstantinos Moulakis 2021-10-11
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 !

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Dave B
Dave B 2021-10-8
Ran in:
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

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