Replace vector of idexes with values from another vector corresponding to those indexes
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I have:
a = [1 1 2 2 2 3]
b = [9 8 7]
I need :
c = [9 9 8 8 8 7]
I can do this with a loop, but I am looking for a more effecint way. I have a vector that is 1x150000 that I need to do this for.
Thank you!
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David Goodmanson
2019 年 5 月 17 日
Hi Nate,
c = b(a) gets it done. a becomes an index vector into the elements of b.
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