How to assign value in an array depending on the index stated in another array
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Hi all,
After performing some processing, now the variable 'a' contains [2 5 9].
Let say i have another variable 'b', variable 'b' is pre-initialized to be zero depending on a length of input, let say 10. b = [0 0 0 0 0 0 0 0 0 0];
What I want is, the elements that are stated in variable 'a' should be set ONE in variable 'b'. b= [0 1 0 0 1 0 0 0 1 0]
How could I do this in Matlab? Appreciate any idea, thanks
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Jos (10584)
2014 年 2 月 17 日
Welcome to the world of indexing!
Your problem:
a = [2 5 9]
b = [0 0 0 0 0 0 0 0 0 0];
b(a) = 1
Other interesting indexing things:
a = [1 3 7]
b = [0 0 0 ];
b(a) = 1 % automatic expansion of b
a = [2 2 2 2]
b = [0 0 0 0]
b(a) = 1 % no adding up ...
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