index an array with arrays
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I have two index arrays i1 and i2 and a data array data.
I want to set the areas of data in the following way:
data([i1(1):i2(1), i1(2):i2(2)]) = ... % and so on
Is there a way to do that fast without loops? It can be achieved via
for i=1:length(d1)
data(d1(i):d2(i)) = 1.0;
end
3 个评论
Kevin Phung
2019-3-29
can you be more clear in what you are trying to do? maybe give an example
James Tursa
2019-3-29
How many dimensions does "data" have? Could that vary?
Christian Hufnagel
2019-3-29
采纳的回答
James Tursa
2019-3-29
I'm still not exactly sure what you are trying to do, but If data is 1D and you want to set all values between the indexes to some common value as your example seems to indicate, then you could simply build an index vector to use. E.g.,
x = cell2mat(arrayfun( @(i1,i2)i1:i2, i1, i2, 'uni', false ));
data(x) = 1.0;
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