Mapping values of two different-length vectors to index-vector

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Shelli255
Shelli255 2018-11-26
评论： Shelli255 2018-11-26
Hello,
I didn't know how to put my problem into a good google search... I could not find anything appropriate.
What I want to do is I have two vectors
a = [0 .07 .14 .21 .28 .35 .42 .5]
b = [0 .1 .2 .3 .4 .5]
I want to compare a and b in a way that I get an Index vector which would say that a(1) is between b(1) and b(2), i.e. this index would return i(1) = 1 because a(1) is between b(1) and b(2). For the next element in a it would return i(2) = 1, because a(2) is between b(1) and b(2). For a(3) it would return i(3) = 2, because a(3) is between b(2) and b(3), etc. How can i achieve this? Thank you in advance!
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KALYAN ACHARJYA
KALYAN ACHARJYA 2018-11-26
Ohh sorry your question is different, I did not read the second part.
But the logic is not clear for me..
i(1) = 1 because a(1) is between b(1) and b(2)
i(2) = 1, because a(2) is between b(1) and b(2)
i(3) = 2, because a(3) is between b(2) and b(3)...??.Here i(3)=2 and here b(2) and b(3)....in privious case b(1) abd b(2)

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Stephen23
Stephen23 2018-11-26
编辑：Stephen23 2018-11-26
>> [~,X] = histc(a,b)
X =
1 1 2 3 3 4 5 6

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