Indexing Vector of Variables
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I have a column vector of numbers (we'll call it A for example). Is there a slick way to go through A and create another column vector (B) of indices? In other words, if a number in A falls in the range of 0-0.1, it will be binned (i.e., indexed) as 1 in B. If a number in A falls in the range of 0.1-0.2, it will be indexed as 2 in B. If a number in A falls in the range of 0.2-0.3, it will be indexed as 3 in B. And so on. Vector B will then serve as my Indexing vector to allocate each number of A to a certain "bin." I'm sure I could write a FOR and/or IF statement to accomplish this. But for the sake of efficiency, I wanted to ask if there was a more efficient and easier way.
Thanks,
M Ridzon
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Stephen23
2017-11-15
编辑:Stephen23
2017-11-15
That is what the histogram functions do very easily and efficiently:
or
or
etc.
Here is an example:
>> V = rand(1,10)
V =
0.8093 0.0174 0.3329 0.4669 0.5331 0.1471 0.9760 0.3909 0.4499 0.3305
>> B = 0:0.1:1; % bin edges
>> [~,idx] = histc(V,B)
idx =
9 1 4 5 6 2 10 4 5 4
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Stephen23
2017-11-15
@Matthew: did you read the discretize help? It clearly explains how the data are allocated to the bins.
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