count elements falling within certain thresholds in array in matlab?

Question

I have a huge vector. I have to count values falling within certain ranges. the ranges are like 0-10, 10-20 etc. I have to count the number of values which fall in certain rang

Answer 1

You can use logical indexing. Observe:

>> x = randi(40, 1, 10) - 20
x =
  -2    17   -12    -9   -14   -14    15     4     2   -14
>> x2 = x(0 < x & x < 10)
x2 =
   4     2
>> length(x2)
ans =
    2

and the same done in one step:

>> length(x(0 < x & x < 10))
ans =
    2