logical indexing between two varaibles

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Rami Ahmad
Rami Ahmad on 28 Apr 2015
Commented: Jan on 28 Apr 2015
I have these variables
i = i=3.02:0.00008:3.098;
j= 3.020005:0.00008:3.098005;
and a numerical array of 1000000x10. I want to determine in specific columns where the values of merged are between those of i and j, so in the first case I am trying to determine if the value is anything between 3.02 and 3.020005. I have tried some logical indexing where I used
index = (merged(merged(:,3) > i & merged(:,3) < j));
This however only seems to work if my numerical array is of the same dimensions as i and j which in this case would be 976x10. Any ideas how else to go about this to use logical indexing but with a numerical array of a larger size?
  6 Comments
Rami Ahmad
Rami Ahmad on 28 Apr 2015
The idea of using the index approach is that if the value in merged is between i(1) and j(1) I will then have a logical array where I can then exclude the results that lie between these numbers. I don't need to know which ones meet the conditions for each value of i and j but the total logical array so I can say that I have checked between all of the respective values of i and j together and determined if any fall within those boundaries. Possibly indexing is not the best way to go about this, I'm not sure what is most suitable.
Jan
Jan on 28 Apr 2015
I still do not understand, what you want to achieve. Could create a tiny example with inputs and the wanted output?

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Answers (1)

pfb
pfb on 28 Apr 2015
I'm not sure I understand your problem. It looks like some sort of binning problem.
You could try using "histc" on the columns of your matrix, using i or j (or a suitable combination thereof) to define the edges.

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