find a values in matrix
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Tomas
am 23 Nov. 2013
Bearbeitet: dpb
am 24 Nov. 2013
I have matrix H[ 0 2.3926
2.3926 0]
I want to find value in matrix H, 2.3926 and store it in a variable A
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Azzi Abdelmalek
am 23 Nov. 2013
Maybe you are looking for the location
H=[ 0 2.3926
2.3926 0]
[ii,jj]=find(H==2.3926)
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dpb
am 23 Nov. 2013
Bearbeitet: dpb
am 23 Nov. 2013
val=2.3926;
A=H(abs(H-val)<1.e-5);
NB the "fuzzy" comparison to avoid FP precision problems
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dpb
am 23 Nov. 2013
Bearbeitet: dpb
am 24 Nov. 2013
Not sure what the question is, precisely. Of course the comparison can be any value or range of values. There are times when owing to FP rounding find(x==val) won't return what is naively expected.
You can always write
A=H(H==2.3926);
and for some cases you'll find joy, in others "not so much"
Look up "logical addressing" in the documentation for more detail of how this works.
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