Comparing value in m x n matrices to find its index
2 views (last 30 days)
Show older comments
Hi, I have one set of data that I need to compare it with different size of data. So, as it stated in this code below, the threshold will be 3, 3.5, 4, 4.5 ..... I have to compare each threshold with all available data in variable GtrecMRCG2 then get its index. after all data compared, I need to check it with remaining threshold in variable thresholdVAR.
I wrote this based on my understanding. but it doesn't work because the dimension is mismatched. Thank you so much and big appreciation to those who want to give me advises. :)
threshold = 3;
thresholdVAR=[threshold 0 0 0 0 0 0 0 0];
GtrecMRCG2= [ 5 8 9 6 2 5 2 4 6 3 8 9 11];
for ii=1:9
thresholdVAR(ii+1:end)= thresholdVAR(ii)+ 0.5;
end
for idxm=1:length(thresholdVAR)
for idxn = 1:length(GtrecMRCG2)
idxalarmMRCG (1:length(thresholdVAR),1:length(GtrecMRCG2))= find(GtrecMRCG2(idxm,idxn)>=thresholdVAR(idxm,idxn));
end
end
4 Comments
CS Researcher
on 1 May 2016
Not exactly sure what you are trying to achieve but you should see the line with the code:
find( thresholdVAR(idxm:sza(1),idxn:sza(2)) < GtrecMRCG2(1:sza(1),1:sza(2)));
Your thresholdVAR and GtrecMRCG2 are not 2D matrices. They both are 1D vectors.
Also, you don't need a loop to initialize the thresholdVAR. You can just do this:
thresholdVAR = 3:0.5:7;
Accepted Answer
Ilham Hardy
on 2 May 2016
Something like this?
thresholdVAR = 3:0.5:7;
GtrecMRCG2= [ 5 8 9 6 2 5 2 4 6 3 8 9 11];
% preallocate
DesMat = zeros(length(thresholdVAR),length(GtrecMRCG2));
for oneL = 1:length(thresholdVAR)
[r,c,v] = find(GtrecMRCG2>thresholdVAR(oneL));
DesMat(oneL,c) = GtrecMRCG2(c);
end
More Answers (0)
See Also
Categories
Find more on Matrix Indexing in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!