How to extract array subset
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I'm trying to extract an array subset falling into the range from a very large array. The range from Low to High were from user input and the array was loaded from a data file. so the range may not be covered in the data file. the data file is ususally very large, so i don't want to use for loop to cycle through the data set. say for example, I want to pull out the subset from WaveLength that is between Low_WL and High_WL. following is just an example. the range could be anythng like, (500, 4000), (3000, 5000) etc. the data set is a 1X10 cell array with C{3} being the wavelength. I want to save all the fields of cells(C{1} to C{10}) with wavelength falling in range selected to a subset .
pseudo code:
%%wavelength range from user input
WL_low = 2000.0;
WL_High = 2200;
%% declare data structure to store data
DS = struct('mol','name','dt',{{1 2 3 4 5 6 7 8 9 10}});
DS(1:39,1)=DS;
%%Number of molecules selected = 4
for k = 1:4
fid = fopen(sprintf('hit_%d.txt',k));
C = textscan(fid,'%1d%1d%f%f%f%f%f%f%f%f');
%% where C{3} is the cell storing the wavelenth data
%% I want to select the data that falls within the wavelength range and
%% store them to structure if it is not empty
C subset = if C{3} is in range
DS(k).dt = C subset;
end
Any suggestions are highly appreciated! Chong
1 个评论
Azzi Abdelmalek
2013-8-23
This is not clear, give a short example with expected result
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Azzi Abdelmalek
2013-8-23
WaveLength(WaveLength>=Low_WL & WaveLength<=High_WL)
5 个评论
Azzi Abdelmalek
2013-8-23
[Chong commented]
Thank you Azzi, I guess I oversimplied my problem. I'll edit my Q.
Azzi Abdelmalek
2013-8-23
编辑：Azzi Abdelmalek
2013-8-23
Chong, if you want to add a comment, click on comment on this anser.
Azzi Abdelmalek
2013-8-23
[Chong commented]
Azzi,
your answer works perfect for the array, C{3}. but how can I apply the selection to other fields in the cell? Thanks,
Azzi Abdelmalek
2013-8-23
What do you mean by field?
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