concatenating string variable names and passing on values of a matrix in a for loop
6 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi there,
I have many files, for each file I create variable names with part of the filename (using for loop and counter the filecounter) and then, I pass on to them the values of a matrix (AWFR) I create for each iteration, using eval()
The problem is that I want to concatenate all these column - vector variables into one large column vector, without having to type the names manually all over again, after these are saved in the workspace.
I managed to create a matrix containing all the names of the variables (AWFRallthenames), but I couldn't pass on the values with eval([AWFRallthenames(filecounter,:),'=AWFR']).
Is there any other way and why the above does not work? I am attaching a part of the code if that helps!!
Any help appreciated! Thank you
for filecounter=1:2%length(FileList)
.......
datehour=BasicName(end-12:end)
onoma1='AWFR'
onoma2=datehour
AWFRname=horzcat(onoma1,onoma2)
% matrix allthenames keeps all the AWFR names (every hour,
%every .xdat file), in integer values
allthenames(filecounter,:)=char(AWFRname)
%and this converts the integer values to a string
AWFRallthenames=char(allthenames)
%Now create the AWFR matrix. NO stimulation intervals included.
AWFR = zeros(nBins, 1);
for n=1:nBins
index_ofeach_bin=find( (Ts>(n-1)*(Fs*60*BinSize)) & (Ts<=n*(Fs*60*BinSize)))
AWFR(n)=length(index_ofeach_bin)
end
%now I pass on the values to the string name I have created before (AWFRname)
%eval([AWFRname,'=AWFR'])
%now I pass on the values of the string name I have created before, and
%rests in a row of the AWFRallthenames matrix
eval([AWFRallthenames(filecounter,:),'=AWFR'])
3 Kommentare
dpb
am 8 Mai 2014
...for each file I create variable names ... then, I pass on to them the values of a matrix ... using eval()
See
Akzeptierte Antwort
Roberto
am 8 Mai 2014
Creating variable names via EVAL function is highly NOT RECOMMENDED. Try to use a different philosophy... try this for example:
% create your 'myVar' structure with all contents to store:
for fCounter = 1 : totalFiles
myVar(fCounter).datehour = BasicName(end-12:end) ;
myVar(fCounter).onoma1 = 'AWFR' ;
myVar(fCounter).onoma2 = myVar(fCounter).datehour ;
myVar(fCounter).AWFRname = horzcat(myVar(fCounter).onoma1,myVar(fCounter).onoma2) ;
myVar(fCounter).AWFR = zeros(nBins, 1);
for n=1:nBins
index_ofeach_bin = find( (Ts>(n-1)*(Fs*60*BinSize)) & (Ts<=n*(Fs*60*BinSize)));
myVar(fCounter).AWFR(n) = length(index_ofeach_bin);
end
end
% Process all elements
for i = 1 : numel(myVar)
disp(['AWFR name: ' myVar(i).AWFRname]);
disp(myVar(i).AWFR);
end
% then you can save only one variable to workspace
save('myfile.mat','myVar');
In case you want to learn how to filter structures, to get just one element, have a good look in to this amazing video tutorial. Good luck!
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Characters and Strings finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!