Eliminate string from vector

Hi, i created a vector containing 963 nc file. The problem is that some of them are the same but from two different version and i want to delete the previous version. For example, how can i eliminate row 844, 846 and 848 from my vector? Thanks all

Answer 1

[Image Analyst]

You say "For example from c_gls to S1CSAR" so basically up until the last underline. Don't include _V and anything after that. This will do it:

% Create sample data
ca = {...
	'c_gls_SSM1km_202007310000_CEURO_S1CSAR_V1.1.1.NC';...
	'c_gls_SSM1km_202007310000_CEURO_S1CSAR_V1.1.2.NC';...
	'c_gls_SSM1km_202008040000_CEURO_S1CSAR_V1.1.1.NC';...
	'c_gls_SSM1km_202008040000_CEURO_S1CSAR_V1.1.2.NC';...
	'c_gls_SSM1km_202008050000_CEURO_S1CSAR_V1.1.1.NC';...
	'c_gls_SSM1km_202008050000_CEURO_S1CSAR_V1.1.2.NC'}
% Loop over each cell replacing it with the contents
% but only until the last underline.
for k = 1 : length(ca)
	underlineIndexes = find(ca{k} == '_');
	% Take up until the last underline
	ca{k} = ca{k}(1:underlineIndexes(end) - 1);
end
ca = unique(ca) % Get unique and show results in command window.

You get

ca =

3×1 cell array

{'c_gls_SSM1km_202007310000_CEURO_S1CSAR'}

{'c_gls_SSM1km_202008040000_CEURO_S1CSAR'}

{'c_gls_SSM1km_202008050000_CEURO_S1CSAR'}

Is that what you want?

If you know that the last underline is always in the same location, you could simplify it to be

for k = 1 : length(ca)
	ca{k} = ca{k}(1:38); % Extract the first 38 characters of the kth cell.
end

OK, 3 lines instead of 1 for the regexp() way, but you might find this more intuitive and less cryptic.

[Giacomo Abrardo]

thank you so much. that's work

Answer 2

[Image Analyst]

Did you try the unique() function? It has lots of options so be sure you understand which options to use.

If you need more help, attach your cell array in a .mat file with the paperclip icon.

[Giacomo Abrardo]

It could be the solution, but the name is not exactly the same cause at the end i have v1.1.1 and v1.1.2. There is a way to consider the strings without the last part of the letters? For example from c_gls to S1CSAR. Thank you very much