dbhole.mat contains 334 files and each file contains data of[2xn]. I want that how many 'h'(i.e h1,h2 etc) are in each 'd' (i.e d1,d2, etc)

for example, for d1, it has total 20h(d1h1,d1h2...d1h20). how to index out all the'h'in d1,d2...d14

[Walter Roberson]

Duplicates earlier http://www.mathworks.com/matlabcentral/answers/293159-dbhole-mat-contains-334-files-each-files-consists-of-2xn-data-i-sort-these-files-with-name-start . Please hold the discussion there in the original post.

Answer 1

[Andrei Bobrov]

clear
load dbhole

a = whos;
n0 = {a.name}';
x = regexp(n0,'\d*','match');
x = x(~cellfun(@isempty,x));
x = cat(1,x{:});
z = sortrows(str2double(x));

[aa,~,c] = unique(z(:,1));
out = [aa, accumarray(c,1)];

Answer 2

[Stalin Samuel]

Below approach may solve your problem

load dbhole
nfile = struct2cell(whos)
ret = nfile(1,1:end)

Refer regexp which will be useful for you

[MUKESH VIKRAM]

Sir, i have to count the number of h contained in 'd'