Sorting a cell of strings using a certain character position

Question

Paramonte 2019-2-22

评论： Paramonte 2019-2-25

Dear all

I have a variable called var=

vart=[{'Ice011_L_3of3m.mat''}; {'Ice011_P_1of3m.mat'} ;{'Ice011_P_2of3m.mat'}]

We would need to sort the strings in the cell array using the 10th character of each string, so we would get the following result

var_sorted =[{'Ice011_P_1of3m.mat'}; {'Ice011_P_2of3m.mat'} ;{'Ice011_L_3of3m.mat'}]

Many thanks in advance

paramonte

Answer 1

Stephen23 2019-2-22

编辑：Stephen23 2019-2-22

Simpler in two lines:

vart = {'Ice011_L_3of3m.mat';'Ice011_P_1of3m.mat';'Ice011_P_2of3m.mat'}
[~,idx] = sort(cellfun(@(v)v(10),vart));
vart = vart(idx)

If you need to match more than one digit you could use a regular expression, e.g.:

[~,idx,] = sort(str2double(regexp(vart,'(?<=_)\d+','match','once')));

Paramonte 2019-2-25

Thanks a lot for your time.

This has worked perfectely