construc a string from other strings and variables

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Jeff Eriksen
Jeff Eriksen 2014-2-10
编辑： per isakson 2014-2-11
I am just trying to construct a single string to use as a file name, from several other strings and variables. Should be simple, but I cannot get the syntax right. For example:
subj = 'A2';
ndip = '2503';
nroi = '68';
band = '2-4';
fil_nam = [subj '_b' band '_d' ndip '_s' nroi];
fil_nam is created as a cell array, so how do I force it to be a string? Or convert to string?
Thanks

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-2-10
If fil_nam is a cell array
fil_nam = {subj '_b' band '_d' ndip '_s' nroi}
out=strjoin(fil_nam)
  2 个评论
Walter Roberson
Walter Roberson 2014-2-10
strjoin() puts a space between the parts by default. You can specify '' as the delimiter to avoid the space. If you are going to do that then you might as well use
out = cat(2, fil_name{:});

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per isakson
per isakson 2014-2-10
编辑：per isakson 2014-2-11
I find sprintf to be the best function to combine fixed strings and values of string (and numeric) variables into one string. Thus,
sprintf( '%s_b%s_d%s_s%s', subj, band, ndip, nroi )
returns
ans =
A2_b2-4_d2503_s68

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