How to check the numbers of characters of a string?

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Ze Kai Ng
Ze Kai Ng 2012-10-31
e.g I have a string, abcde. And I need a checker to check whether the string has 5 characters before executing a command.

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采纳的回答

Pedro Villena
Pedro Villena 2012-10-31
编辑：Pedro Villena 2012-10-31
str = num2str([17;10],'%05i')
if length(str(1,:))==5,
%%%here is your command
end
or
str = num2str([17;10],'%05i')
if numel(str(1,:))==5,
%%%here is your command
end
  3 个评论
显示 1更早的评论
Matt Fig
Matt Fig 2012-10-31
Better to use NUMEL, for generality.
S = ['ertyu';'poiuy';'lkjhg';'nbvcx']
length(S)
numel(S)

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更多回答（4 个）

Sean de Wolski
Sean de Wolski 2012-10-31
Pedro's code with numel as the size check:
numel(str)==5
manoj saini
manoj saini 2012-10-31
>>a='string'; >>n=length(a) so n will return length of a string
Ze Kai Ng
Ze Kai Ng 2012-10-31
I converted my string into vector form and cannot count using length(str).
Ze Kai Ng
Ze Kai Ng 2012-10-31
Thank you everybody! I figured it out. I need to char(vec(pos)) first to convert to string then I can compare with the above methods.

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