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what str2num will perform?

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Shan Sha
Shan Sha 2018-11-13
评论： Rik 2018-11-13
fid = fopen(txtfile,'r');
tline = fgetl(fid);
index = findstr(tline,'.');
i = i+1;
filenames(i) = str2num(tline(1:index-1))+1;
what is the function of str2num here? I am not getting clear with the mathwork help. Can anyone explain in brief?
  2 个评论
Adam
Adam 2018-11-13
编辑：Adam 2018-11-13
It converts a string to a number, if such a conversion makes sense.
You can just try it on your command line, e.g.
str2num( '17' )
Surely
doc str2num
is fairly clear though?! It gives clear examples.
Rik
Rik 2018-11-13
As the documentation mentions, str2num uses eval and might thus have unintended side effects, which you can avoid by using str2double. In most cases these two functions should be equivalent.

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