I have a variable "F" where i have 6-7 charcters , now my questions are: * 1 how i can cheack how long is this string? * 2 now if it have 7 characters then i want to: * for characters in position 1-3 if charcter=0 chacnge it into O , and for position 3-7 if charcter=O change it into 0, * * how can i do that?

strings operations, how long is string, changing specific strings

2015 1 11

1 个回答

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I have a variable "F" where i have 6-7 charcters , now my questions are:

1 how i can cheack how long is this string?
2 now if it have 7 characters then i want to:
for characters in position 1-3 if charcter=0 chacnge it into O , and for position 3-7 if charcter=O change it into 0,
how can i do that?

Stephen23 2015-1-11

编辑：Stephen23 2015-1-11

0 个投票

Try this:

F = '000OOOO';
if numel(F)==7
    F(1:3) = strrep(F(1:3),'0','O');
    F(4:7) = strrep(F(4:7),'O','0');
end

I assumed that you meant your second range to start from 4.

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