String parsing with a delimiter

Hello, I’m having a little problem parsing a string using a delimiter. It leave the delimiter attached to my string. Here’s my code:

str = ‘counter=10;count=7;’;

[token, remain] = strtok(str, '=');

switch token
    case 'counter'
        [token1, remain1] = strtok(remain, ';');
        counter = str2double(token1);
end

token comes out right but remain has the value of “=10;count=7;” so when I do my next strtok my token1 has a value of “=10”’. Is there any way to parse to a delimiter and remove it from my string in matlab? Thanks.

Answer 1

[Matt Kindig]

To expand upon that, you can do something like this to loop through the entire string.

str = 'counter=10;count=7';
parts = regexp( str, '(?<arg>\w+)=(?<val>\d+);', 'names');
for k=1:length(parts),
    arg = parts(k).arg;
    switch arg,
         case 'counter',
             counter = str2double(parts(k).val);
         case 'count',   
             %do something else.
         %add additional cases as necessary.
    end
end

[Matt Kindig]

Glad I could be of assistance. Regular expressions are super-powerful once you learn them. I highly recommend looking them up in the Matlab help.

Answer 2

[Matt Kindig]

What is your desired output? You might be able to do this easier with regular expressions.

doc regexp