How to get numbers from char array?

I have an array of characters that are produced from a fitSVMposterior

'@(S)sigmoid(S,-1.588276e+00,-2.598747e-01)'

I need to access the numbers in this array but don't know how.

Might anyone know how to do so?

Thanks

Answer 1

[Adam Danz]

Assuming your string is named, str,

str = '@(S)sigmoid(S,-1.588276e+00,-2.598747e-01)'; 
numstr = regexp(str,'(-)?\d+(\.\d+)?(e(-|+)\d+)?','match')

% numstr =
%   1×2 cell array
%     {'-1.588276e+00'}    {'-2.598747e-01'}

to convert to double,

 num = str2double(numstr)
 
%  num =
%       -1.5883     -0.25987

[David Mabwa]

Worked like a charm. Thank you very much!

Answer 2

[Shae Morgan]

str2double(char_array)

[Adam Danz]

This will not work when non-numeric values are in the character array.

Otherwise, when the string contains only a numeric representation, this is a good solution.

[Shae Morgan]

excellent point!

better solution below