I just need to get the numbers from this vector. The result must be a double. I need fast and clean code, as this operation is performed over and over again in my code.

vector = {'G07'} {'G23'} {'G04'} {'G08'} {'G20'} {'G13'} {'G30'}

This code below is my code but it is slow when running too many times.

PRN = vector;

PRN = char(PRN);

PRN = PRN(:,2:end);

PRN = str2num(PRN);

Answer 1

[Mathieu NOE]

hello

try this alternative :

vector = [{'G07'} {'G23'} {'G04'} {'G08'} {'G20'} {'G13'} {'G30'}];

% Calling the regexp() function over the above cell array to extract number part
B = regexp(vector,'\d+(\.)?(\d+)?','match');
  
% Calling the str2double() function to convert the text to double-precision values
out = str2double([B{:}])

[Clodoaldo de Souza Faria Júnior]

It works, but it's not that much faster.

Answer 2

[Stephen23]

Fastest:

C = {'G07','G23','G04','G08','G20','G13','G30'};
V = sscanf(sprintf('%s',C{:}),'G%f')

V = 7×1

7 23 4 8 20 13 30