Converting string array to float array

Question

Ankita Tondwalkar on 27 Mar 2022

Edited: Stephen23 on 27 Mar 2022

I have a string array of the format

"[1,1]"

"[2,1]"

"[3,1]"

How can you convert into double array?

Answer 1

Stephen23 on 27 Mar 2022

Edited: Stephen23 on 27 Mar 2022

S = ["[1,1]";"[2,1]";"[3,1]"]
S = 3×1 string array
    "[1,1]"
    "[2,1]"
    "[3,1]"

Method 1:

M = sscanf(join(S,''),'[%f,%f]',[2,Inf]).'
M = 3×2
     1     1
     2     1
     3     1

Method 2:

M = cell2mat(arrayfun(@str2num,S,'uni',0))
M = 3×2
     1     1
     2     1
     3     1

Method 3:

M = reshape(str2double(regexp(join(S),'\d+','match')),2,[]).'
M = 3×2
     1     1
     2     1
     3     1