How to change char array matrix to numerical matrix in gui

function testerror_Callback(hObject, eventdata, handles) C1_Callback(@C1_Callback, eventdata, handles); C2_Callback(@C2_Callback, eventdata, handles); C3_Callback(@C3_Callback, eventdata, handles); a=get(handles.answer_C1,'String') b=get(handles.answer_C2,'String') c=get(handles.answer_C3,'String')

This answer from command window c =

4×8 char array

    '0.15625 '
    '-2.28125'
    '8.59375 '
    '-2.46875'

I want to make it numeric, the number from (1,1) to (1,4) using to calculate another formula

Answer 1

[Ameer Hamza]

Try str2num()

c = [
    '0.15625 '
    '-2.28125'
    '8.59375 '
    '-2.46875'];
x = str2num(c)

Result

>> x
x =
    0.1562
   -2.2812
    8.5938
   -2.4688

[Isma Adlin Ad]

C cannot changed because it is from command window and the value C extract from callback function, i have tried this X = str2num(c) The value is Nan