convert string with digits to double

Hello,

I want to convert the following cells to double values;

'12:57:33'  '36.6'  '0.857101'
'12:57:51'  '37.0'  '0.891594'
'12:58:37'  '37.7'  '0.898841'
'12:59:49'  '38.8'  '0.893043'

str2double does not seem to work...Can anybody help me? Thanks in advance!

Answer 1

[Azzi Abdelmalek]

v={'12:57:33'  '36.6'  '0.857101'
'12:57:51'  '37.0'  '0.891594'
'12:58:37'  '37.7'  '0.898841'
'12:59:49'  '38.8'  '0.893043'}
out=[datenum(v(:,1)) str2double(v(:,2:3))]