How to combine data from two columns into a single column?

2017 9 8
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I have a variable called "time" = which contains the time of something but it's in 2 columns i.e time=[15,31] (this is hours and minutes, so the time is 3:31). I want to create a variable that compresses this, so time would be 15.31 in a single column, how would I do this?

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KSSV
KSSV 2017-9-8

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time = [10 1; 14 3 ; 15 6] ;
str = repmat('.',size(time,1),1) ;
iwant = str2num([num2str(time(:,1)),str, num2str(time(:,2))])

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