Convert string to time

One variable contains values (1.30 - one hour and thirty minutes, 1.2
(which is supposed to be 1.20 - one hour and twenty minutes)). I would
like to convert to a minute variable so 1.2 is converted to 80
minutes. How?

You could make a simple little function that does the following

timeconv <- function(time){
    newtime <- floor(time)*60 + (time-floor(time))*100
    return(newtime)
}

floor(1.2)*60 + (1.2-floor(1.2))*100

[1] 80

floor(1.4)*60 + (1.4-floor(1.4))*100

[1] 100

floor(1.3)*60 + (1.3-floor(1.3))*100

[1] 90

Phil

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