Hello!
 
I have a problem making a new variabel in a dataframe that consists of a time difference.
 

It seems that the new variable gets into the dataframe but I cant look at it anymoore.
 
Here is what hapens.
 
> tdiff<- difftime(Kontrolltid, Starttid, units="auto")> tdiffTime differences in mins [1] 168  NA  NA 165 175 140 191 195 130 160 135 165 330 178 141  NA 119  90  70[20]  99 115  70  65  90  90  65  90  75  85  93  52  75  60  90 105  70  65  60[39]  85 110  65  60  98  62  71  61  41  80  67  83  72  73attr(,"tzone")[1] ""
 
> givnona<- data.frame(givnona, tdiff)
 
names(givnona) [1] "Vanna"       "Datum"       "Starttid"    "Kontrolltid" "Zo.Höger"    [6] "Zo.Vänster"  "Mm.Höger"    "Mm.Vänster"  "tot.zo"      "tot.mm"     [11] "tdiff"   
 fix(givnona)Error in edit.data.frame(get(subx, envir = parent), title = subx, ...) :   can only handle vector and factor elements
 
 
 
tdiff <-structure(c(168, NA, NA, 165, 175, 140, 191, 195, 130, 160, 135, 165, 330, 178, 141, NA, 119, 90, 70, 99, 115, 70, 65, 90, 90, 65, 90, 75, 85, 93, 52, 75, 60, 90, 105, 70, 65, 60, 85, 110, 65, 60, 98, 62, 71, 61, 41, 80, 67, 83, 72, 73), tzone = "", units = "mins", class = "difftime")> 
 
Any solution?
cheers
/Jojje
 
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