Hi all
I wish to draw an histogram... with dates but the following append, i don't
know where is the problem, help(hist.Date) works and i don't see any usefull
information on what i'm doing wrong...
> hist.Date(dt_cycles)
Error: couldn't find function "hist.Date"
> hist.date(dt_cycles)
Error: couldn't find function "hist.date"
> cycles
[1] 7 1 2 5 14 5
> dt_cycles
dates_releves cycles
1 2005-07-01 7
2 2005-07-04 1
3 2005-07-06 2
4 2005-07-11 5
5 2005-07-25 14
6 2005-07-27 5
> dates_releves<-as.Date(dates_releves)
> hist(dates_releves,cycles)
Error in hist.Date(dates_releves, cycles) :
invalid specification of 'breaks'
> hist(dates_releves~cycles)
Error in hist.default(dates_releves ~ cycles) :
'x' must be numeric
>
Any ideas would be great...
thks
guillaume.
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