Hello!
Hope everyone is doing as well as possible.
I have a question about write.csv. I thought that the append argument
would permit adding another data frame with the same column names.
Here is my example:
date1 <- as.Date("2020-03-09")
wday <- weekdays(date1)
x1 <- data.frame(date=date1,day=wday,lev=1:5,y=rnorm(5))
x1
date day lev y
1 2020-03-09 Monday 1 -0.09543049
2 2020-03-09 Monday 2 0.53943428
3 2020-03-09 Monday 3 -0.79224851
4 2020-03-09 Monday 4 0.68168147
5 2020-03-09 Monday 5 -1.02902897
write.csv(file="test1.csv",x1,row.names=FALSE)
date1 <- date1 + 1
wday <- weekdays(date1)
x2 <- data.frame(date=date1,day=wday,lev=1:5,y=rnorm(5))
x2
date day lev y
1 2020-03-10 Tuesday 1 -0.6648301
2 2020-03-10 Tuesday 2 -0.1137580
3 2020-03-10 Tuesday 3 1.6532675
4 2020-03-10 Tuesday 4 -0.5845293
5 2020-03-10 Tuesday 5 0.2849392
write.csv(file="test1.csv",x2,row.names=FALSE,append=TRUE)
Warning message:
In write.csv(file = "test1.csv", x2, row.names = FALSE, append = TRUE) :
attempt to set 'append' ignored
The values from x2 appear in the test1.csv file.
What am I missing, please?
Thanks,
Erin
Erin Hodgess, PhD
mailto: erinm.hodg...@gmail.com
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