Hello guys,
I have a problem which I can't seem to figure out. Im working with a dataset of about 500.000 observations over 4 variables. It looks like this:
Date
AverageTemperature
AverageTemperatureUncertainty
Country
1 1743-11-01 4.384 2.294 Netherlands
6 1744-04-01 1.530 4.680 Netherlands
7 1744-05-01 6.702 1.789 France
8 1744-06-01 11.609 1.577 France
9 1744-07-01 15.342 1.410 Germany
11 1744-09-01 11.702 1.517 Germany
Now what I am trying to do here is to filter the avarage temperature for the most recent date available, per country (the dataset has info of about 200 countries). The code I've tried is
Temperatures %>% group_by(Country) %>% filter(Date == max(Date))
The error I get while using this code is
Error in Summary.factor(c(1L, 6L, 7L, 8L, 9L, 11L, 12L, 13L, 14L, 15L, :
‘max’ not meaningful for factors
Any expert who can shed some light and help me out
Thanks a lot in advance!!