[R] Identifying column type

[Rui Barradas]

Hello,

Maybe something like


ok <- sapply(mydata, is.numeric)
mydata <- mydata[ok]


to keep the numeric columns only.


Hope this helps,

Rui Barradas

Às 04:25 de 10/04/21, Steven Yen escreveu:
> I have data of mixed types in a data frame - date and numeric, as shown
> in summary below. How do I identify the column(s) that is/are not
> numeric, in this case, the first. All I want is to identify the
> column(s) and so that I can remove it/them from the data frame Thanks.
> 
>> summary(mydata)
> 
> Date Spot Futures Min. :1997-09-01 00:00:00 Min. : 735.1 Min. : 734.2
> 1st Qu.:2002-10-16 12:00:00 1st Qu.:1120.7 1st Qu.:1122.6 Median
> :2007-12-01 00:00:00 Median :1301.8 Median :1303.2 Mean :2007-12-01
> 06:01:27 Mean :1423.1 Mean :1423.6 3rd Qu.:2013-01-16 12:00:00 3rd
> Qu.:1540.0 3rd Qu.:1546.5 Max. :2018-03-01 00:00:00 Max. :2823.8 Max.
> :2825.8
> 
> 
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