Specifying colClasses in the read.csv
I am trying to specify the collapses options in the read.csv function in R. In my data, the first column "time" is basically a character vector while the rest of the columns are numeric.
data <- read.csv("test.csv", comment.char="" ,
colClasses=c(time="character", "numeric"),
strip.white=FALSE)
In the above command, I would want R to read in the "time" column as "character" and the rest as numeric. Although the "data" variable did have the correct result after the command completed, R returned the following warnings. I am wondering how I could fix these warnings?
Warning messages:
1: In read.table(file = file, header = header, sep = sep, quote = quote, :
not all columns named in 'colClasses' exist
2: In tmp[i[i > 0L]] <- colClasses :
number of items to replace is not a multiple of replacement length
To fix colclasses r warnings, you can either mention all the column names that are to be imported in the colClasses function or mention the column that you want to specify.i.e.,
Suppose that there are five columns in your data set.
colClasses=c("character",rep("numeric",4))OR
colClasses=c("time"="character")