[R] subsetting a dataframe

[Spencer Graves]

 > df <- data.frame(a=1, b=2, c=3)
 > df1 <- data.frame(a=1, b=2, c=3)
 > df1[,!is.element(names(df1), "b")]
   a c
1 1 3

Spencer Graves

Chris Handorf wrote:
> How does one remove a column from a data frame when the name of
> the column to remove is stored in a variable?
> 
> For Example:
> 
> colname <- "LOT"
> 
> newdf <- subset(olddf,select = - colname)
> 
> The above statement will give an error, but thats what I'm trying to 
> accomplish.
> 
> If I had used:
> 
> newdf <- subset(olddf,select = - LOT)
> 
> then it would have worked, but as I said the column name is stored in a 
> variable
> so I can't just enter it explicity.
> 
> Thanks.
> 
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