Message-ID: <3E91E1D4.9060101@pdf.com>
Date: 2003-04-07T20:38:44Z
From: Spencer Graves
Subject: subsetting a dataframe
> 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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