select {m61r}

select columns of a data.frame

Description

Select columns of a data.frame.

Usage

select_(df, variable = NULL)

Arguments

df

data.frame

variable

formula that describes the selection

Value

select_() returns a data frame. Properties:

• Only columns following the condtion determined by

• variable appear.

• Rows are not modified.

Examples

  tmp <- select_(CO2,~Type)
  head(tmp)

  tmp <- select_(CO2,~c(Plant,Type))
  head(tmp)

  tmp <- select_(CO2,~-Type)
  head(tmp)

  tmp <- select_(CO2,variable=~-(Plant:Treatment))
  head(tmp)