Check that column is in data frame

Errors of col is not a column in data frame.

Usage

validate_column(df, col)

Arguments

df

A data frame.

col

A string containing the column name.

Value

NULL if valid, error otherwise.

Examples

casteval:::validate_column(
  data.frame(time=1, raw=4, quant_25=6, quant_75=8),
  "quant_25"
)
try(casteval:::validate_column(
  data.frame(time=1, raw=4),
  "mean"
))
#> Error in casteval:::validate_column(data.frame(time = 1, raw = 4), "mean") : 
#>   column `mean` not in data frame