Check that column is in data frame

Errors if 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, val=4, val_q25=6, val_q75=8),
  "val_q25"
)
try(casteval:::validate_column(
  data.frame(time=1, val=4),
  "val_mean"
))
#> Error in casteval:::validate_column(data.frame(time = 1, val = 4), "val_mean") : 
#>   column `val_mean` not in data frame