checkColumns - Check data.frame for valid columns and issue message if invalid

Description¶

Check data.frame for valid columns and issue message if invalid

Usage¶

checkColumns(data, columns, logic = c("all", "any"))

Arguments¶

data

data.frame to check.

columns

vector of column names to check.

logic

one of "all" or "any" controlling whether all, or at least one, of the columns must be valid, respectively.

Value¶

TRUE if columns are valid and a string message if not.

Examples¶

df <- data.frame(A=1:3, B=4:6, C=rep(NA, 3))
checkColumns(df, c("A", "B"), logic="all")

[1] TRUE

checkColumns(df, c("A", "B"), logic="any")

[1] TRUE

checkColumns(df, c("A", "C"), logic="all")

[1] "The column C contains no data"

checkColumns(df, c("A", "C"), logic="any")

[1] TRUE

checkColumns(df, c("A", "D"), logic="all")

[1] "The column D was not found"

checkColumns(df, c("A", "D"), logic="any")

[1] TRUE