R: Grade True False Answers

grade.truefalse {grade}

R Documentation

Grade True False Answers

Description

Checks studentans against correctans. For true/false answers only.

Usage

grade.truefalse(correctans, studentans, tolerance=0.01,
             useeval=TRUE, usena=FALSE, useinf=FALSE, quiet=TRUE)

Arguments

`correctans`	`TRUE` or `FALSE` or a `string`
`studentans`	`TRUE` or `FALSE` or a `string`
`tolerance`	a `string` or `numeric` representing the accepted component wise tolerance
`useeval`	`TRUE` or `FALSE` indicates whether or not to use 'eval' on strings
`usena`	`TRUE` or `FALSE` indicating whether or not `NA` is an accepted value
`useinf`	`TRUE` or `FALSE` indicating whether or not `Inf` and `-Inf` are accepted values
`quiet`	`TRUE` or `FALSE`. If `TRUE` there are more warning messages when checks fail. Can be helpful for debugging.

Value

TRUE if studentans==correctans AND both studentans and correctans are TRUE or FALSE. FALSE otherwise.

Note

The grade main page contains a discussion of the common parameters correctans, studentans, useeval, usena, useinf, quiet. grade.truefalse does not accept usena or useinf. Setting usena=TRUE or useinf=TRUE will result in a warning. tolerance is not used in grade.truefalse. These arguments are included for compatibility with the other function calls in grade.

Examples


grade.truefalse(TRUE, TRUE) # TRUE
grade.truefalse(TRUE, "TRUE") # TRUE
grade.truefalse("FALSE", "TRUE") # FALSE
## depending on your environment settings, this next example may work.
#grade.truefalse("F", F) # TRUE if your environment has not redefined 'F'

[Package grade version 0.2-1 Index]