grade.negative {grade} | R Documentation |
Sees if studentans
is negative, correctans
is ignored.
grade.negative(correctans=NULL, studentans, tolerance=0.01, useeval=TRUE, usena=FALSE, useinf=FALSE, quiet=TRUE)
correctans |
not used in this function, no restrictions are enforced. |
studentans |
a vector of type numeric 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. |
TRUE
if (studentans
< -tolerance
)
FALSE
otherwise.
The grade
main page contains a discussion of the
common parameters correctans, studentans, useeval, usena,
useinf, quiet
.
grade.negative(studentans=0, "1") # FALSE grade.negative(NULL, "1.1", tolerance=".01") # FALSE grade.negative("soup", "-.1", tolerance=.05) # TRUE