multiREvaluator
Evaluates an Expression in One or More R-language Interpreters
Description
Evaluates an R-language expression in one or more R-language interpreters
and optionally compares the results.
Usage
RCompare(expr, REvaluators = DefaultREvaluators(), substitute = TRUE,
data = NULL, envirData = parent.frame(), tolerance = 0,
returnValues = TRUE, verbose = FALSE, randomCheck = FALSE, ...)
multiREvaluator(expr, REvaluators = DefaultREvaluators(), substitute = TRUE,
data = NULL, envirData = parent.frame(), verbose = FALSE,
sideBySide = TRUE, PRINTFUN = "print", randomCheck = FALSE, ...)
DefaultREvaluators()
Arguments
| expr |
an expression to evaluate.
|
| REvaluators |
a list of REvaluator objects
as created by the makeREvaluator function.
The defaults evaluate the expressions in open-source R
and Spotfire Enterprise Runtime for R.
|
| substitute |
a logical value. Specifies how to use the expr argument.
|
| data |
if not NULL, then either a character vector or a named list specifying
the objects that must be put into the environment where expr is
evaluated. See TERREvaluator for details.
|
| envirData |
the environment where items in the character vector data are found.
|
| verbose |
a logical value. If TRUE, debugging information is printed. The default is FALSE.
|
| tolerance |
a small positive numeric value that is passed to all.equal to specify
how far apart two numeric results must be before a difference is reported.
|
| returnValues |
a logical value.
- If TRUE (the default), then RCompare returns a list
containing the results of all the evaluations, along with a list describing how each
result (except the first) differs from the first.
- If FALSE, it returns only the description of the differences.
|
| sideBySide |
a logical value. If TRUE (the default), then give the output of multiEvaluator
the class "sideBySide" so the output components are printed next
to each other, if possible.
|
| PRINTFUN |
a function or the name of a function. This is passed to sideBySide to
specify how to print the output components.
|
| randomCheck |
a logical value. If TRUE, an attribute "usedRandomSeed" is
added to the output to indicate if random numbers were used during the requested
calculations. If FALSE, that information is not returned.
The check determines if .GlobalEnv$.Random.seed changes during the calculations.
Note that code calling set.seed() can cause randomCheck to report a false negative.
|
| ... |
multiREvaluator and RCompare will pass any unrecognized arguments
to the REvaluators that they invoke.
|
Value
| multiREvaluator | returns a list of the results of evaluating the expression
in each R interpreter.
The names of the list are taken from version$version.string
in each interpreter.
The returned list has the class "sideBySide",
whose print method attempts to print the outputs beside each other
for easier visual comparison.
If the argument randomCheck is TRUE, then the output includes
an attribute, usedRandomSeed, which is a logical vector with one element
per evaluator indicating whether random numbers are used in the calculations
on each evaluator.
|
| RCompare | usually returns the same value as multiEvaluator,
with the addition of the attribute all.equal,
describing the differences between the results. |
| RCompare(..., returnValues) | returns just the list of differences. |
| DefaultREvaluators | returns getOption("REvaluators")
if it is a list of "REvaluator" objects.
Otherwise, it returns list(RinR::REvaluator, RinR::TERREvaluator),
two of the built-in REvaluators. |
See Also
Examples
## Not run:
RCompare(log2(xTest), data = list(xTest=4:16))
RCompare(lm(hp ~ gear + am, data=mtcars), REvaluators=list(REvaluator, LocalEvaluator), tol=1e-12)
myData <- subset(iris, Species == "setosa", -Species)
RCompare(prcomp(myData), data = "myData")
RCompare(kmeans(cbind(sin(1:10), cos(1:10)), 3), randomCheck=TRUE)
## End(Not run)