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[SPARK-12158] [SparkR] [SQL] Fix 'sample' functions that break R unit test cases #10160

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[SPARK-12158] [SparkR] [SQL] Fix 'sample' functions that break R unit test cases #10160

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ec77010
add sample functions with seeds
gatorsmile Dec 5, 2015
2ab89e8
combine two variants
gatorsmile Dec 6, 2015
34d0118
added a test case
gatorsmile Dec 7, 2015
4337c35
simplified the impl of sample_frac
gatorsmile Dec 7, 2015
a78109e
simplified the impl of sample_frac.
gatorsmile Dec 7, 2015
ad3ea31
Merge remote-tracking branch 'upstream/master' into sampleR
gatorsmile Dec 7, 2015
493b368
added a new parm into the comment
gatorsmile Dec 7, 2015
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simplified the impl of sample_frac
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@gatorsmile
gatorsmile committed Dec 7, 2015
commit 4337c35e03f8d70a6346e43888eaf3b6ba341722
6 changes: 2 additions & 4 deletions R/pkg/R/DataFrame.R
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Expand Up @@ -682,6 +682,8 @@ setMethod("sample",
function(x, withReplacement, fraction, seed) {
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@shivaram shivaram Dec 7, 2015

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@felixcheung Shouldn't we document this param in the roxygen doc above ? Otherwise how would anybody know we support a seed ?

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@felixcheung felixcheung Dec 7, 2015

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yes we should add a @param seed above, thanks for catching it

if (fraction < 0.0) stop(cat("Negative fraction value:", fraction))
if (!missing(seed)) {
# TODO : Figure out how to send integer as java.lang.Long to JVM so
# we can send seed as an argument through callJMethod
sdf <- callJMethod(x@sdf, "sample", withReplacement, fraction, as.integer(seed))
} else {
sdf <- callJMethod(x@sdf, "sample", withReplacement, fraction)
Expand All @@ -695,11 +697,7 @@ setMethod("sample_frac",
signature(x = "DataFrame", withReplacement = "logical",
fraction = "numeric"),
function(x, withReplacement, fraction, seed) {
if (!missing(seed)) {
sample(x, withReplacement, fraction, as.integer(seed))
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@sun-rui sun-rui Dec 7, 2015

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2 space ident. directly pass seed is ok instead of as.integer(seed)?

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@gatorsmile gatorsmile Dec 7, 2015

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Yeah, done! This is my first time to read and write R. : ) Thank you!

} else {
sample(x, withReplacement, fraction)
}
})

#' nrow
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