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FilterPerformance: use fresh resampling instance in each invocation #173

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FilterPerformance: use fresh resampling instance in each invocation #173

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8 changes: 6 additions & 2 deletions R/FilterPerformance.R
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Original file line number Diff line number Diff line change
Expand Up @@ -77,10 +77,14 @@ FilterPerformance = R6Class("FilterPerformance",
.calculate = function(task, nfeat) {
task = task$clone()
fn = task$feature_names

# need to clone `resampling` between different invocations of `.calculate()`,
# since `resample()` will instantiate it.
# We also instantiate it here -- this happens implicitly in `resample()`,
# but we do it explicitly here for readability and clarity.
resampling = self$resampling$clone(deep = TRUE)$instantiate(task)
perf = map_dbl(fn, function(x) {
task$col_roles$feature = x
resample(task, self$learner, self$resampling, clone = character())$
resample(task, self$learner, resampling, clone = character())$
aggregate(measures = self$measure)
})

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