Description Usage Arguments Value Examples
A function that takes as its arguement another function defining a inverse response variable transformation, and wraps (or adapts) it for use within a machine learning pipeline.
1 |
.f |
A unary function of a data.frame that returns a new data.frame containing only the inverse transformed response variable. An error will be thrown if this is not the case. |
A unary function of a data.frame that returns the input data.frame with the inverse
transformed response variable column appended. This function is assigned the classes
"inv_transform_response"
and "ml_pipeline_section"
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | data <- head(faithful)
f1 <- transform_response(function(df) {
data.frame(y = (df$eruptions - mean(df$eruptions)) / sd(df$eruptions))
})
f2 <- inv_transform_response(function(df) {
data.frame(eruptions2 = df$y * sd(df$eruptions) + mean(df$eruptions))
})
f2(f1(data))
# eruptions waiting y eruptions2
# 1 3.600 79 0.5412808 3.600
# 2 1.800 54 -1.3039946 1.800
# 3 3.333 74 0.2675649 3.333
# 4 2.283 62 -0.8088457 2.283
# 5 4.533 85 1.4977485 4.533
# 6 2.883 55 -0.1937539 2.883
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