Piecewise linear fit.

Source: R/vtreat_coders.R

vtreat custom coder based on RcppDynProg::solve_for_partition().

piecewise_linear(varName, x, y, w = NULL)

Arguments

varName

character, name of variable to work on.
x

numeric, input values.
y

numeric, values to estimate.
w

numeric, weights.

Examples


piecewise_linear("x", 1:8, c(1, 2, 3, 4, 4, 3, 2, 1))

#> [1] 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5
#> attr(,"approx_table")
#>   predXs predYs
#> 1      1    2.5
#> 2      8    2.5
#> attr(,"method")
#> [1] "linear"