「statsample」ジェムを使用してみてください。以下に示す例を使用して、対数、指数、累乗、またはその他の変換を実行できます。これが役立つことを願っています。
require 'statsample'
# Independent Variable
x_data = [Math.exp(1), Math.exp(2), Math.exp(3), Math.exp(4), Math.exp(5)]
# Dependent Variable
y_data = [3, 5, 7, 9, 11]
# Logarithmic Transformation of X data
# Math.log in Ruby has the base of Euler's number 'e' ~= '2.71828',
# instead of the base '10'. Just a note.
log_x_data = x_data.map { |x| Math.log(x) }
# Linear Regression using the Logarithmic Transformation
x_vector=log_x_data.to_vector(:scale)
y_vector=y_data.to_vector(:scale)
ds={'x'=>x_vector,'y'=>y_vector}.to_dataset
mlr=Statsample::Regression.multiple(ds,'y')
mlr.summary
# Provides the value of the y-intercept
#p mlr.constant
# Lists the coefficients of each casual variable. In this case, we have only one--'x'.
#p mlr.coeffs
# The regression output produces the line y = 1 + 2*x, but
# considering that we transformed x earlier, it really produces
# y = 1 + 2*ln(x).