library("regressoR.functional.models")
context("FunctionalModel.exponentialDecay.2")
test_that("Test FunctionalModel.exponentialDecay.2", {
model <- FunctionalModel.exponentialDecay.2();
expect_identical(is.null(model), FALSE);
expect_identical(is(model, "FunctionalModel"), TRUE)
expect_identical(model@paramCount, 4L)
expect_null(model@paramLower)
expect_true(is.na(model@paramUpper[1]))
expect_lt(model@paramUpper[2], 0)
expect_lt(model@paramUpper[3], 0)
expect_lt(model@paramUpper[4], 0)
validObject(model)
decay <- function(x, par) { par[1]+(par[2]*exp(par[3]*x^par[4])) }
grad <- function(x, par) { c(1,
exp(par[3]*x^par[4]),
par[2] * x^par[4] * exp(par[3]*x^par[4]),
par[2] * par[3] * x^par[4] * exp(par[3]*x^par[4]) * log(x) ) }
par<-c(1, -3, -0.4, -2 );
x <- c(1)
y <- decay(x, par)
expect_equal(model@f(x, par), y)
expect_equal(model@gradient(x[1], par), grad(x[1], par))
par<-c(0.2, -2, -0.4, -1 );
x <- c(1, 2)
y <- decay(x, par)
expect_equal(model@f(x, par), y)
expect_equal(model@gradient(x[1], par), grad(x[1], par))
expect_equal(model@gradient(x[2], par), grad(x[2], par))
})
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