Add DTx function, check and testHEADmain

The tolerance of one test had to be increased in test_deSolve.R,
and four vdiffr snapshots with negligible differences were updated.

Tests run with a maximum of 16 cores when running in the Agroscope
Apptainer environment.

1 files changed, 26 insertions, 0 deletions

diff --git a/man/DTx.Rd b/man/DTx.Rd
new file mode 100644
index 00000000..67dba5d6
--- /dev/null
+++ b/man/DTx.Rd
@@ -0,0 +1,26 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/endpoints.R
+\name{DTx}
+\alias{DTx}
+\title{Calculate DTx from parameters of parent degradation models}
+\usage{
+DTx(type = c("SFO", "FOMC", "DFOP", "HS", "SFORB"), parms, exact = FALSE)
+}
+\arguments{
+\item{type}{Character string specifying the degradation model}
+
+\item{parms}{Named numeric vector giving the kinetic parameters}
+
+\item{exact}{Should we used log(10)/log(2) instead of the widely used value
+of 3.32 for backcalculation of DT50 values from DT90 values?}
+}
+\description{
+Calculate DTx from parameters of parent degradation models
+}
+\examples{
+# Check what type of DT50 is given in the bixafen EFSA conclusion from 2012 on p. 42
+DTx("HS", parms = c(k1 = 0.0081, k2 = 0.00023, tb = 53))
+# We get 1200 days for the time the concentration reaches 50\%, the value of 1235
+# was likely based on more digits for the parameters. The half-life corresponding
+# to the slow phase is around 3000 days
+}