is_exposure_constant {morse}

Test in a well-formed argument to function 'survData' if the concentration is constant and different from NA for each replicate (each time-serie)

Description

Test in a well-formed argument to function 'survData' if the concentration is constant and different from NA for each replicate (each time-serie)

Usage

is_exposure_constant(x)

Arguments

x

an object of class data.frame

Value

a boolean TRUE if concentration in replicate is constant, or FALSE if the concentration in at least one of the replicates is time-variable, and/or if NA occures.

Examples

# (1) Load the survival data set and test if concentration in replicates is constant
data("propiconazole")
is_exposure_constant(propiconazole)
is_exposure_constant(survData(propiconazole))

 # (1) Load the survival data set and test if concentration in replicates is constant
data("propiconazole_pulse_exposure") 
is_exposure_constant(propiconazole_pulse_exposure)