################################################################
# name:vprph09_equal_vprph15
vprph09_equal_vprph15 <- function(input_data_frame,
Vprph09 = "vprph09",
Vprph15 = "vprph15")
{
# perform check
input_data_frame$vprph_equal_transgression <- ifelse(input_data_frame[,Vprph09] == input_data_frame[,Vprph15], 1, 0)
return(input_data_frame)
}
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