Lme function CO2 respiration

General
1

Hi there,

I am really struggling with the formulation of my linear mixed effect model.
I need a lme function in which several fixed effects involved and random effects.
The fixed effects are soilmoist, soiltemp and airtemp having an influence on the CO2 respiration rate that is visualized below. Moreover, 2 random effects are involved, the potid and date. How can I generate a lme function that matches these requirements?

This is the function I have come up with so far. However, this results in a negative slope....
D13<-lme(CO2~DT+DT:SoilTemp+DT:SoilMoist+DT:AirTemp,
random=list(~0+DT|PotID, ~DT|Date), data =Dark, control = ctrl)

Rplot

2

This topic was automatically closed 21 days after the last reply. New replies are no longer allowed.

If you have a query related to it or one of the replies, start a new topic and refer back with a link.