d3gr definition what is the variable for combining two variables for a mixed model what does d1d2gr do in an interaction model defining contrasts in mixed model how to create contrasts in a mixed model if a model includes two pairs of comparisons, why would i do the two comparisons? how do you find the data for each model how to do contrast model in a mixed data set lme(response  day*group, random=1|id, data) to run a model what is the function for calculating the specific contrast which variable is used to perform contrast how to create a contrast what variable does the mixed model use to create contrasts when running contrasts in the mixed model do you use the following variable in excel how do i do a specific contrast in a mixed model how to run contrast in lncm model what is meant by specific contrast in mixed model calculating contrast data in a linear mixed model why do i use the word 'contrasts' as a variable? why is it necessary to run contrasts in mixed model