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2008 Mar 20
1
Use of Factors
...) # create the values to interpolate to interp_out[,3]=c(0,25,50,75,100,125,150,175,200,0,25,50,75,100,125,150,1 75,200); # fill the visits interp_out[,2]=c(1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2) # fill the SubjID interp_out[,1]=SubjID; Now fill in interplated values for each visit. interp_out[1:9,4]=hrv1;interp_out[10:18,4]=hrv2; # hrv1 & hrv2 come from the following function, the "lm" parameter is output from the standard lm() function: interpolateToXL = function(lm,maxxl){ int_values=matrix(nrow=9,ncol=1) int_values[1,]=coef(lm)[1]; if (maxxl>25) int_values[2,]=coef(lm)[1]+coe...