Hi folks,
I have 25 stand height observations over 7 years period and daily
leafbiomass data during this period. I want to use the 25 plant height
observations as inputs and predict the daily stand height during the 7
years.
SH=matrix(data=NA , nrow = 2641, ncol = 1)
for (i in 1:2641) {
SH<- predict(lm(height~Date, data=Stand_Height));
dl=leafbiom$Date[i-1];
de=leafbiom$Date[i];
SH[i]=sum(SH[leafbiom$Date==de&leafbiom$Date==dl])
}
SH
The SH output is the prediction of Stand height in 25 observations
only and provides NA for the remaining 2616 iterations.
Thanks for your help.
Ahmed Attia, Ph.D.
Agronomist & Soil Scientist
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