Re: [R] Prediction plots

2017-04-21 Thread Paul Johnson
I have done this a lot. Would you mind installing my pkg rockchalk and then run example(plotSlope) and example(plotCurve)? If the output is close to what you want, you can adjust my code. The vignette explains. 1. Create newdata object 2. Run that through predict 3. Make plot None of this is rock

Re: [R] Prediction plots

2017-04-19 Thread Boris Steipe
Can you provide a small reproducible example and explain what exactly is going wrong? Just a handful of data points will do. B. > On Apr 18, 2017, at 2:16 PM, Santiago Bueno wrote: > > Thanks Boris, the following is an extract of my data. I have developed > biomass models using codes like:

[R] Prediction plots

2017-04-18 Thread Santiago Bueno
Thanks Boris, the following is an extract of my data. I have developed biomass models using codes like: start <- coef (lm(log(Btot)~I(log(dbh**2*haut)),data=dat[dat$Btot>0,])) start[1] <- exp(start[1]) names(start) <- c("a","b") M1 <- nls(Btot~a*(dbh**2*haut)**b,data=dat,start=start,weights=1/d