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Thank you Gabor. I tried to exhaust all troubleshooting solutions listed on the site you suggested prior to posting my question. Perhaps you could share what this error is stemming from. Interestingly, on another machine I have no issue with...
I am having issues with Ryacas errors. I searched and found this error was reported in 2006, but nothing since. > library(Ryacas) Loading required package: XML > yacas(expression(Factor(x^2-1))) [1] "Starting Yacas!" CommandLine(1) : Expecting ) closing bracket...
Hi Ana, If you used nls to fit your model, then you can use predict(your model name, wing length data) or Just solve for x given y. Best, Jason -------------------------------------------------------- Jason G. Romine, Ph.D. USGS Western Fisheries Research Center...
Hi Ana, I would simply select the models you think may fit your data, then use nlm or optim to fit the models. Once you have selected your final model, use your data to predict ages from wing lengths. Best...
Hi, A few issues here. From your code it appears that the date you are feeding as.ltraj is not unique (140403). You need to combine date and time then convert to POSIXct. Another thing is that, as written, das...
The gdistance package in R is what you are looking for: https://cran.r-project.org/web/packages/gdistance/gdistance.pdf https://cran.r-project.org/web/packages/gdistance/vignettes/gdistance1.pdf Best, Jason On Wed, Jan 25, 2017 at...
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