Juanchi questions

• Error when installing "devtools" package for R in Ubuntu
• knitr -pandoc-citeproc error when compiling pdf output
• R: error installing packages UBUNTU - Error in dyn.load(file, DLLpath = DLLpath, ...) : unable to load shared object
• tidyr - spread multiple columns
• Plotting a list of non linear regressions with ggplot
• Extracting coefficients and their standard error for each unit in an lme model fit

Juanchi answers