Hi, I would start with the attached book and the one in the link. They are both very helpful. Then for specific packages look for YouTube videos and Google the package name. Best wishes, David Booth

https://www.amazon.com/Everyone-Advanced-Analytics-Graphics-Addison-Wesley/dp/013454692X/ref=sr_1_1?ie=UTF8&qid=1527533730&sr=8-1&keywords=Jared+lander

Start by YouTube tutorials for general packages and functions like plotting functions, then use the manual of each package you may use for your specialty and train on its functions to master it.

I recommend you start from this book:

https://geocompr.robinlovelace.net/

It is very well done (possibly the authors are still completing it) and covers some recent packages like `sf` (https://r-spatial.github.io/sf/index.html) which - in my opinion - have made R ways of handling spatial objects much more accessible.

Hi Shaghayegh Akbarpour, I would recommend checking out the following links of useful resources:

https://www.ecoccs.com/rtraining.html#gis | EcoC2S R Trainings and Resources: GIS and R Resources

https://www.ecoccs.com/rtraining.html#hydro | EcoC2S R Trainings and Resources: (Eco)Hydrology Applications with R

https://www.ecoccs.com/rtraining.html#usgs_r | EcoC2S R Trainings and Resources: USGS and R

https://www.ecoccs.com/rtraining.html#stem | EcoC2S R Trainings and Resources: STEM (Science, Technology, Engineering, and Mathematics) and R

Thank you.