Ghadeer

Hi all I am studying MSc. Computational Finance and I have a module called Implementing market models. In the labs we need to work on R studio. I missed the first lab and I am lost plus I do not have a background on programming. My background is finance I need to learn how to build matrices using first: geometric Brownian motion and then using the binomial tree/black scholes. Anyone can help me finding a resource to learn these things or any special good guide ? Thanks a lot