Holcombe:ProgrammingInR

SUPA Sydney University Perception and Action Lab Primer editing help refcard

R_Statistics introduces you to R

R reference cheatsheet, also a file here Media:Matlab-python-xref.pdf‎ that gives equivalent code for doing array operations in MATLAB, Python, and R In the lab we have the book Using R for Introductory Statistics.

Examining your data matrix or object, let's say it's called datos

head(datos)
str(datos)

Don't use the function attach. It seems to leave lots of data in the 'environment' that can cause problems later. Also it makes the code harder to understand.