Working with the R Software
Valérie David · 2019
The R software is both a computer programming language and a working environment for statistical data processing. The c() function allows the creation of a sequence of numbers, and the factor() function allows the creation of a multimodality factor that corresponds to text, which in turn matches a qualitative variable. Any database must be presented with one element per line and with the variables in columns. This is particularly the case for the crab's database. Some functions create a window before displaying the graph; others do not create new graphs, but instead add information about the existing graph: axis(), title(), text(), points(), and lines() functions. A histogram represents the values of a quantitative variable by classifying them in intervals. Barplots can also be used when representing the mean with a dispersion estimator such as standard deviations or standard errors.