Basic R Programming
Introductory R Programming Practice for PBIO 1140
R is an open source program widely used in many scientific disciplines. It is particularly useful in biological sciences. It incorporates many statistical analysis packages and sequence analysis tools. It is free and easy to learn. These in class activitiies will also help you to install and get start with R.
1.1 Windows 10 users
1.2 Mac users
1.3 Here is what you see in the R console
2.1 Assign a variable
2.2 Mathematical calculation
2.3 Use Functions
3.1 Download files
# 3.2 Read CSV Files
4.1 Convert a data frame to a data matrix
>df1
# You can see the top of rownames in df2
does not have any characters. However, there is an "X" character on top of the first column in df1
. Indeed, the row names of df1
are "1" and "2", and the row names of df2
are "Your_Data" and "Class_Data", which
are more meaningful. > rownames(df1)
[1] "1" "2"
> rownames(df2)
[1] "Your_Data" "Class_Data"
4.2 Draw a barplot graph
4.3 Save a graph file
