In this section, we give some advice about running R in various locations — particularly Stampede2 and Frontera but also locally on your own machines — for development or simple testing.

Keep these R facts in mind:

• Capitalization matters, so that a variable called temp is different from one called Temp.
• When specifying the path of a file the direction of the slash also matters. Windows uses backslashes (\) and Linux uses forward slashes (/). Since the backslash is an escape sequence, you will need two of them in the Windows paths, e.g., .