The Pointer questions

• Discretely selecting the variables/columns I want in the parallel coordinate plot, and setting it so that this legend also displays the actual value
• How do C functions like fscanf() and fgets() remember where in the file to start reading from?
• What is the difference between programmed (polled) I/O, interrupt-driven I/O, and direct memory access (DMA)?
• How does the `prop.table()` function work in r?
• What is `S_ISREG()`, and what does it do?
• Fixing PATH for Python libraries using Bash

The Pointer answers