Time for action - using whos

We are working with quite a few variables now. We can list them all with whos:

octave:48>whos
Variables in the current scope:

Attr	Name	Size	Bytes		Class
====	====	====	=====		=====
	A	2x2	32		double
	B	2x2x2	128		double
	T	2x6	12		char
	Z	2x2	64		double
	a	1x1	8		double
	ans	1x9	9		char
	b	1x5	40		double
	c	3x1	24		double
	d	1x12	96		double
	projectile	1x3	42		cell
	projectiles	2x3	83		cell
	s	1x2	83		struct
	t	1x11	11		char
	z	1x1	16		double

Total is 81 elements using 648 bytes

What just happened?

As seen above, whos prints out five columns. The first column can have values g or p, which means that the variable is global or persistent. We shall return to what these qualifiers mean in Chapter 5. In our case, all the variables are what are named local, which is not stated explicitly by the command whos. A local variable is characterized by being visible and therefore accessible to a given workspace...