Create option to disable SI prefixes

[albyr]

Many pupils struggle with, or are "frightened" by, the use of SI prefixes. It would be useful to have a toggle that would disable them in a given output.

[benyohaiphysics]

Good idea. I create the variables randomly using sample(0:100,1)*10^(sample(-3:6,1)). If you remove everything following the asterisk, it should achieve what you want.

I'm still trying to work out the best way to separate out all the drawing logic and adding in things like this as variables.

[albyr]

I think a simple usePrefixes = TRUE in the head and an if ... else statement would probably be the easiest way to go.