Decimal form of a unit converted answer

[Justin]

I was wondering what a good way might be to get a decimal answer when using units. For example, say I try

For example, say I do

#define units
ft = units.length.foot
m = units.length.meter

#add some lengths and output in ft
(3*ft + 4*m).convert(units.length.ft)

I get back

6143/381*foot

Awesome! However, suppose I'd rather see this represented as a decimal than a fraction. If I try

(3*ft + 4*m).convert(units.length.foot).n()

I get an error. This is occuring on Sage 4.8 for sure, and I'm pretty sure in Sage 5.0 as well.

Does anyone know why this is doing this or how I might better ask Sage to give me a decimal answer of converted units?

Thank you in advance,

Justin

[Justin]

It turns out the solution is quite simple. (I feel stupid for not figuring this one out on my own) In order to get an answer in decimal form, all i have to do is...

   #define units
   ft =  units.length.foot
   m = units.length.meter

   

   #add some lengths and convert to ft

   (3.0*ft + 4.0*m).convert(units.length.foot)

This gives

   16.1233595800525*foot

Haha. Silly me.

Also, say pi was a part of my length. I'd just do something like

   (4.0*(pi.n())*ft + 5.0*m).convert(units.length.foot)

Justin