created May 20, 2006 · complexity basic · author Anon · version n/a
Here is how to define and use a calculator, using embedded Python.
These two lines go in your vimrc:
:command! -nargs=+ Calc :py print <args> :py from math import *
Now use it inside Vim:
:Calc 2**10+5,2**16,2**128 1029 65536 340282366920938463463374607431768211456 :Calc sin(pi/2), log(10) 1.0 2.302585
You have to have Vim compiled with Python support, and have python on your machine†. Use :version to see which features are included in your Vim. Go to http://python.org/ for Python.
If you don't have Python support in your Vim, but do have a python command, use this instead
command! -nargs=+ Calc :!python -c "from math import *; print <args>"
You also get complex numbers and other goodies. Google for Python and math. Here is an example from complex math:
:py from cmath import * :Calc exp(pi*1j) , " Euler famous identify e^i.pi = -1" (-1+1.22460635382e-016j) :Calc reduce(lambda a,b:a+b,range(1,100+1)), "Gauss' famous identity sum(1,100)" 5050
See references: http://docs.python.org/lib/module-cmath.html http://mathworld.wolfram.com/EulerFormula.html
dll
These days in Vim python support is usually via a shared library or dll, installed separately from Vim; :version shows +python/dyn.