☎

Installed a pyenv for symbolic math, worked for the first time with sympy.

Making the pyenv

In thesis/compute_derivs:

pyenv install 2.7
pyenv virtualenv symmath
pyenv local symmath

Get the sympy package at commit 253595b4d

git clone git://github.com/sympy/sympy.git

I followed parts of Sympy’s tutorial. Main takeaway:

from sympy import *
init_printing(use_unicode=True)             # Pretty printing the output

v1, v2, v3 = symbols('v1 v2 v3', real=True) # Making symbols of real values
v = Matrix([[v1],[v2],[v3]])                # Tada, it's a vector now
diff(v.norm(), v)                           # Compute the deriv of the norm

Questions: