python Programming Glossary: deriv

http://stackoverflow.com/questions/16049390/plotting-orbital-trajectories-in-python

x y z x2 y2 z2 and thus create a function that returns its derivative def deriv u t n mu np.sqrt u 0 2 u 1 2 u 2 2 return u 3.. and thus create a function that returns its derivative def deriv u t n mu np.sqrt u 0 2 u 1 2 u 2 2 return u 3 # u 0 ' u 3 u.. can be fed into scipy.integrate.odeint as such u odeint deriv u0 t where u will be the list as above. Or you can unpack u..

ode integration in python versus mathematica results

http://stackoverflow.com/questions/16222302/ode-integration-in-python-versus-mathematica-results

vy # r0 x y 0 # v0 vx vy 0 u0 x0 y0 0 vx vy 0 def deriv u dt return u 3 # dotu 0 u 3 u 4 # dotu 1 u 4 u 5 # dotu.. 86400.0 2000000.0 # secs to run the simulation u odeint deriv u0 dt x y z x2 y2 z2 u.T fig plt.figure ax fig.add_subplot 111.. Runge Kutta you can for example replace this line u odeint deriv u0 dt with something like this #reverse the order of arguments..

What are “first class” objects? [closed]

http://stackoverflow.com/questions/245192/what-are-first-class-objects

positive number returns a function that is an approximate derivative of f function makeDerivative f deltaX var deriv function.. derivative of f function makeDerivative f deltaX var deriv function x return f x deltaX f x deltaX return deriv var cos.. var deriv function x return f x deltaX f x deltaX return deriv var cos makeDerivative Math.sin 0.000001 cos 0 ~ 1 cos pi 2..