def plotF(n, aroundPoint=None, aroundN=None, colorStates=False, **kwargs): opt_d = bellman.getIter(n)['opt_d'] opt_r = bellman.getIter(n)['opt_r'] # k = d + D - M k_fn = lambda x: opt_d(x) + x[1] - x[0] f_fn = lambda x: p_fns.testf(k_fn(x), opt_r(x)) return plotSurface(f_fn, 'f', aroundPoint, aroundN, colorStates=colorStates, colorFn=iterColorFn(n), **kwargs)
def getNextMD(M, D, n, zState): optdFn = bellman.getIter(n)['opt_d'] optrFn = bellman.getIter(n)['opt_r'] # k = d + D - M k_fn = lambda x: optdFn(x) + x[1] - x[0] f_fn = lambda x: p_fns.testf(k_fn(x), optrFn(x)) inflow = lambda x: f_fn(x) * g.z_space[zState] M_fn = lambda x: (inflow(x) - k_fn(x))/g.z_space[zState] D_fn = lambda x: optrFn(x) * f_fn(x) return (M_fn([M,D]), D_fn([M,D]))
def testPlotF():
fig = plt.figure()
ax = Axes3D(fig)
f_fn = lambda x: p_fns.testf(x[0], x[1])
grid_k = linspace(0, 2, 50)
grid_r = linspace(1, 3, 50)
(mesh_k, mesh_r) = meshgrid(grid_k, grid_r)
meshlist_k = mesh_k.ravel()
meshlist_r = mesh_r.ravel()
ax.scatter(meshlist_k, meshlist_r, array(map(f_fn, zip(meshlist_k, meshlist_r))))
ax.set_xlabel('k')
ax.set_ylabel('r')
ax.set_zlabel('f')
def getNextStateArray(n, zState): opt_d = bellman.getIter(n)['opt_d'] opt_r = bellman.getIter(n)['opt_r'] # k = d + D - M k_fn = lambda x: opt_d(x) + x[1] - x[0] f_fn = lambda x: p_fns.testf(k_fn(x), opt_r(x)) rho_fn = lambda x: rhoFn(x, f_fn, k_fn) def nextStateFn(M,D): (nextM, nextD) = getNextMD(M, D, n, zState) # if current state is A (bankrupt with certainty), then next state has no meaning. color it black currentState = classifyState(M, D, rho_fn, opt_d) if (currentState == g.STATE_RED): return g.STATE_BLACK # if current state is B (bankrupt if zLow occurs) and zLow occurs, next state is in bankruptcy if (currentState == g.STATE_BLUE and zState == 0): return g.STATE_BLACK return classifyState(nextM, nextD, rho_fn, opt_d) nextStateArray = scipy.vectorize(nextStateFn)(g.mesh_M, g.mesh_D) return scipy.transpose(nextStateArray)
