/
test145.py
46 lines (36 loc) · 1.05 KB
/
test145.py
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from dolfin import *
import numpy as np
mesh = UnitSquareMesh(40, 40)
n = 5
V = FunctionSpace(mesh, 'DG', 1)
M = MixedFunctionSpace([V]*n)
u = Function(M)
U = u.vector()
# Manual assign to vector
# Extract subfunction dofs
dofs_is = [M.sub(i).dofmap().dofs() for i in range(n)]
for dofs_i in dofs_is:
# Extract subfunction values
U_i = U[dofs_i]
# Modify values to i+1
U_i += i+1
# Assign
U[dofs_i] = U_i
# Check, that subfunctions are i+1
print all(near(U[dofs_i].norm('linf'), i+1) for dofs_i in dofs_is)
# Use assigner
assigner = FunctionAssigner(M, [V]*n)
# Create functions in V with values of subfunctions
functions = [Function(V) for dofs_i in dofs_is]
for f, dofs in zip(functions, dofs_is):
f.vector()[:] = U[dofs]
# Parellel
# f.vector().set_local(np.array(U[dofs], dtype='double'))
# f.vector().apply('')
# Modify values
for f in functions:
f.vector()[:] *= 10
# Assign
assigner.assign(u, functions)
# Check, that subfunctions are 10*(i+1)
print all(near(U[dofs_i].norm('linf'), 10*(i+1)) for dofs_i in dofs_is)