Re: [FEniCS] [FEniCS-support] Function evaluate_basis_derivatives

Michael Sacks Sun, 16 Mar 2014 15:22:23 -0700

Hello,

Any idea when the version of FENICS will be released for MAC OS 9?

-Michael Sacks

Anders Logg

March 11, 2014 at 4:00 AM

The problem is that you set the parameter too late, before the
function space is generated. Try this, and note that the values array
must be flattened and larger to contain all first derivatives:

from dolfin import *
import numpy as np

parameters["form_compiler"]["no-evaluate_basis_derivatives"] = False

mesh = UnitSquareMesh(8,8)

Q = FunctionSpace(mesh, "CG", 2)

element = Q.dolfin_element()

basis =
np.zeros(2*element.space_dimension()*element.value_dimension(0))

coords = np.array((0.0,0.0))
cell = Cell(mesh, 0)
vc = cell.get_vertex_coordinates()

element.evaluate_basis_derivatives_all(1,basis, coords, vc, 0)

print basis

PS: To mailing list. The UFC manual needs to be (1) integrated into
the FFC manual, (2) updated and improved, and (3) published on the web
page.

--
Anders

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--
Michael Sacks, Ph.D.
W. A. “Tex” Moncrief, Jr. Endowment
Simulation-based Engineering Sciences Chair I
Institute for Computational Engineering & Sciences
Professor of Biomedical Engineering
Director, Center for Cardiovascular Simulation
The University of Texas at Austin
201 East 24th St., Stop C0200
Austin, Texas 78712-1229
Tel. 512-232-7773
website: http://ccs.ices.utexas.edu/

"There is no Royal Road to geometry"
Euclid's reply to King Ptolemy

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Re: [FEniCS] [FEniCS-support] Function evaluate_basis_derivatives

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