Alec Kalinin.

On Monday, August 27, 2012 12:55:49 AM UTC+4, Robert Cimrman wrote:

On 08/26/2012 12:32 PM, Alec Kalinin wrote:

> Hi Robert,

>

> Did you mean "linear_elastic_probes.html" instead of

> "linear_elastic_tractions.html" example? I found the

> "linear_elastic_probes.html" very useful example for my purposes to probe a

> solution in the given (x, y, z) points. Also the documentation

> "src/sfepy/fem/probes.html" gives all necessary information to help me

> implement what I want to do. Thank you!

Sorry, I cut&pasted a wrong url, the correct one is [1]. But you found

another one that solves the problem.

> But, despite this, could you tell me more about low-level way to evaluate a

> variable in the given (x, y, z) point?

It's exactly how the probes do that: the key function is

variable.evaluate_at() [2], where variable is an unknown or parameter

variable. It takes just one compulsory parameter - the coordinates of

points in which you wish to evaluate the variable. You can get the

variables of a problem by problem.get_variables(), where problem is the

second argument of the post_process_hook function.

Best regards,

r.

[1] http://sfepy.org/doc-devel/primer.html#probing

[2] http://sfepy.org/doc-devel/src/sfepy/fem/variables.html ,

http://sfepy.org/doc-devel/src/sfepy/fem/fields.html