On Apr 19, 2010, at 2:45 PM, Santan William wrote:

>        In examples.phase.anisotropy, I want to display phase field vaiable 
> phi at a certain node in each time step,e.g,  I want to show the value of phi 
> at point x=y=1.How can I do this?
>       I tried adding "...     print "phase",phase" into the iteration as 
> following. It would show some values of phi, but I don't know how to show the 
> phi value of a certain point.

There are a couple of ways, but if you don't know the exact cell centers, this 
is probably best:

    print phi([[1.], [1.]])



>     Another question is how can I print phase field variable for all nodes at 
> each time step into a file? For example, print phi of all nodes into a file 
> with a format x,y,phi for each time step. 
>       I appreciate your kindly help.

See http://www.ctcms.nist.gov/fipy/documentation/FAQ.html#how-do-i-export-data

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