amrita-ebook Google Group

AMRITA's manual pages

j...@galcit.caltech.edu (James Quirk) — Thu, 25 Feb 2010 19:06:07 UT

Please be advised that the manual pages on AMRITA's web-site
are superceded by those in your AMRITA installtion, which
are accessed via:
amrhelp
James

Re: adding axes to plots

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 23:39:46 UT

Matei,
Yes. The hirez directive increases the precision with which
page coordinates are written out to the PostScript file. This
is sometimes needed when dealing with large computational
domains with several levels of refinement. It also uses
thinner lines when drawing the computational grid so that

Re: adding axes to plots

ma...@uottawa.ca (matei) — Wed, 24 Feb 2010 23:31:07 UT

Super! -sorry for the exclamation mark ;)
a little side. what is "postscript hirez", is that a feature not yet
available on my 3.03 system?
i changed that to "postscript on" and works nicely.

Re: adding axes to plots

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 22:45:28 UT

Matei,
This requires a small generalization of the PlotAxes routine, see the
attached draw_axes_ex3, together with the use of clip save/clip restore.
Note I've also had to rejig the routine to allow the graph width/height to
be a scaled version of the mesh width/height. Otherwise the labelling
could dwarf the plot. Also note most of the work in writing the attached

Re: adding axes to plots

ma...@uottawa.ca (matei) — Wed, 24 Feb 2010 17:38:16 UT

Great, that takes care of an old problem where my frame never aligned
properly.

Re: adding axes to plots

ma...@uottawa.ca (matei) — Wed, 24 Feb 2010 17:37:15 UT

James,
My problem comes when i want to use clipping, in order to plot only a
subset of the computational domain.
In your example, how would you plot each domain, for x between 50 and
200, say, instead of the full domain?

a new keyword leveraging off fold::print

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 17:00:51 UT

Ralph,
You sent me a question offline asking how could a new keyword
send its output to the stream used by fold::print.
As the answer transcends your immediate application
I'm sending it to the newsgroup, see the attached rtm_fold_print .
It implements a keyword rtm::output that works transparently

Re: bug --> can't define #= comment

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 16:32:22 UT

Chris,
It seems that your dislike of program-folds prevented
you from trying out:
fold::amrita { explore trailing comments
echo $amrita:fold::id $?amrita:fold::comment
fold::amrita { Qu: # what happens here?
echo $amrita:fold::id $?amrita:fold::comment
}
fold::amrita { Qu: #= what happens here?

Re: adding axes to plots

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 16:17:38 UT

Matei,
To fix this bug. Edit the file:
$AMRITA/plugin/amrita/src/keyw ords/gl/plot_lib.F
and for the subroutine PLOT::FRAME_PLOT_AREA, add:
PSxmin = MIN(X1CLIP,PSxmin)
PSxmax = MAX(X2CLIP,PSxmax)
PSymin = MIN(Y1CLIP,PSymin)
PSymax = MAX(Y2CLIP,PSymax)
just before the line:
CALL PS::STROKE

Re: adding axes to plots

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 16:07:54 UT

Matei,
No it doesn't. The attached, draw_axes_ex2 uses the exact
same PlotAxes procedure in conjunction with plotarea
to produce a 5 by 3 grid of labelled plots. Examine the
folded code and you will see that the positioning and
drawing of the plots are wrapped in a pushmatrix/popmatrix pair.
This ensures that the scaling introduced by an individual

Re: adding axes to plots

ma...@uottawa.ca (matei) — Wed, 24 Feb 2010 15:16:56 UT

James,
Thanks.
This seems to work as shipped, but fails for my application.
What I want to do is the following (in no particular order):
-create a plot of a partition of my computational domain
-add axes to it
-place it in a desired location of the page with user controlled
dimensions
-repeat the above several times at different locations of the page to

Re: adding axes to plots

j...@galcit.caltech.edu (James Quirk) — Wed, 24 Feb 2010 00:26:31 UT

Matei,
Search the newsgroup for axes and you'll come across a draw_axes.mailit
I produced for Gary. Now as Gary noticed, that mailit no longer
runs owing toa change I've made to LatexMetapost.amr so I'm posting
a revised version of the script here.
James

adding axes to plots

ma...@uottawa.ca (matei) — Tue, 23 Feb 2010 15:57:47 UT

a quick one. does anybody have a working script to add axes and
numerical scales to a plot created with
amr_sol::plot?

Re: How to modify the boundary conditions using a previously obtained flowfield

j...@galcit.caltech.edu (James Quirk) — Fri, 19 Feb 2010 15:00:07 UT

Jimmy,
The short answer is: you don't. For your immediate problem
you define a state for which Z is a function of time, say:
Zinflow ::= TIME[] < $t1 ? 0 : 1
James

How to modify the boundary conditions using a previously obtained flowfield

jimmy.verrea...@mail.mcgill.ca (Jimmy) — Fri, 19 Feb 2010 14:45:57 UT

In my simulations, I'm having premature ignition of my mixture due to
simulation start-up processes. What I would like to do is to run a
simulation with combustion products in the freestream (Z=0). When I
get the steady-state flowfield, I switch on Z=1 in order to bring the
reactants in the freestream.