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From: Bruno P. <bru...@cl...> - 2006-09-28 09:47:32
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Hi all,<br>
<br>
Is plplot a real equivalent to matlab? of course not, it is better!<br>
But, well, am I in front of an issue that may change my mind?<br>
NO, it's impossible!! so please, help me!<br>
<br>
Fast:<br>
Is there a plplot equivalent to the matlab function FILL?:<br>
FILL Filled 2-D polygons.<br>
FILL(X,Y,C) fills the 2-D polygon defined by vectors X and Y<br>
with the color specified by C. The vertices of the polygon<br>
are specified by pairs of components of X and Y. If necessary,<br>
the polygon is closed by connecting the last vertex to the first.<br>
<br>
Detailled:<br>
I'm using PDL plplot interface and i would like to plot an image pixel
by pixel<br>
(the pixels of this image are rectangular and have different sizes).<br>
I've read plplot doc, have a look to x15.pl and x16.pl examples but,
well, :-(<br>
I have not understood anaything.<br>
Anyway, I've found a VERY INEFFICIENT way to do it:<br>
$z is my image, (Xpos* and Ypos*) are the limits of each pixels<br>
<br>
<tt>for ($k=0;$k<$Nbpix;$k++)<br>
{<br>
$w = ones(2,2)*$z($k);<br>
plshades ($w, <br>
$XposLeft($k),<br>
$XposRight($k),<br>
$YposBot($k), <br>
$YposUp($k), <br>
$shedge, $fill_width,<br>
$cont_color, $cont_width, 1, 0, 0, 0);<br>
}<br>
</tt>Anyway, since $Nbpix is 512*100, the display takes a long time....<br>
Perhaps there is a way with \&pltr(1or2) and $cgrid(1or2) as in the
examples<br>
but i did not understand the impact on the surface....<br>
<br>
thanks all,<br>
<br>
best regards,<br>
<br>
bruno<br>
<br>
<br>
<div class="moz-signature">-- <br>
<div align="center"><u>____________________________________________________</u>
<br>
<font face="Verdana" size="2">Dr. Bruno Picard<br>
Dép. Traitement de la Mesure et Segment Sol <br>
(Data Analysis and Ground Processing Unit)
<br>
CLS<br>
Dir. Océanographie Spatiale<br>
8-10 rue Hermès, 31520 Ramonville Saint Agne, France<br>
<br>
Tél: (+33)5.61.39.37.37, Fax: (+33)5.61.39.37.82<br>
Mél: <a href="mailto:bru...@cl...">bru...@cl...</a><br>
Toile : <a href="http://julie-et-bruno.9online.fr/nono/cadrenono.html"
eudora="autourl">http://julie-et-bruno.9online.fr/nono/cadrenono.html</a><br>
</font><u>____________________________________________________</u><br>
<img src="cid:par...@cl..."><br>
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From: <hba...@ma...> - 2006-09-29 01:35:18
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On Sep 28, 2006, at 5:47 AM, Bruno Picard wrote: > Fast: > Is there a plplot equivalent to the matlab function FILL?: > FILL Filled 2-D polygons. > FILL(X,Y,C) fills the 2-D polygon defined by vectors X and Y > with the color specified by C. The vertices of the polygon > are specified by pairs of components of X and Y. If necessary, > the polygon is closed by connecting the last vertex to the first. I believe that the function you seek is called plfill. An example using the PDL interface: #!/usr/bin/perl -w use strict; use PDL; use PDL::Graphics::PLplot; plspage(0, 0, 300, 300, 0, 0); plinit(); pladv(0); plvsta(); plwind(0.0, 4.0, 0.0, 4.0); plbox(0.0, 0, 0.0, 0, "bcnst", "bcnstv"); plcol0(2); my $x = pdl(1.0, 1.0, 2.0, 2.5); my $y = pdl(1.0, 2.2, 2.1, 1.0); plfill($x, $y); plend(); The polygon is automatically closed and is drawn with the current color. Also, note that the PDL interface automatically fills in the "n" in plfill(n,x,y). best, -Hazen |
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From: Bruno P. <bru...@cl...> - 2006-09-29 07:30:39
Attachments:
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Thanks, Hazen! That's what I was looking for!<br>
<br>
I've found it in "The PLplot Plotting Library / Programmer's Reference
Manual - by MJ LeBrun & G. Furnish"<br>
but this manual is C&Fortran oriented and plfill is only descibe
with the "n" argument which refers to the vertices to be applied in<br>
the polygon.<br>
<br>
Do anyone know a more PDL oriented reference manual? (the description
of the module in cpan is a bit rough...)<br>
<br>
best,<br>
<br>
Bruno<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:hba...@ma...">hba...@ma...</a> a écrit :
<blockquote cite="mid...@ma..."
type="cite"><br>
On Sep 28, 2006, at 5:47 AM, Bruno Picard wrote:
<br>
<br>
<blockquote type="cite"> Fast:
<br>
Is there a plplot equivalent to the matlab function FILL?:
<br>
FILL Filled 2-D polygons.
<br>
FILL(X,Y,C) fills the 2-D polygon defined by vectors X and Y
<br>
with the color specified by C. The vertices of the polygon
<br>
are specified by pairs of components of X and Y. If necessary,
<br>
the polygon is closed by connecting the last vertex to the first.
<br>
</blockquote>
<br>
I believe that the function you seek is called plfill.
<br>
<br>
An example using the PDL interface:
<br>
<br>
#!/usr/bin/perl -w
<br>
<br>
use strict;
<br>
use PDL;
<br>
use PDL::Graphics::PLplot;
<br>
<br>
plspage(0, 0, 300, 300, 0, 0);
<br>
plinit();
<br>
pladv(0);
<br>
plvsta();
<br>
plwind(0.0, 4.0, 0.0, 4.0);
<br>
plbox(0.0, 0, 0.0, 0, "bcnst", "bcnstv");
<br>
<br>
plcol0(2);
<br>
my $x = pdl(1.0, 1.0, 2.0, 2.5);
<br>
my $y = pdl(1.0, 2.2, 2.1, 1.0);
<br>
plfill($x, $y);
<br>
<br>
plend();
<br>
<br>
<br>
The polygon is automatically closed and is drawn with the current
color. Also, note that the PDL interface automatically fills in the "n"
in plfill(n,x,y).
<br>
<br>
best,
<br>
-Hazen
<br>
<br>
<br>
<br>
<br>
<br>
</blockquote>
<br>
<div class="moz-signature">-- <br>
<div align="center"><u>____________________________________________________</u>
<br>
<font face="Verdana" size="2">Dr. Bruno Picard<br>
Dép. Traitement de la Mesure et Segment Sol <br>
(Data Analysis and Ground Processing Unit)
<br>
CLS<br>
Dir. Océanographie Spatiale<br>
8-10 rue Hermès, 31520 Ramonville Saint Agne, France<br>
<br>
Tél: (+33)5.61.39.37.37, Fax: (+33)5.61.39.37.82<br>
Mél: <a href="mailto:bru...@cl...">bru...@cl...</a><br>
Toile : <a href="http://julie-et-bruno.9online.fr/nono/cadrenono.html"
eudora="autourl">http://julie-et-bruno.9online.fr/nono/cadrenono.html</a><br>
</font><u>____________________________________________________</u><br>
<img src="cid:par...@cl..."><br>
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</div>
</body>
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From: Alan W. I. <ir...@be...> - 2006-09-29 16:58:49
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> Thanks, Hazen! That's what I was looking for! > I've found it in "The PLplot Plotting Library / Programmer's > Reference Manual - by MJ LeBrun & G. Furnish" > but this manual is C&Fortran oriented and plfill is only descibe with > the "n" argument which refers to the vertices to be applied in > the polygon. > > Do anyone know a more PDL oriented reference manual? (the description > of the module in cpan is a bit rough...) I don't think there is one. I agree our manual (most up-to-date version is at http://plplot.sourceforge.net/docbook-manual/plplot-html-5.6.1/) is currently oriented toward C, fortran 77 (and Tcl/Tk) and needs lots of work in describing all our other computer language interfaces. Currently our best documentation of the Fortran 95, Python, Java, and Perl/PDL interfaces to PLplot is through our set of working examples in the examples sub-directory of our tarball and also available at http://plplot.sourceforge.net/examples/index.html. In general all those mentioned language interfaces are essentially identical to the well-documented C interface except that the redundant array dimensions have been dropped from argument lists (as you can see also from looking at the examples). Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ |
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