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From: Koen van der Drift <kvddrift@ea...>  20040827 23:37:18

Hi, PLplot 5.3.1 is now available through fink on Mac OS X. Compared to version 5.3.0, octave is now also supported, so expect some additional packages to be installed as well. If you experience any difficulties installing it, please report it to me and/or here and/or the fink mailing list. enjoy,  Koen. 
From: <WH<arms@bf...>  20040810 12:51:24

hi list, here is the notworking (but compiling) testprogramm of mine. the data are: input: x,y position and z=value here 0 or 1 i do plpoin() to demonstrate the data are there. then i copy from struct in the feld X,Y,Z just to have access, not clever but i works. the target data dX,dY are filed with 0..count after tranlating my data in to gridded data i try to display the stuff. were did i get the concept wrong ? walter #include <stdio.h> #include <stdlib.h> #include <math.h> #include <string.h> #include <ctype.h> #include "plplot/plConfig.h" #include "plplot/plplot.h" struct station { PLFLT x; PLFLT y; PLFLT z; }; int count=20; int main(int argc, char *argv[]) { /* original data set */ struct station pnt[count]; PLFLT X[count]; PLFLT Y[count]; PLFLT Z[count]; /* display data set */ PLFLT dX[count]; PLFLT dY[count]; PLFLT **dZ; int i,alg,xborder,yborder;; (void) plParseOpts(&argc, argv, PL_PARSE_FULL); for(i=0;i<count;i++) { pnt[i].x= (PLFLT) (rand()%100); /* 0...99 */ pnt[i].y= (PLFLT) (rand()%100); /* 0...99 */ pnt[i].z= (PLFLT) (rand()& 1); /* 0,1 */ } /* Initialize plplot */ plsdev ("xwin"); /* we use only X11 */ plinit(); for(i=0;i<count;i++) { X[i]=pnt[i].x; Y[i]=pnt[i].y; Z[i]=pnt[i].z; dX[i]=i; dY[i]=i; } plAlloc2dGrid(&dZ, count, count); /* the output grided data */ alg=1; xborder=10; yborder=10; pladv(0); plvpor(0.1,0.9,0.1,0.9); plwind(0xborder, 100+xborder ,0yborder, 100+yborder ); plpoin(count, X, Y, 5); pladv(0); pllab("", "", "titletest"); plgriddata(X,Y,Z,count,dX,count,dY,count,dZ,alg,GRID_CSA); plot3d(dX,dY,dZ,count,count,DRAW_LINEXY,0); pladv(0); plend(); return 0; } 
From: Arjen Markus <arjen.markus@wl...>  20040810 08:47:46

" (Walter Harms)" wrote: > > Hi arjen, > thx for reply. plpoin3() displays a 3D cloud. so far i > understand i need a function function that takes: > unordered ( pos (x,y)+ value) > value=z[x'][y'] (ordered) > I had the implession that plgriddata() will do exacty that. > > i have a simple example programm of the problem (not working) > can i post this to the ml as explanation what i am looking for ? > > regards, > walter > Sure, if it is not too long, i.e. below say 100 lines, it should be no problem. I did not have a detailed look yet at your other posting ... Regards, Arjen 
From: <WH<arms@bf...>  20040810 08:35:37

Hi arjen, thx for reply. plpoin3() displays a 3D cloud. so far i understand i need a function function that takes: unordered ( pos (x,y)+ value) > value=z[x'][y'] (ordered) I had the implession that plgriddata() will do exacty that. i have a simple example programm of the problem (not working) can i post this to the ml as explanation what i am looking for ? regards, walter               Original Message               From: Arjen Markus <arjen.markus@...> Subject: Re: [Plplotgeneral] contour plot question Date: 08/10/04 10:02 " (Walter Harms)" wrote: > > hi list, > i am looking for a way to plot isolines. so far i understand > is the way plpoin3(). therefor you need z[x][y]. the problem > is i have data for x=0...6000,y=0...9000. a simple field would > become very expensive exspecialy if i have only 2500 point in total (uneven distributed). > > Is there a way to plot a "3D field" like plploin(N,x,y,z) ? > > regards, > walter > > In addition to Alan's reply, the need for array elements z[x][y] does not necessarily mean that you need data for every integral value of x and y, as you seem to imply. plpoin3() expects individual points (x[i],y[i],z[i]) (i=0,...,N). You may want to look at plcont() for filled contours for instance, which takes a matrix z[nx][ny]. Regards, Arjen 
From: Arjen Markus <arjen.markus@wl...>  20040810 08:02:39

" (Walter Harms)" wrote: > > hi list, > i am looking for a way to plot isolines. so far i understand > is the way plpoin3(). therefor you need z[x][y]. the problem > is i have data for x=0...6000,y=0...9000. a simple field would > become very expensive exspecialy if i have only 2500 point in total (uneven distributed). > > Is there a way to plot a "3D field" like plploin(N,x,y,z) ? > > regards, > walter > > In addition to Alan's reply, the need for array elements z[x][y] does not necessarily mean that you need data for every integral value of x and y, as you seem to imply. plpoin3() expects individual points (x[i],y[i],z[i]) (i=0,...,N). You may want to look at plcont() for filled contours for instance, which takes a matrix z[nx][ny]. Regards, Arjen 
From: Rafael Laboissiere <rlaboiss@us...>  20040805 17:09:09

The Debian packages for PLplot 5.3.1 have been backported for Debian stable (a.k.a "woody"). Instructions for accessing them through apt are available at: http://plplot.sourceforge.net/resources/ CAVEAT: the packages have not been extensively tested. At least the C examples work fine.  Rafael 
From: <WH<arms@bf...>  20040805 12:22:25

hi, i have still problems with these grid data stuff. perhaps i am on the wrong way ? here is a shortcut of my problem: /* count 2Dpoints with value Z */ count=20; for(i=0;i<count;i++) { pnt[i].x= (PLFLT) (rand()%100); /* 0...99 */ pnt[i].y= (PLFLT) (rand()%100); /* 0...99 */ pnt[i].z= (PLFLT) (rand()& 1); /* 0,1 */ } my impression was that plgriddata() das the magic to move [x,y,z] > z[a][b] /* org line from my trial X,Y,Z is the array with the original data dY,dX,dZ is the (display)data */ plgriddata(X,Y,Z,count,dX,count,dY,count,dZ,alg,GRID_CSA); I exspected now a mesh (or something like that) with: plot3d(dX,dY,dZ,count,count,DRAW_LINEXY,0); I did saome other experiments but obviously i got something seriously wrong :( regards, walter 
From: Rafael Laboissiere <rlaboiss@us...>  20040805 08:46:15

* Walter Harms <WHarms@...> [20040805 10:12]: > the example 21 seems to work ok. i get the 3 pictures i see > with http://plplot.sourceforge.net/examples/demo21.php > but with delauny and natural neighboirs missing. > something to worry about ? > > *** PLPLOT ERROR *** > plgriddata(): you must have Qhull to use GRID_DTLI., aborting operation The error message above means exactly what it says: "you must have Qhull to use GRID_DTLI". In other words, you must install the Qhull library in your system (see http://www.qhull.org). PLplot's configure will automatically detect its presence.  Rafael 
From: <WH<arms@bf...>  20040805 07:57:34

hi list, the example 21 seems to work ok. i get the 3 pictures i see with http://plplot.sourceforge.net/examples/demo21.php but with delauny and natural neighboirs missing. something to worry about ? *** PLPLOT ERROR *** plgriddata(): you must have Qhull to use GRID_DTLI., aborting operation 
From: <WH<arms@bf...>  20040805 07:23:40

hi alan, looks interessting. i will try it. The problem i have is a more geographic one. Asume you have samples from all over alaska. now you want to plot the distribution. Clearly you have vast streches with no data (sea, canada), then "clusters" from easy accessable sites that define a minimum resolution and "normal" data. (not exacly my problem but you will get the picture, i hope) regards, walter               Original Message               From: Alan W. Irwin <irwin@...> Subject: Re: [Plplotgeneral] contour plot question Date: 08/04/04 18:38 On 20040804 17:57+0200 WHarms@... wrote: > hi list, > i am looking for a way to plot isolines. so far i understand > is the way plpoin3(). therefor you need z[x][y]. the problem > is i have data for x=0...6000,y=0...9000. a simple field would > become very expensive exspecialy if i have only 2500 point in total (uneven distributed). > > Is there a way to plot a "3D field" like plploin(N,x,y,z) ? > I may not properly understand your question, but I will try to answer anyway. To transform irregularly spaced data to a uniform grid take a look at http://plplot.sourceforge.net/docbookmanual/plplothtml5.3.1/plgriddata.html for documentation and http://plplot.sourceforge.net/examples/demo21.php for an example using this function. After you have transformed your data to a uniform grid, then try http://plplot.sourceforge.net/docbookmanual/plplothtml5.3.1/plcont.html to plot contours. http://plplot.sourceforge.net/examples/demo09.php shows contour examples. If, instead, you simply want to plot a 3D line in 3D perspective, have a look at http://plplot.sourceforge.net/docbookmanual/plplothtml5.3.1/plline3.html and http://plplot.sourceforge.net/examples/demo18.php. Alan __________________________ Alan W. Irwin email: irwin@... phone: 2507272902 Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the PLplot scientific plotting software package (plplot.org), the Yorick frontend to PLplot (yplot.sf.net), the Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project (lbproject.sf.net). __________________________ Linuxpowered Science __________________________  This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG Open Source Technology Group. Come see the changes on the new OSTG site. http://www.ostg.com _______________________________________________ Plplotgeneral mailing list Plplotgeneral@... https://lists.sourceforge.net/lists/listinfo/plplotgeneral 
From: Alan W. Irwin <irwin@be...>  20040804 16:44:32

On 20040804 17:57+0200 WHarms@... wrote: > hi list, > i am looking for a way to plot isolines. so far i understand > is the way plpoin3(). therefor you need z[x][y]. the problem > is i have data for x=0...6000,y=0...9000. a simple field would > become very expensive exspecialy if i have only 2500 point in total (uneven distributed). > > Is there a way to plot a "3D field" like plploin(N,x,y,z) ? > I may not properly understand your question, but I will try to answer anyway. To transform irregularly spaced data to a uniform grid take a look at http://plplot.sourceforge.net/docbookmanual/plplothtml5.3.1/plgriddata.html for documentation and http://plplot.sourceforge.net/examples/demo21.php for an example using this function. After you have transformed your data to a uniform grid, then try http://plplot.sourceforge.net/docbookmanual/plplothtml5.3.1/plcont.html to plot contours. http://plplot.sourceforge.net/examples/demo09.php shows contour examples. If, instead, you simply want to plot a 3D line in 3D perspective, have a look at http://plplot.sourceforge.net/docbookmanual/plplothtml5.3.1/plline3.html and http://plplot.sourceforge.net/examples/demo18.php. Alan __________________________ Alan W. Irwin email: irwin@... phone: 2507272902 Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the PLplot scientific plotting software package (plplot.org), the Yorick frontend to PLplot (yplot.sf.net), the Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project (lbproject.sf.net). __________________________ Linuxpowered Science __________________________ 
From: <WH<arms@bf...>  20040804 15:42:34

hi list, i am looking for a way to plot isolines. so far i understand is the way plpoin3(). therefor you need z[x][y]. the problem is i have data for x=0...6000,y=0...9000. a simple field would become very expensive exspecialy if i have only 2500 point in total (uneven distributed). Is there a way to plot a "3D field" like plploin(N,x,y,z) ? regards, walter 