Re: [Scilab-users] surf & isoview: bug or unexpected "feature"
Great ! But in this case I would add also isoview('off') missed switching .cube_scaling='on' S. Le 21/02/2018 à 13:37, Samuel Gougeon a écrit : Hi Antoine and Stéphane, Please look at https://codereview.scilab.org/#/c/18857/ and its header, and try --> uman isoview! @ Samuel Le 21/02/2018 à 10:59, Antoine Monmayrant a écrit : Hi all, I am a bit surprised by the way isoview acts on a surf plot. It seems to just scale the x,y,z axis so that the plot is inside an isometric 3D cube. I was expecting an aspect ratio that depends on the Z matrix value and size or on the X,Y coordinate vectors and the Z matrix value. Here is an example: //without X,Y axis: expecting an aspect ratio in the (x,y) plan corresponding to the dimensions of the Z matrix Z=rand(10,30); h=scf(); surf(Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square //trying with X,Y coordinates: expecting an the plot to fit inside a "cube" with aspect ratios along the x,y & z directions //that depends on max(X)-min(X), max(Y)-min(Y) & max(Z)-min(Z) Z=rand(10,30); X=1:size(Z,2); Y=1:size(Z,1); h=scf(); surf(X,Y,Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square Am I the only one to expect this behaviour? Antoine ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users -- Stéphane Mottelet Ingénieur de recherche EA 4297 Transformations Intégrées de la Matière Renouvelable Département Génie des Procédés Industriels Sorbonne Universités - Université de Technologie de Compiègne CS 60319, 60203 Compiègne cedex Tel : +33(0)344234688 http://www.utc.fr/~mottelet ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] surf & isoview: bug or unexpected "feature"
Hi Antoine and Stéphane, Please look at https://codereview.scilab.org/#/c/18857/ and its header, and try --> uman isoview! @ Samuel Le 21/02/2018 à 10:59, Antoine Monmayrant a écrit : Hi all, I am a bit surprised by the way isoview acts on a surf plot. It seems to just scale the x,y,z axis so that the plot is inside an isometric 3D cube. I was expecting an aspect ratio that depends on the Z matrix value and size or on the X,Y coordinate vectors and the Z matrix value. Here is an example: //without X,Y axis: expecting an aspect ratio in the (x,y) plan corresponding to the dimensions of the Z matrix Z=rand(10,30); h=scf(); surf(Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square //trying with X,Y coordinates: expecting an the plot to fit inside a "cube" with aspect ratios along the x,y & z directions //that depends on max(X)-min(X), max(Y)-min(Y) & max(Z)-min(Z) Z=rand(10,30); X=1:size(Z,2); Y=1:size(Z,1); h=scf(); surf(X,Y,Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square Am I the only one to expect this behaviour? Antoine ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] surf & isoview: bug or unexpected "feature"
Hello, The cube_scaling appeared with version 5.2 or 5.3 (I don't remember) because the previous default behavior, which corresponds to cube_scaling="off" could produce surfaces which were very hard to visualize with default angles and hard to homogeneously "rotate" in the elevation angle, when the surface is very flat. See this example: clf [x,y]=meshgrid(-1:0.1:1,-2:0.1:2); surf(x,y,x.*y*1e-5) gca().cube_scaling="off"; The default combination cube_scaling="on" and isoview="off" corresponds to the default behavior in Matlab. Introducing the cube_scaling property and its default value helps "migrating users" as they obtain the same thing in both softwares. Anyway, I don't think that the combination cube_scaling="off" and isoview="off" has still an interest as it can produce the annoying behavior of the above example. The default combination cube_scaling="on" and isoview="off" allows the 3D object to fill the whole 3D box whatever the proportions of the enclosing 2D canvas, which is the expected default behavior. Antoine's remark points out that cube_scaling="on" and isoview="on" produces a plot whose proportions are completely wrong with respect of the value of isoview="on". Adding in the help page of "axes_properties/isoview " a sentence such as If you want *real* isometric scales on all axes in 3D you have to set cube_scaling property to 'off' is not admissible.Setting the value of cube_scaling to the opposite of the isoview value when the latter is changed could be a solution. At least, when the high level isoview *command* is used. S. Le 21/02/2018 à 11:06, Antoine Monmayrant a écrit : OK, answering my own question: It seems that when calling surf(), the cube_scaling property of the current axis is set to "on", which results in the observed behaviour. Manually resetting to its default value "off", gives me the expected behaviour. Should I fill a bug about the absence of cube_scaling mention on the help pages of surf() and isoview() ? Antoine Le 21/02/2018 à 10:59, Antoine Monmayrant a écrit : Hi all, I am a bit surprised by the way isoview acts on a surf plot. It seems to just scale the x,y,z axis so that the plot is inside an isometric 3D cube. I was expecting an aspect ratio that depends on the Z matrix value and size or on the X,Y coordinate vectors and the Z matrix value. Here is an example: //without X,Y axis: expecting an aspect ratio in the (x,y) plan corresponding to the dimensions of the Z matrix Z=rand(10,30); h=scf(); surf(Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square //trying with X,Y coordinates: expecting an the plot to fit inside a "cube" with aspect ratios along the x,y & z directions //that depends on max(X)-min(X), max(Y)-min(Y) & max(Z)-min(Z) Z=rand(10,30); X=1:size(Z,2); Y=1:size(Z,1); h=scf(); surf(X,Y,Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square Am I the only one to expect this behaviour? Antoine -- Stéphane Mottelet Ingénieur de recherche EA 4297 Transformations Intégrées de la Matière Renouvelable Département Génie des Procédés Industriels Sorbonne Universités - Université de Technologie de Compiègne CS 60319, 60203 Compiègne cedex Tel : +33(0)344234688 http://www.utc.fr/~mottelet ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] compilation with OCaml 4.06
Hello Florian, The easier would be to depend on the external Num library for the 6.0.x family as far as this library remains available; statically build against it is the way to go for OCaml code. Num might also be packaged in your system, use ocamlfind to look for it. Thanks, -- Clément Le mercredi 21 février 2018 à 08:41 +0100, Florian Blachère a écrit : > Hello, > > Scilab 6.0.0 and 6.0.1 (and the master branch) cannot be build using > OCaml 4.06 because this release remove the Num library > (https://ocaml.org/releases/4.06.html#Changes , > https://github.com/ocaml/ocaml/pull/1178), do you have any advice to > build Scilab with recent OCaml: integrate Num in Scilab, build Num > oustside of Scilab and link against it, ... ? > > Thanks by advance, > > Florian > > ___ > users mailing list > users@lists.scilab.org > http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] surf & isoview: bug or unexpected "feature"
OK, answering my own question: It seems that when calling surf(), the cube_scaling property of the current axis is set to "on", which results in the observed behaviour. Manually resetting to its default value "off", gives me the expected behaviour. Should I fill a bug about the absence of cube_scaling mention on the help pages of surf() and isoview() ? Antoine Le 21/02/2018 à 10:59, Antoine Monmayrant a écrit : Hi all, I am a bit surprised by the way isoview acts on a surf plot. It seems to just scale the x,y,z axis so that the plot is inside an isometric 3D cube. I was expecting an aspect ratio that depends on the Z matrix value and size or on the X,Y coordinate vectors and the Z matrix value. Here is an example: //without X,Y axis: expecting an aspect ratio in the (x,y) plan corresponding to the dimensions of the Z matrix Z=rand(10,30); h=scf(); surf(Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square //trying with X,Y coordinates: expecting an the plot to fit inside a "cube" with aspect ratios along the x,y & z directions //that depends on max(X)-min(X), max(Y)-min(Y) & max(Z)-min(Z) Z=rand(10,30); X=1:size(Z,2); Y=1:size(Z,1); h=scf(); surf(X,Y,Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square Am I the only one to expect this behaviour? Antoine -- +++ Antoine Monmayrant LAAS - CNRS 7 avenue du Colonel Roche BP 54200 31031 TOULOUSE Cedex 4 FRANCE Tel:+33 5 61 33 64 59 email : antoine.monmayr...@laas.fr permanent email : antoine.monmayr...@polytechnique.org +++ ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
[Scilab-users] surf & isoview: bug or unexpected "feature"
Hi all, I am a bit surprised by the way isoview acts on a surf plot. It seems to just scale the x,y,z axis so that the plot is inside an isometric 3D cube. I was expecting an aspect ratio that depends on the Z matrix value and size or on the X,Y coordinate vectors and the Z matrix value. Here is an example: //without X,Y axis: expecting an aspect ratio in the (x,y) plan corresponding to the dimensions of the Z matrix Z=rand(10,30); h=scf(); surf(Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square //trying with X,Y coordinates: expecting an the plot to fit inside a "cube" with aspect ratios along the x,y & z directions //that depends on max(X)-min(X), max(Y)-min(Y) & max(Z)-min(Z) Z=rand(10,30); X=1:size(Z,2); Y=1:size(Z,1); h=scf(); surf(X,Y,Z); isoview("on");//we should see a 3/1 aspect ratio in the x/Y plane but we have square Am I the only one to expect this behaviour? Antoine -- +++ Antoine Monmayrant LAAS - CNRS 7 avenue du Colonel Roche BP 54200 31031 TOULOUSE Cedex 4 FRANCE Tel:+33 5 61 33 64 59 email : antoine.monmayr...@laas.fr permanent email : antoine.monmayr...@polytechnique.org +++ ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users