[Matplotlib-users] Is there a 3D version of the quiver plot?
I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.comwrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
On 2013/03/07 9:19 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.com mailto:bricklema...@gmail.com wrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. Eric Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
On Thu, Mar 7, 2013 at 4:25 PM, Eric Firing efir...@hawaii.edu wrote: On 2013/03/07 9:19 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.com mailto:bricklema...@gmail.com wrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. Eric Ben Root Took a bit of digging, but I knew I remembered this question before: http://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=1cad=rjaved=0CDMQFjAAurl=http%3A%2F%2Fmatplotlib.1069221.n5.nabble.com%2F2D-Quiver-in-Axes3D-td27944.htmlei=Pwk5UfGdLufv0QHuroD4BAusg=AFQjCNEqlWv2vY5l2IPcje-g6B0U21wDNwbvm=bv.43287494,d.dmQ And the feature request is here: https://github.com/matplotlib/matplotlib/issues/1026 In the thread I pointed out a bug that I encountered. I really hope I get some free time soon so that I can work on the various feature requests in mplot3d. Cheers! Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
Thanks. I had a quick read of the thread linked, if I was a stronger/better programmer I would see if I could contribute. For now I plan calculate/plot the angle between the normal and each the X,Y,Z planes. I hopefully the 3 subplots will visually convey sufficient information. Brickle. -- On 8/03/13 5:43 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 4:25 PM, Eric Firing efir...@hawaii.edu mailto:efir...@hawaii.edu wrote: On 2013/03/07 9:19 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.com mailto:bricklema...@gmail.com mailto:bricklema...@gmail.com mailto:bricklema...@gmail.com wrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. Eric Ben Root Took a bit of digging, but I knew I remembered this question before: http://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=1cad=rjaved=0CDMQFjAAurl=http%3A%2F%2Fmatplotlib.1069221.n5.nabble.com%2F2D-Quiver-in-Axes3D-td27944.htmlei=Pwk5UfGdLufv0QHuroD4BAusg=AFQjCNEqlWv2vY5l2IPcje-g6B0U21wDNwbvm=bv.43287494,d.dmQ And the feature request is here: https://github.com/matplotlib/matplotlib/issues/1026 In the thread I pointed out a bug that I encountered. I really hope I get some free time soon so that I can work on the various feature requests in mplot3d. Cheers! Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
On Thu, Mar 7, 2013 at 5:32 PM, Brickle Macho bricklema...@gmail.com wrote: Thanks. I had a quick read of the thread linked, if I was a stronger/better programmer I would see if I could contribute. For now I plan calculate/plot the angle between the normal and each the X,Y,Z planes. I hopefully the 3 subplots will visually convey sufficient information. Correct me if I'm wrong, but would a 2D quiver plot on top of a contour plot work? What spaces does the surface map to/from? If your surface can be expressed as a function f:R^2 - R then it's equivalent to look at its level sets, rather than the 3D picture. You can then project the surface normals onto the plane and plot them with a 2D quiver plot. If you want to keep the z-component information, then you could colour the arrows according to the angle they make with the x-y plane. Does that make sense? I put the original feature request in, and I think it would be useful, but often I still find it easier to process two dimensional information. N.B. The above will only work for *functions* f:R^2 - R. To clarify, a sphere cannot be expressed this way, because the resulting mapping would be multivalued. Using this method, two distinct surface normals may have the same colour. Hope that makes sense. Best wishes, Damon Brickle. -- On 8/03/13 5:43 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 4:25 PM, Eric Firing efir...@hawaii.edu wrote: On 2013/03/07 9:19 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.com mailto:bricklema...@gmail.com wrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. Eric Ben Root Took a bit of digging, but I knew I remembered this question before: http://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=1cad=rjaved=0CDMQFjAAurl=http%3A%2F%2Fmatplotlib.1069221.n5.nabble.com%2F2D-Quiver-in-Axes3D-td27944.htmlei=Pwk5UfGdLufv0QHuroD4BAusg=AFQjCNEqlWv2vY5l2IPcje-g6B0U21wDNwbvm=bv.43287494,d.dmQ And the feature request is here: https://github.com/matplotlib/matplotlib/issues/1026 In the thread I pointed out a bug that I encountered. I really hope I get some free time soon so that I can work on the various feature requests in mplot3d. Cheers! Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Damon McDougall http://www.damon-is-a-geek.com Institute for Computational Engineering Sciences 201 E. 24th St. Stop C0200 The University of Texas at Austin Austin, TX 78712-1229 -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
On 8/03/13 8:37 AM, Damon McDougall wrote: Correct me if I'm wrong, but would a 2D quiver plot on top of a contour plot work? What spaces does the surface map to/from? If your surface can be expressed as a function f:R^2 - R then it's equivalent to look at its level sets, rather than the 3D picture. You can then project the surface normals onto the plane and plot them with a 2D quiver plot. If you want to keep the z-component information, then you could colour the arrows according to the angle they make with the x-y plane. Does that make sense? My source is an image, so technically f:R^2 - R. Specifically I am using depth maps or (range image) what to visualise the surfaces/normals. I was planing on plotting the image as surface (hadn't work out how yet) and overlay the normal vectors. I think a 2D quiver plot on top of a contour plot may provide a useful visualisation/interpretation of the process. Thanks for the idea. Brickle. -- I put the original feature request in, and I think it would be useful, but often I still find it easier to process two dimensional information. N.B. The above will only work for *functions* f:R^2 - R. To clarify, a sphere cannot be expressed this way, because the resulting mapping would be multivalued. Using this method, two distinct surface normals may have the same colour. Hope that makes sense. Best wishes, Damon Brickle. -- On 8/03/13 5:43 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 4:25 PM, Eric Firing efir...@hawaii.edu wrote: On 2013/03/07 9:19 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.com mailto:bricklema...@gmail.com wrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. Eric Ben Root Took a bit of digging, but I knew I remembered this question before: http://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=1cad=rjaved=0CDMQFjAAurl=http%3A%2F%2Fmatplotlib.1069221.n5.nabble.com%2F2D-Quiver-in-Axes3D-td27944.htmlei=Pwk5UfGdLufv0QHuroD4BAusg=AFQjCNEqlWv2vY5l2IPcje-g6B0U21wDNwbvm=bv.43287494,d.dmQ And the feature request is here: https://github.com/matplotlib/matplotlib/issues/1026 In the thread I pointed out a bug that I encountered. I really hope I get some free time soon so that I can work on the various feature requests in mplot3d. Cheers! Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Is there a 3D version of the quiver plot?
On 8 March 2013 03:19, Brickle Macho bricklema...@gmail.com wrote: On 8/03/13 8:37 AM, Damon McDougall wrote: Correct me if I'm wrong, but would a 2D quiver plot on top of a contour plot work? What spaces does the surface map to/from? If your surface can be expressed as a function f:R^2 - R then it's equivalent to look at its level sets, rather than the 3D picture. You can then project the surface normals onto the plane and plot them with a 2D quiver plot. If you want to keep the z-component information, then you could colour the arrows according to the angle they make with the x-y plane. Does that make sense? My source is an image, so technically f:R^2 - R. Specifically I am using depth maps or (range image) what to visualise the surfaces/normals. I was planing on plotting the image as surface (hadn't work out how yet) and overlay the normal vectors. I think a 2D quiver plot on top of a contour plot may provide a useful visualisation/interpretation of the process. You always have the solution to install mayavi, a 3D plotting library. The API resemble maptlotlib's and it supports 3D quiver plots. Cheers, N Thanks for the idea. Brickle. -- I put the original feature request in, and I think it would be useful, but often I still find it easier to process two dimensional information. N.B. The above will only work for *functions* f:R^2 - R. To clarify, a sphere cannot be expressed this way, because the resulting mapping would be multivalued. Using this method, two distinct surface normals may have the same colour. Hope that makes sense. Best wishes, Damon Brickle. -- On 8/03/13 5:43 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 4:25 PM, Eric Firing efir...@hawaii.edu wrote: On 2013/03/07 9:19 AM, Benjamin Root wrote: On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho bricklema...@gmail.com mailto:bricklema...@gmail.com wrote: I have a list of surface normals I would like to plot. Is there a way to plot a 3D vectors in matplotlib similar to how quiver plots 2D vectors? Not at this time, but that would make a great feature request! I think the current roadblock to such a function is a bug with converting 2d arrow objects into 3d arrows. Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. Eric Ben Root Took a bit of digging, but I knew I remembered this question before: http://www.google.com/url?sa=trct=jq=esrc=ssource=webcd=1cad=rjaved=0CDMQFjAAurl=http%3A%2F%2Fmatplotlib.1069221.n5.nabble.com%2F2D-Quiver-in-Axes3D-td27944.htmlei=Pwk5UfGdLufv0QHuroD4BAusg=AFQjCNEqlWv2vY5l2IPcje-g6B0U21wDNwbvm=bv.43287494,d.dmQ And the feature request is here: https://github.com/matplotlib/matplotlib/issues/1026 In the thread I pointed out a bug that I encountered. I really hope I get some free time soon so that I can work on the various feature requests in mplot3d. Cheers! Ben Root -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and remains a good choice in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013
