Adding Arrows to polar plots

Hi all,

what is the native "data" coordinate system for Arrows in a polar plot ?

How do I add arrows to a polar plot ?

An example would be appreciated.
fig = figure(figsize=(12,12))
ax = fig.add_subplot(111, polar=True)

Nils

I don’t know if it is an existing feature or not. If it isn’t, then I think a feature request should be filed. If it is, then a request should be filed anyway for an example to be added to the gallery.

Ben Root

···

On Fri, Oct 14, 2011 at 3:42 AM, Nils Wagner <nwagner@…1052…> wrote:

Hi all,

what is the native “data” coordinate system for Arrows in

a polar plot ?

How do I add arrows to a polar plot ?

An example would be appreciated.

fig = figure(figsize=(12,12))

ax = fig.add_subplot(111, polar=True)

Nils

Done. See https://github.com/matplotlib/matplotlib/issues/542

Nils

···

On Wed, 19 Oct 2011 15:45:07 -0500 Benjamin Root <ben.root@...1304...> wrote:

On Fri, Oct 14, 2011 at 3:42 AM, Nils Wagner > <nwagner@...1052...>wrote:

Hi all,

what is the native "data" coordinate system for Arrows in
a polar plot ?

How do I add arrows to a polar plot ?

An example would be appreciated.
fig = figure(figsize=(12,12))
ax = fig.add_subplot(111, polar=True)

Nils

I don't know if it is an existing feature or not. If it isn't, then I think
a feature request should be filed. If it is, then a request should be filed
anyway for an example to be added to the gallery.

Ben Root

Hi Ben,

it seems to work in general, but how can I increase the size of the arrowhead ?

from pylab import figure, arrow, show
import numpy as np
fig = figure(figsize=(15,15))
ax = fig.add_subplot(111, polar=True)
ax.arrow(0.0,0.0,np.pi/4,0.3,lw=2)
ax.arrow(0.0,0.0,np.pi/2,0.4)
show()

Nils

···

On Wed, 19 Oct 2011 15:45:07 -0500 Benjamin Root <ben.root@...1304...> wrote:

On Fri, Oct 14, 2011 at 3:42 AM, Nils Wagner > <nwagner@...1052...>wrote:

Hi all,

what is the native "data" coordinate system for Arrows in
a polar plot ?

How do I add arrows to a polar plot ?

An example would be appreciated.
fig = figure(figsize=(12,12))
ax = fig.add_subplot(111, polar=True)

Nils

I don't know if it is an existing feature or not. If it isn't, then I think
a feature request should be filed. If it is, then a request should be filed
anyway for an example to be added to the gallery.

Ben Root