[Matplotlib-users] Linewidths in data space?
I have a collection of Patches and Lines that have their coordinates in data space, i.e. like in the following example: import matplotlib.pyplot as plt import matplotlib.patches as mpatches import matplotlib.collections as mcollections import matplotlib.lines as mlines fig = plt.figure() ax = fig.add_subplot(111) patches = [] patches.append(mlines.Line2D((0,1),(0,1), linewidth=1)) patches.append(mpatches.Circle((0,0), 0.25, linewidth=1)) patches.append(mpatches.Circle((1,1), 0.25, linewidth=1)) coll = mcollections.PatchCollection(patches) ax.add_collection(coll) ax.autoscale_view() plt.show() Now, in this example the line width is always given with respect to the screen space, i.e. does not change when I zoom into the plot. Is it possible to specify a linewidth with respect to data space? I.e. to say that a line (in both the Line2D and the Circle) should be let's say 0.1 in data space, and thus scale accordingly if I zoom in? -Michael -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Impossible to draw a direction of arrows in Matplotlib???
I'm not sure that I understand exactly what you are trying to do, but
you may want to look into Matplotlib annotation. Here's a really quick
example:
import matplotlib.pyplot as plt
plt.annotate('', (1, 1), (0, 0),
arrowprops=dict(facecolor='black'))
plt.axis([-1, 2, -1, 2])
plt.show()
There are many options to make very fancy arrows, and there are several
places in the docs to read about this in more detail:
http://matplotlib.org/users/annotations_intro.html
http://matplotlib.org/users/annotations_guide.html
Hope that helps a little. Good luck.
Ryan
On 4/12/2013 5:55 AM, Bakhtiyor Zokhidov wrote:
Hi,
I have encountered some problem while I was drawing a direction of
arrow. I have point (x,y) coordinates and angle of them. What I want to
do is that to draw arrow according to the given angle (just to show the
point direction as an arrow in each point coordinate). Here, we should
assume coordinates of '+x', '+y', '-x ', '-y' are 90, 0, 270, 180
degrees, respectively.
I am a bit unfamiliar with Python drawing tools. I am still not sure to
draw directional point (arrow based on angle) whether I use pylab or
some other modules or.. still not sure at all. I put the following codes
as a sample to give better description:
import numpy as np
import scipy as sp
import pylab as pl
def draw_line(x,y,angle):
# Inputs:
x = np.array([ 2, 4, 8, 10, 12, 14, 16])
y = np.array([ 5, 10, 15, 20, 25, 30, 35])
angles = np.array([45,275,190,100,280,18,45])
# First, draw (x,y) coordinate
???
# Second, according to the angle indicate the direction as
an arrow
???
Thanks in advance for your friendly support,
--
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Re: [Matplotlib-users] Impossible to draw a direction of arrows in Matplotlib???
Message: 1 Date: Fri, 12 Apr 2013 13:55:32 +0400 From: Bakhtiyor Zokhidov bakhtiyor_zokhi...@mail.ru Subject: [Matplotlib-users] Impossible to draw a direction of arrows in Matplotlib??? Hi, I have encountered some problem while I was drawing a direction of arrow. I have point (x,y) coordinates and angle of them. What I want to do is that to draw arrow according to the given angle (just to show the point direction as an arrow in each point coordinate). Here, we should assume coordinates of '+x', '+y', '-x ', '-y' are 90, 0, 270, 180 degrees, respectively.? I am a bit unfamiliar with Python drawing tools. I am still not sure to draw directional point (arrow based on angle) whether I use pylab or some other modules or.. still not sure at all. I put the following codes as a sample to give better description: I see the potential for some confusion over the direction of arrows on a plot here. In standard trigonometry angles of 0, 90, 180, 270 degrees lie along '+x' (1, 0), '+y' (0, 1), '-x' (-1, 0) and '-y' (0, -1). Totally different to what you want. However, this is obviously different to the compass rose. Dr Andrew Nelson andyf...@gmail.com _ -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] basemap scatter
I'm afraid the scatter plot does not allow afterward adjustment with size currently (by using setp). Probably you should redraw the scatter points with different sizes. like for x,y,z in zip(xlist,ylist,sizelist): m.scatter(x,y,s=z) if you question is to change the real 2km or 1.5km to the size on the map, sorry I don't know as I never did this. Probably you need consider projection. Chao On Fri, Apr 12, 2013 at 4:33 PM, marz_cyclone [via matplotlib] ml-node+s1069221n40883...@n5.nabble.com wrote: Hi all, I'm trying to do a scatter plot within a map created by basemap. m = Basemap(projection='ortho',lat_0=45,lon_0=0,resolution='l') X,Y = m(lon,lat) m.scatter(X,Y,s=sizes,c=data,edgecolor='none') This works fine. Now I want to change the sizes of the markers so that the marker at point A has a size that corresponds to circle with radius of 2.5 km, point B to 1.5 km, and so on. Has anyone ever done this? Thanks in advance. Mario Mech -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Matplotlib-users mailing list [hidden email] http://user/SendEmail.jtp?type=nodenode=40883i=0 https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- If you reply to this email, your message will be added to the discussion below: http://matplotlib.1069221.n5.nabble.com/basemap-scatter-tp40883.html To start a new topic under matplotlib - users, email ml-node+s1069221n...@n5.nabble.com To unsubscribe from matplotlib, click herehttp://matplotlib.1069221.n5.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_codenode=2code=Y2hhb3l1ZWpveUBnbWFpbC5jb218MnwxMzg1NzAzMzQx . NAMLhttp://matplotlib.1069221.n5.nabble.com/template/NamlServlet.jtp?macro=macro_viewerid=instant_html%21nabble%3Aemail.namlbase=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespacebreadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml -- *** Chao YUE Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL) UMR 1572 CEA-CNRS-UVSQ Batiment 712 - Pe 119 91191 GIF Sur YVETTE Cedex Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16 -- View this message in context: http://matplotlib.1069221.n5.nabble.com/basemap-scatter-tp40883p40884.html Sent from the matplotlib - users mailing list archive at Nabble.com.-- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
