Mailman 3 February 2016 - Matplotlib-users

Struggle with ticker.SymmetricalLogLocator()
by superchinchilla March 19, 2016

March 19, 2016

Hi, I want to make a symmetric logarithmic plot, but unfortunately the y-values are overlapping around 0. I don't want to display the first values around 0. I'm not sure how to use the ticker.SymmetricalLogLocator command to change the ticklocations or the tickfrequencies. I searched for a long time but didn't find any proper solution for it besides the examples for the normal Loglocater which didn't work. I tried to understand how the ticker.SymmetricalLogLocator(transform, subs=None) instance is working on the matplotlib documentation side which is not an easy target for me. I only want that the first ticklabes around zero are not displayed in my plot. I'm using the plt.yscale('symlog') command in order to plot it symmetrically around zero. My picture looks like <http://matplotlib.1069221.n5.nabble.com/file/n46753/heat1_raten1.png> Sorry for my bad English, thanx for any help in advance -- View this message in context: http://matplotlib.1069221.n5.nabble.com/Struggle-with-ticker-SymmetricalLog… Sent from the matplotlib - users mailing list archive at Nabble.com.

2 2

em-dash not correctly displayed in saved pdf when using tex
by Chao-Chin Yang March 15, 2016

March 15, 2016

Hi, I am having issues with producing an em-dash in pdf when using tex. A sample script is as below: #!/usr/bin/env python3 import matplotlib.pyplot as plt import math import numpy as np x = np.linspace(0, 2 * math.pi) y = np.cos(x) plt.plot(x, y) plt.suptitle(r"abc --- def") plt.savefig("test.pdf") plt.show() I have customized rc parameters: backend = “TkAgg” font.family = “serif” text.usetex = True image.cmap = “CMRmap" The plot rendered on screen looks fine. However, there are some weird characters showing up right before the em-dash in the saved pdf, as attached here. I am using Linux Mint 17.3, and uname -a gives Linux Eridanus 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux I am using python 3.4.3 + matplotlib 1.3.1, the latter of which is kind of old, but still remains the latest in the Ubuntu LTS repository. On the other had, I have installed the texlive-full package, which should include all the tex related packages. My dvipng is 1.14, and my ghostscript is 9.10. I have also tried different backends like Agg or PDF, but it makes no difference. I have tried googling around for similar issues, but had no luck. It would be very much appreciated If anyone had some idea how this comes about. Sincerely, Chao-Chin

5 8

What is the fastest way to plot map using Basemap and shapefile?
by sundar_ima March 12, 2016

March 12, 2016

As the title suggest What is the fastest way to plot map using Basemap and python? I have a requirement of plotting 100s of images for a area where basemap does not have the better resolution. Therefore I have choose to plot shapefile for boundary and basemap for projection. I have already read this file https://github.com/matplotlib/basemap/blob/master/examples/hires.py and it seems to be the way ahead for plotting maps faster. However, when I tried to do the same example for shapefile, the current axis gets removed. Here is my work flow:- import required modeules # initialise basemap m = Basemap(projection='merc', llcrnrlat=south, urcrnrlat=north, llcrnrlon=west, urcrnrlon=east, resolution='c', area_thresh=10000.) # I have a seperate plotting function def drawmap(data, string1, strin2, strin3): print 'Plotting the actual map.' F = plt.gcf() # Gets the current figure for later use ..... do some code def plot_variable(): .... some code # call the drawmap function drawmap(data, string1, strin2, strin3) plot_variable() If I use the following line just after Basemap instance all works fine without any error (though that is what I want as the boundaries wont be plotted later). The same line included with the def drawmap(data, string1, strin2, strin3): function also works fine but increases the plot time as it has to read every time the drawmap function is called. m.readshapefile('data/gis-data/NaturalEarth_10M_India_corrected/world_countries/ne_10m_admin_0_countries_lakes', 'ne_10m_admin_0_countries_lakes', drawbounds=True, linewidth=0.7) Then I tried to pickle the above line from outside the drawmap(data, string1, strin2, strin3) function and reload it after whenever drawmap is called. However, I get the following error:- F.add_axes(cax) # Adds the new axis to the figure as the current working axis File "/home/sundar/anaconda2/lib/python2.7/site-packages/matplotlib/figure.py", line 901, in add_axes raise ValueError(msg) ValueError: The Axes must have been created in the present figure Any solution for above or any I dea to plot faster is appreciated. -- View this message in context: http://matplotlib.1069221.n5.nabble.com/What-is-the-fastest-way-to-plot-map… Sent from the matplotlib - users mailing list archive at Nabble.com.

2 1

Graph similiar to necked_tensile_specimen.png
by sprobst76 March 11, 2016

March 11, 2016

Hello, in the examples I found a graph which is similar to a graph I want to have. However the example is only given as png and I want to have the code. The example is the necked_tensile_specimen.pngimage of the following example http://matplotlib.org/examples/images_contours_and_fields/interpolation_non… There is a 2D map which is compressed in the center. Does anybody has the code for the example? Thank you & best regards Stefan -- View this message in context: http://matplotlib.1069221.n5.nabble.com/Graph-similiar-to-necked-tensile-sp… Sent from the matplotlib - users mailing list archive at Nabble.com.

7 8

How to plot tick values in-place
by Ilja Honkonen March 10, 2016

March 10, 2016

Hello I haven't been able to find a solution to this problem with google, perhaps someone here can help. When I plot the following: import matplotlib.pyplot as plot plot.plot([0, 1e-9, 0, -1e-9]) plot.show() the y tick marks are shown as -1, -0.5, 0, 0.5, 1 and their scaling is given elsewhere, how can I make matplotlib write the entire number at tick location so I don't have to search for potential corrections to tick values in other parts of the plot? matplotlib.__version__ is '1.1.1'. Thanks! Ilja

2 1

Curve Fitting
by Saloni Rao March 9, 2016

March 9, 2016

Hi, I was trying to write some Ipython code for Non linear Model fitting for a complex formula( having polynomials in numerator and denominator). It has 3 variables for which data is available and 3 variable which have to be fitted. For data I have an excel file from which I am uploading the data. I tried using scipy.optimize, lmfit and kmpfit but failed badly. Could you suggest me a way to work around this problem? Thanks.

2 1

Installing matplotlib1.5.1 in python3.5 and linux
by msharmvikram March 9, 2016

March 9, 2016

Hi I am trying to install matplotlib 1.5.0 /1.5.1 version in my CentOS7 -- Python3.5 active machine. I have resolved all the dependencies stated in the INSTALL file and also have updated setuptools to latest one. However, to my bad luck i am not able to resolve this one particular issue shown in the image. <http://matplotlib.1069221.n5.nabble.com/file/n46786/matplotlib.png> I have tried following ways of install 1) pip3 install matplotlib==1.5.1 2) easy_install-3.5 -m matplotlib Both results in same above issue. I am clueless on what is the problem. Anyone solved this issue? -- View this message in context: http://matplotlib.1069221.n5.nabble.com/Installing-matplotlib1-5-1-in-pytho… Sent from the matplotlib - users mailing list archive at Nabble.com.

2 1

rotated axes within figure.
by Gustavo Goretkin Feb. 29, 2016

Feb. 29, 2016

Hello, (sorry if you get this message twice. I originally posted to the old sourceforge list) How can I add an axes to a figure, but specify the transform from axes coordinates to figure coordinates? I want a set of axes (ticks, spines, data, everything) that are rotated? Figure.add_axes [1] accepts a box left-bottom-width-height axis aligned box specification. I can't follow in the code where a transform is made out of that, but I basically want a generic transform. Do tick labels, ticks, titles, etc. assume that the axes-to-figure transform is purely a translation? [1] https://github.com/matplotlib/matplotlib/blob/e12d103a11cd08adbed348547bdb8… Thanks, Gustavo

2 2

Importing pylab
by hamid.rajabi Feb. 26, 2016

Feb. 26, 2016

Dear all, I have installed matplotlib modul on python 2.7 and it works perfectly. just when I want to import "pylab" module, I receive this error: " Traceback (most recent call last): File "<pyshell#2>", line 1, in <module> import pylab File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pylab.py", line 1, in <module> File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/pylab.py", line 231, in <module> import matplotlib.finance File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/finance.py", line 38, in <module> from matplotlib.collections import LineCollection, PolyCollection File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/collections.py", line 27, in <module> import matplotlib.backend_bases as backend_bases File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backend_bases.py", line 56, in <module> import matplotlib.textpath as textpath File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/textpath.py", line 19, in <module> import matplotlib.font_manager as font_manager File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/font_manager.py", line 58, in <module> from matplotlib import ft2font ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/ft2font.so, 2): Library not loaded: @loader_path/../../../libfreetype.6.dylib Referenced from: /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/ft2font.so Reason: image not found " Please Help me. -- View this message in context: http://matplotlib.1069221.n5.nabble.com/Importing-pylab-tp46800.html Sent from the matplotlib - users mailing list archive at Nabble.com.

1 0

Re: [Matplotlib-users] matplotlib at LIGO/GW observation
by Kathleen Tacina Feb. 16, 2016

Feb. 16, 2016

I've occasionally put software like matplotlib in the Acknowledgements section, and included a reference there. I wasn't aware of \nocite, I may use it in the future. On 2/16/16 4:48 PM, matplotlib-users-request(a)python.org wrote: > Re: matplotlib at LIGO/GW observation

3 2