Re: [Matplotlib-users] How do I make a Mercator map larger

[Arnaldo Russo]

Hi Martin,

Have you tried to save your figure and check if it does not enlarge your
figure?

plt.savefig("mercator.png")

Cheers,
Arnaldo.

---
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2016-01-03 20:20 GMT-02:00 Martin McGlensey :

> Hello,
>
>
>
> I’m a new user to both python and basemap. I’ve got my map working OK, but
> would like to make it larger on the display. I’ve tried the height and
> width parameters in the map definition (m=basemap(…) and
> plt.figure(figuresize=(x,y)). Neither appear to have any effect on the size
> of the map.
>
>
>
> Is there an easy way to convert map coordinates to inches?
>
>
>
> Thanks,
>
> Marty
>
>
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Re: [Matplotlib-users] Produce KML from Matplolib

[Arnaldo Russo]

Hi Egayer,

Filipe Fernandes spoted a nice result using Simplekml and Basemap.

https://ocefpaf.github.io/python4oceanographers/blog/2014/03/10/gearth/

Cheers,
Arnaldo.


2015-06-10 5:07 GMT-03:00 egayer :

> Hi all,
>
> Is there a way to produce a KML file from matplolib results as R and Matlab
> do ?
>
> - plotKML is a R package http://plotkml.r-forge.r-project.org
> - Matlab has the Google Earth Toolbox.
>
> Both of them allow to plot directly on GE
>
> I' have been digging around and found this old post :"Producing a
> KML-friendly (Google Earth) image" but nothing about how to actually a
> matplolib result as a KML file useable into Google Earth.
>
> I have seen some shape to KML packages, but nothing about raster.
>
> The ultimate goal being to use the "plot, mplot3d, imshow, etc..." to plot
> any python array on GE.
>
> Thanks for your help
> Eric
>
>
>
>
>
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Re: [Matplotlib-users] Multiplot with one colorbar

[Arnaldo Russo]

Hi,
.
Your example is not much clear. It's better post some short example and a
running piece of code.
btw, maybe your problem should be solved with this post:
http://stackoverflow.com/questions/13784201/matplotlib-2-subplots-1-colorbar

Cheers,
Arnaldo


---
*Arnaldo D'Amaral Pereira Granja Russo*
Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG



2015-03-06 6:36 GMT-03:00 Dyah rahayu martiningrum :

> Hello all,
>
> I make multi plot with colorbars. I need help, how do make only one
> colorbar for six panels? I also want to show only lowest x-axis. I copy my
> recent code and  figure here.
>
># Open file
> fd = nc.Dataset(fname, 'r')
>
> # Read variables
> beam = fd.variables['beam'][:]
> rng = fd.variables['range'][:]
> tim = fd.variables['time'][:]
> pwr = fd.variables['pwr'][:]
> nfft = fd.variables['nfft'][0]
> pn = fd.variables['pnoise'][:]
> width=fd.variables['width'][:]
> # Close netCDF file
> fd.close()
>
> # Specify beam
> ibeam = ibeams[i]
>
> # Time convertion
> tim = tim/3600.0
>
> #Plot
> p_plot = pwr[ibeam]
> for it in range(len(tim)):
> p_plot[it] = p_plot[it] - pn[ibeam][it] - 10.*np.log10(nfft)
> p_plot = p_plot.transpose()
>
> #Specify subplot
> pl.subplot(611 + i)
> #Contour plot
> v= np.linspace(5., 50., 5., endpoint=True)
> x= pl.contourf(tim, rng, p_plot, v, cmap=pl.cm.jet)
> x = pl.colorbar(ticks=v)
> x.ax.set_title('dB')
> print x
>
>
> # Set X and Y axis lower/uppser limit
> set_xy = range(4)
> set_xy[0] = 18.0 # x min
> set_xy[1] = 30.0 # x max
> set_xy[2] = 200.0 # y min
> set_xy[3] = 550.0 # y max
> pl.axis(set_xy)
>
> # Set labels
> pl.xlabel('time (hours)')
> pl.ylabel('range (km)')
> pl.show()
>
>
> Thank you
>
>
>
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Re: [Matplotlib-users] Include \hline on table inside figure

[Arnaldo Russo]

Hi Tom,

Thanks for the tip, I'll take a look.
Concerning the TeX behavior, do you know what is going on?

Cheers,
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[Matplotlib-users] Include \hline on table inside figure

[Arnaldo Russo]

Hi,

I'm dealing with this issue but no clues I have found!
When I use simple matplotlib engine, my plot does not render the correct
font (which I have set to Arial) but it renders the \hline and specif
spaces in the table inserted inside the figure area [Fig 1]
.

In the second try, using Xelatex engine (made possible by mpl.use('pgf') ),
I get correct Arial font but my table inside becomes a mess [Fig 2]
.

Does anyone knows what is the difference between the two codes [Code]
, and how should
I get a figure with Arial font and a table inside the figure area?

It's strange when I have to deal with latex codes and matplotlib... In a
simple plot (whitout LaTeX elements) I'd have set simply: font.family:
["sans-serif"] and font.sans-serif: ["Arial"].

Is there a way to include tables inside a figure with another approach
(e.g. whithout using LaTeX)?

At least but not less important: The figures in their different part of the
[Code] , must be
executed in different session. If I run everything in a simple console, I
really dont know which parameter is maintained, but Arial is not used (in
the second plot).


[Fig 1] http://imgur.com/J1A01h5
[Fig 2] http://imgur.com/4TckUyb
[Code] https://gist.github.com/arnaldorusso/e542b04245560300d4f7

Thank you all!

Cheers,
Arnaldo.
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Re: [Matplotlib-users] How to use full path of font inside matplotlibrc - Arial not loading

[Arnaldo Russo]

Thanks Benjamin!!

In fact, this folder was inside .cache/matplotlib
I have removed the entire content, and know matplotlib seems to recognize
Arial font.

Cheers,
Arnaldo
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[Matplotlib-users] How to use full path of font inside matplotlibrc - Arial not loading

[Arnaldo Russo]

I have Arial font installed in my system:

/usr/share/fonts/truetype/msttcorefonts/Arial_Bold_Italic.ttf
/usr/share/fonts/truetype/msttcorefonts/arialbi.ttf
/usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf
/usr/share/fonts/truetype/msttcorefonts/arial.ttf
/usr/share/fonts/truetype/msttcorefonts/ariali.ttf
/usr/share/fonts/truetype/msttcorefonts/arialbd.ttf
/usr/share/fonts/truetype/msttcorefonts/Arial.ttf
/usr/share/fonts/truetype/msttcorefonts/Arial_Italic.ttf
/usr/share/fonts/truetype/msttcorefonts/Arial_Black.ttf
/usr/share/xbmc/media/Fonts/arial.ttf
/usr/local/share/texmf/fonts/tfm/urw/arial
/usr/local/share/texmf/fonts/afm/urw/arial
/usr/local/share/texmf/fonts/vf/urw/arial
/usr/local/share/texmf/fonts/type1/urw/arial

I have changed inside my matplotlibrc including the line:

font.sans-serif  : Arial

If I check inside IPython:

import matplotlib.pyplot as plt
plt.plot([1,2,3,4,5,], '*')
t = plt.ylabel(r'1, 2, 3, 8, 9 6 11 Testing Label')
print(t.get_fontname())

The output is:

myhome/local/lib/python2.7/site-packages/matplotlib-1.4.2-py2.7-linux-
x86_64.egg/matplotlib/font_manager.py:1279: UserWarning: findfont: Font
family [u'sans-serif'] not found. Falling back to Bitstream Vera Sans
(prop.get_family(), self.defaultFamily[fontext]))

Bitstream Vera Sans

How can I change this behavior and use Arial fonts for all of my plots?
Why Arial font is not loaded?

It is interesting, that if I use Seaborn, it returns `Liberation Sans`
where the first font (inside internal font list) is Arial and the second is
`Liberation Sans`.

I have also tried to set the full path of my Arial font:

import matplotlib as mpl
import matplotlib.pyplot as plt
import matplotlib.font_manager as font_manager
import seaborn as sns

path = '/usr/share/fonts/truetype/msttcorefonts/Arial.ttf'
prop = font_manager.FontProperties(fname=path)
mpl.rcParams['font.family'] = prop.get_name()


sns.set_style("whitegrid")
plt.plot([1,2,3,4,5,], '*')
t = plt.ylabel(r'1, 2, 3, 8, 9 6 11 Testing Label')
print(t.get_fontname())

It returns `Liberation Sans`. Any clues? (aka http://goo.gl/V511ux) =]


Cheers,
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Re: [Matplotlib-users] (no subject)

[Arnaldo Russo]

Hi,

Thanks a lot for the clue, Pierre.
Unicode fix this thread, at least for my case.

Cheers,
Arnaldo.


---
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Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG



2014-09-08 7:06 GMT-03:00 Pierre Haesssig :

>
> Le 05/09/2014 21:53, Arnaldo Russo a écrit :
>
>> The following code plots my table, but greek letters are not in Arial.
>>
> What about adding greek letters directly with a Unicode string and keeping
> LaTex only for the table?
>
> best,
> Pierre
>
> (my greek and math unicode "copy-pasting files" attached)
>
>
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Re: [Matplotlib-users] (no subject)

[Arnaldo Russo]

Hi Tobi and others,

I have tested include other packages (e.g \usepackage{cmbright} ), but it
seems to not solve my problem.
Including on matplotlibrc, exactly the lines as you said, my output is the
same as I have attached (Matplotlib To.png).
On pure LaTex, I really don't know how it should be charged. I have tried
this:

\documentclass{report}
\usepackage{fontspec}\setmainfont{Arial}\setmathrm{Arial}\setmathsf{Arial}\setmathtt{Arial}\usepackage{amsmath}
\begin{document}
$\mu$text $\eta$text $\cdot$ m$^{-2}$ s$^{-1}$
\end{document}


Thanks


---
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Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG




2014-09-06 6:19 GMT-03:00 Tobias Winchen :

> Hi,
>
> On Friday 05 September 2014 16:53:47 Arnaldo Russo wrote:
> > I'm trying to figure out how I could use greek letters on axis labels,
> > without italic.
> > I have read a lot about alternatives, but I do need to use LaTeX to
> insert
> > a table inside the plot area.
>
> I use the sfmath package together with the sans-serif latex fonts in
> matplotlib. The relevant lines in my matplotlibrc are:
>
> font.family: sans-serif
> font.serif : Computer Modern Roman, Times, Palatino,
> font.sans-serif: Computer Modern Sans serif, Helvetica, Avant Garde,
> font.cursive   : Zapf Chancery
> font.monospace : Courier, Computer Modern Typewriter
>
> text.latex.unicode : True
> text.latex.preamble : \usepackage{lmodern},\usepackage{sfmath},
> \usepackage{amsmath}, \usepackage{amssymb}, \usepackage{siunitx},
>
> This should do what you want?
>
> Best regards,
>
>
> Tobi
>
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[Matplotlib-users] (no subject)

[Arnaldo Russo]

Hi,

I'm trying to figure out how I could use greek letters on axis labels,
without italic.
I have read a lot about alternatives, but I do need to use LaTeX to insert
a table inside the plot area.

Using mathtex it responds with normal font on greek letters.

What I`m doing wrong?

The following code plots my table, but greek letters are not in Arial.

import numpy as npimport matplotlib.pyplot as plt

t2 = np.arange(100)
fig  = plt.figure(figsize=(8,4))
ax = fig.add_subplot(111)

plt.rcParams.update({'font.family' : 'sans-serif',
'font.sans-serif' : 'Arial',
'font.style' : 'normal',
'xtick.labelsize' : 12,
'ytick.labelsize' : 12,
'mathtext.fontset' : 'stixsans',
'mathtext.default': 'regular',
'mathtext.tt' : 'Arial',
 })
plt.subplots_adjust(left=0.12, right=0.95, top=0.95, bottom=0.1)


ax.set_xlim(0,100)
xvals = [0, 16.6, 33.33, 50, 66.66, 83.33, 100]
ax.set_xticks(xvals)
ax.set_xticklabels(['tick 0', 'tick 1', 'tick 2','tick 3', 'tick 4',
'tick 5', 'tick 6'])
ax.set_ylabel(r'$\mu$text $\eta$text $\cdot$ m$^{-2}$ s$^{-1}$')
ax.set_yticklabels(['0', '200', '400', '600', '800', '1000', '1200', '1400'])
ax.plot(t2, color='black')
ax.fill_between(np.arange(0, len(t2)),t2,0, color='black', alpha=0.8)

from matplotlib import rc
rc('font',**{'family':'sans-serif','sans-serif':['Arial']})
rc('text', usetex=True)
table = r'''\begin{tabular}{lccc}\hline&tick 0& tick 1 & tick 2 &
tick 3 & tick 4 & tick 5 & tick 6 \\\hline Vals & 32.00 & 3.28 & 5.80
& 5 & 8 & 45 & 7.3 \\\hline \end{tabular}'''
plt.text(20,80,table,size=10)

plt.show()


And an example using Mathtex, using regular fonts work out of the box, but
my table of course is included as plain text. I have to close my IPython
session and start it again to correct usage of plot parameters.

import numpy as npimport matplotlib.pyplot as plt

t2 = np.arange(100)
fig  = plt.figure(figsize=(8,4))
ax = fig.add_subplot(111)

plt.rcParams.update({'xtick.labelsize' : 12,
'ytick.labelsize' : 12,
'mathtext.fontset' : 'stixsans',
'mathtext.default': 'regular',
'mathtext.tt' : 'Arial',
})
plt.subplots_adjust(left=0.12, right=0.95, top=0.95, bottom=0.1)


ax.set_xlim(0,100)
xvals = [0, 16.6, 33.33, 50, 66.66, 83.33, 100]
ax.set_xticks(xvals)
ax.set_xticklabels(['tick 0', 'tick 1', 'tick 2','tick 3', 'tick 4',
'tick 5', 'tick 6'])
ax.set_ylabel(r'$\mu$text $\eta$text $\cdot$ m$^{-2}$ s$^{-1}$')
ax.set_yticklabels(['0', '200', '400', '600', '800', '1000', '1200', '1400'])
ax.plot(t2, color='black')
ax.fill_between(np.arange(0, len(t2)),t2,0, color='black', alpha=0.8)
#from matplotlib import
rc#rc('font',**{'family':'sans-serif','sans-serif':['Arial']})#rc('text',
usetex=True)
table = r'''\begin{tabular}{lccc}\hline&tick 0& tick 1 & tick 2 &
tick 3 & tick 4 & tick 5 & tick 6 \\\hline Vals & 32.00 & 3.28 & 5.80
& 5 & 8 & 45 & 7.3 \\\hline \end{tabular}'''
plt.text(20,80,table,size=10)

plt.show()


Regards,
Arnaldo.

---
*Arnaldo D'Amaral Pereira Granja Russo*
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Re: [Matplotlib-users] violin plot

[Arnaldo Russo]

Hi Neal,
I don't know if you need exclusively matplotlib tools to apply your violin
plot, but seaborn package [1, 2] do this very well.
I hope you enjoy it!
Cheers,
Arnaldo.

[1]
http://web.stanford.edu/~mwaskom/software/seaborn/examples/violinplots.html
[2] https://github.com/mwaskom/seaborn


---
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Instituto de Oceanografia - FURG




2014-08-27 12:15 GMT-03:00 Neal Becker :

> I'm pleased to see violinplot added to mpl-1.4.  One question.  I might
> like to
> annotate with some statistic.  Like boxplot can show quantiles.  I might
> like to
> show either quantiles, or some other statistic (3 sigma) on my violinplot.
> After all, violinplot is advertised as an improved boxplot, but it seems
> to be
> missing this feature.
>
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>
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Re: [Matplotlib-users] How to put the label above horizontal colorbar?

[Arnaldo Russo]

Dear Chao,

You could try this,

import matplotlib
import matplotlib.pyplot as plt

# create a color bar with:
sm = plt.cm.ScalarMappable(cmap=plt.get_cmap('Reds'))
sm.set_array(range(10))

# create an horizontal colorbar and put the ticks on the top.
# in your case, you could plot colorbar on top, and tick at 'bottom'
cb = plt.colorbar(sm, orientation='horizontal', location=1.0)
cb.ax.xaxis.set_ticks_position('top')
plt.show()

Another way, you could find useful a function written by Ryan May [0]

Hope that fits.

Arnaldo.

[0]
https://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg07447.html


---
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Instituto de Oceanografia - FURG




2014-03-10 14:39 GMT-03:00 Chao YUE :

> Dear all,
>
> I am using the matplotlib 1.2.0 version, is there some way to put the
> label above the horizontal colorbar? like in the attached example, I would
> like the labels to be shown above the colorbar?
>
> thanks a lot in advance,
>
> Cheers,
>
> Chao
>
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Re: [Matplotlib-users] Newbie-question: spines with arrows

[Arnaldo Russo]

Hi Mark,

I really didn't tested anything about yours sketch... But I think
"AxisArtist" could be of any help.
http://matplotlib.sourceforge.net/mpl_toolkits/axes_grid/users/overview.html#axisartist

Good luck.

Cheers,
Arnaldo.
---
*Arnaldo D'Amaral Pereira Granja Russo*
Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG





2012/6/15 Asbach, Mark 

>  Hi there,
>
> I'm sorry to ask such a newbie question, but I'd like to format a custom
> box plot and although there are numerous examples on the web and tons of
> docstrings in matplotlib, I'm stuck somehow. My problems center around axes
> / spines. In detail, my problems are:
>
> 1) I want an y-axis on the left that spans from -0.6 to 1.1, ends in an
> arrow, has major ticks at 0 and 1 and minor ticks at [0.1...0.9]
> As far as I understand, there is no option to let spines end in an arrow
> head, so I have to draw the myself. I get the ticks to appear at the right
> positions and the y-range to be as desired - however, the spine line is not
> drawn over the full y-range, but only where there is data in the diagram.
> Also, I copied the arrow annotation code blindly from an older post on this
> list, but do not understand how I can adapt the arrow head to appear at a
> data position (instead of at the corner of the Axes area). One problem is,
> that I get ticks on the right although that spine was disabled.
>
> 2) I want some kind of x-axis at y==0, without ticks and without arrow
> Using some methods on the spines, I can disable the top spine and move the
> bottom spine to zero. However, as with the y-axis, I cannot control from
> where to where the line itself is drawn.
>
> As attachments, you'll find a hand sketch of what my graph should look
> like and matplotlib code that goes nearly all the way.
>
> I would be very happy about a hint on how to fix the problems left.
>
> Thanks an advance,
> Mark
>
>
>
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Re: [Matplotlib-users] netcdf4-python

[Arnaldo Russo]

Hi John,

Have you tried pupynere module?
http://pypi.python.org/pypi/pupynere/
https://bitbucket.org/robertodealmeida/pupynere/

[ ]
---
*Arnaldo D'Amaral Pereira Granja Russo*
Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG





2012/5/4 John 

> Hello,
>
> I'm working with the latest netcdf4-python (svn updated recently). It
> has been built with the Netcdf 4.1.1 and HDF 4.2.5 and HDF5 1.8.5
> patch libraries. The installation is on Ubuntu 64bit 10.04 LTS.
>
> I get some very strange behavior when trying to read a file, which
> actually causes Ipython to close:
> In [3]: from netCDF4 import DataSet as NetCDFFile
> In [4]: nci = NetCDFFile('100730_tawo_TAWO-var.nc')
> python: v1hpg.c:190: v1h_get_nc_type: Assertion `type == NC_BYTE ||
> type == NC_CHAR || type == NC_SHORT || type == NC_INT || type ==
> NC_FLOAT || type == NC_DOUBLE' failed.
> Aborted
> $
>
> Does anyone have a suggestion where to look for the root cause of
> this? From the searches I've done it seems it is likely related to the
> dynamic linking of the libraries at build time.
>
> Thank you,
> john
>
>
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Re: [Matplotlib-users] How to draw maps like in m_map tool?

[Arnaldo Russo]

Hi matplotlib users.
Has anyone gave the first steps or finished a patch for this?
I don't have enough knowledge to propose one, but I could try to help in
any improvement or testing.
Thank you,
Arnaldo.

---
*Arnaldo D'Amaral Pereira Granja Russo*
Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG

Jeff Whitaker  writes:

>
>
> On 1/2/11 9:17 PM, Linuxer Wang wrote:
>
>
>   Hi, Jeff
>   Sorry for the confusion. Yes, I mean to draw the black/white
>   border (called fancy box in m_map). Drawing the maps is really
>   easy to use, thanks for your great Api. Is there plan to support
>   the fancy border feature in near future?
>
>
> No, but patches are welcome.
> -Jeff
>   Thank you for replying.
>   On 01/02/2011 06:09 PM, Jeff Whitaker wrote:
>
> On 1/2/11 1:01 PM, Linuxer Wang wrote:
>
>   This may be a question for Jeffrey Whitaker but welcome
>   anyone's help.
>   I used to use the m_map tool for matlab (
http://www.eos.ubc.ca/~rich/map.html).
>
>
>
>
>   Does anybody know how to draw the same maps in matplotlib
>   (BaseMap)? Specifically, how to draw axes in such figures:
http://www.eos.ubc.ca/~rich/private/extblueocean.gif
>   or http://www.eos.ubc.ca/~rich/private/exmiller.gif
>   ?
>   Thanks a lot.
>
> Can you be more specific about what you need help with?  Is it
> drawing the map itself, or drawing the lines on the map?
> examples/nytolondon.py shows how to draw great circles, which is
> similar to the extblueocean.gif example.
> If you are asking how to draw that black and white border around
> the map, that is not supported.  However, it is easy to draw
> labelled meridians and parallels (with the drawparallels and
> drawmeridians class methods).  Docs are at
http://matplotlib.sourceforge.net/basemap/doc/html/api/index.html,
> and there are lots of examples in the 'examples' directory of
> the source distribution.
> HTH,
> -Jeff
>
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