Comments for Comfort at 1 AU http://oneau.wordpress.com Some articles, notes and such. Thu, 02 May 2013 13:15:39 +0000 hourly 1 http://wordpress.com/ Comment on Line id plot by Tsana http://oneau.wordpress.com/2011/10/01/line-id-plot/#comment-409 Thu, 02 May 2013 13:15:39 +0000 http://oneau.wordpress.com/?p=425#comment-409 Thanks for your help. It all works perfectly with the QT4AGG backend. (Previously I was using the MacOSX (ie default for me) backend.)

]]> Comment on Line id plot by Prasanth http://oneau.wordpress.com/2011/10/01/line-id-plot/#comment-408 Thu, 18 Apr 2013 11:39:13 +0000 http://oneau.wordpress.com/?p=425#comment-408 Hello,

Are you using the “GTKAgg” backend? This is a known issue https://github.com/phn/lineid_plot/issues/1 . Try other backends such as WXAgg or Qt4Agg. If you are finding it hard to install these backends, then try the Enthought Python Distribution or the Annaconda distribution from Continuum Analytics.

Unfortunately I can’t look into this in more detail.

]]> Comment on Line id plot by Tsana http://oneau.wordpress.com/2011/10/01/line-id-plot/#comment-407 Thu, 18 Apr 2013 10:52:18 +0000 http://oneau.wordpress.com/?p=425#comment-407 Hi, this module is awesome and is saving me a lot of time placing labels manually. I just have one small problem, which might be an issue with my system/install in which case, sorry for bothering you!

All the lines and labels are appearing, but they tend to overlap. I get this error message:
Traceback (most recent call last):
File “”, line 1, in
File “/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/lineid_plot.py”, line 405, in plot_line_ids
b_ext = box.get_window_extent()
File “/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/text.py”, line 745, in get_window_extent
raise RuntimeError(‘Cannot get window extent w/o renderer’)
RuntimeError: Cannot get window extent w/o renderer

Any idea how to fix this? I have a temporary workaround involving blank labels and cheating with \n but it would be awesome to get it working properly.

In any case, thank-you for creating this module.

]]> Comment on Latex equations using SymPy by amrudesh http://oneau.wordpress.com/2011/12/25/latex-sympy/#comment-399 Mon, 24 Dec 2012 13:35:13 +0000 http://oneau.wordpress.com/?p=486#comment-399 Hi Prashanth,
Thnx . I checked . It seems to have not changed to “integrate” . Now, it works.. :)

]]> Comment on Latex equations using SymPy by Prasanth http://oneau.wordpress.com/2011/12/25/latex-sympy/#comment-398 Mon, 24 Dec 2012 13:24:33 +0000 http://oneau.wordpress.com/?p=486#comment-398 Hello,

Integral is from sympy itself. Look at examples at http://docs.sympy.org/0.7.2/tutorial.html .

]]> Comment on Latex equations using SymPy by amrudesh http://oneau.wordpress.com/2011/12/25/latex-sympy/#comment-397 Mon, 24 Dec 2012 13:13:29 +0000 http://oneau.wordpress.com/?p=486#comment-397 Hi,
Thnx for the post. Really helped me setup sympy and get the latex equation. I had to make a few updates though in the syntax (not sure if it was because of a version change). For your first example, I had to use,
import sympy
x = sympy.symbols(“x”)
a = 1/( (x+2)*(x+1) )
print sympy.latex(a)

But then, could you tell me where the “Integral” function comes from in python? Guess I dont have the right libraries. Is it from scipy? I see only scipy.integrate.

Thanks in advance for ur reply..
-amrudesh

]]> Comment on Python for Astronomy by Michael Roberts http://oneau.wordpress.com/2010/10/02/python-for-astronomy/#comment-391 Tue, 30 Oct 2012 00:49:05 +0000 http://oneau.wordpress.com/?p=202#comment-391 This is awesome, I may nab this for my own blog! I will of course, give full credit! :) Excellent stuff!

]]> Comment on Simple statistics with SciPy by E. John http://oneau.wordpress.com/2011/02/28/simple-statistics-with-scipy/#comment-390 Fri, 19 Oct 2012 23:19:48 +0000 http://oneau.wordpress.com/?p=347#comment-390 Beautiful. Thanks.

]]> Comment on Simple formatted tables in python with Texttable by Find on beautiful soup in loop returns TypeError http://oneau.wordpress.com/2010/05/30/simple-formatted-tables-in-python-with-texttable/#comment-389 Wed, 01 Aug 2012 12:38:11 +0000 http://asimpleweblog.wordpress.com/?p=88#comment-389 [...] http://oneau.wordpress.com/2010/05/30/simple-formatted-tables-in-python-with-texttable/ [...]

]]> Comment on Julian dates for proleptic Gregorian and Julian calendars by Prasanth http://oneau.wordpress.com/2011/08/30/jdcal/#comment-388 Sat, 05 May 2012 03:42:11 +0000 http://oneau.wordpress.com/?p=408#comment-388 Oh, this could be a very different thing: the Julian Epoch of the observation date, and not the calendar date as a decimal year!!! Now you can see why there can be a lot of confusion regarding dates!

The only way to be absolutely sure is to ask them directly. If not, I think it would safe to assume that this is the Julian epoch, and not calendar date as decimal year. There are two epochs: Julian and Besselian. Modern, i.e., on and after 1980.0, values are always supposed to be Julian epochs.

I have updates the Gist with two functions, and a constant, that can calculate the Julian Epoch of a given JD, and vice-versa.


In [3]: jepoch2jd(2007.23467)
Out[3]: (2400000.5, 54186.963217500015)
In [4]: jd2jepoch(*_)
Out[4]: 2007.23467

Comparison with SLALIB:


In [9]: slalib.sla_epj2d(2007.23467)
Out[9]: 54186.963217500015
In [10]: slalib.sla_epj(_)
Out[10]: 2007.23467

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