[Matplotlib-users] Reverse y-axis?

2010-06-25 Thread Preben Randhol
Hi

I need to plot some data vs depth. In stead of giving depths as
0,-1000,-2000, I want to give the depths as 0,1000,2000 but when plotting
the data goes downwards (as if they had been negative). Can I get the
y-axis to reverse so it goes downwards and not upwards?




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Re: [Matplotlib-users] Reverse y-axis?

2010-06-25 Thread Michael Droettboom
On 06/25/2010 07:41 AM, Preben Randhol wrote:
 Hi

 I need to plot some data vs depth. In stead of giving depths as
 0,-1000,-2000, I want to give the depths as 0,1000,2000 but when plotting
 the data goes downwards (as if they had been negative). Can I get the
 y-axis to reverse so it goes downwards and not upwards?

If using the OO interface:

axes.invert_yaxis()

or

axes.set_ylim(2000, 0) # note the larger value first

or with the pylab interface:

ylim(2000, 0)

Mike

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Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA


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Re: [Matplotlib-users] Reverse y-axis?

2010-06-25 Thread Joe Kington
There's no single function to do it, but just reversing the current ylimits
manually is a one-liner.  (plt is matplotlib.pyplot, here)

plt.ylim(plt.ylim()[::-1])

Hope that helps,
-Joe


On Fri, Jun 25, 2010 at 6:41 AM, Preben Randhol rand...@pvv.org wrote:

 Hi

 I need to plot some data vs depth. In stead of giving depths as
 0,-1000,-2000, I want to give the depths as 0,1000,2000 but when plotting
 the data goes downwards (as if they had been negative). Can I get the
 y-axis to reverse so it goes downwards and not upwards?





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 ThinkGeek and WIRED's GeekDad team up for the Ultimate
 GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the
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 http://p.sf.net/sfu/thinkgeek-promo
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 Matplotlib-users@lists.sourceforge.net
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