Thread: [Matplotlib-users] invisible plot

I'm a newbie to matplotlib.  When I try to generate a simple plot, nothing
happens.  Any advice will be appreciated.  Here's my code:

from numpy import *
from matplotlib import *

x= arange(0,10.,0.1)
y= x**1.5 - 0.25*x**2

pyplot.figure(figsize=(9, 6), dpi=120)
pyplot.plot(x, y)
-- 
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On 2009-07-15 16:58, Dr. Phillip M. Feldman wrote:
> I'm a newbie to matplotlib.  When I try to generate a simple plot, nothing
> happens.  Any advice will be appreciated.  Here's my code:
>
> from numpy import *
> from matplotlib import *
>
> x= arange(0,10.,0.1)
> y= x**1.5 - 0.25*x**2
>
> pyplot.figure(figsize=(9, 6), dpi=120)
> pyplot.plot(x, y)

pyplot.show()

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco

On Wed, Jul 15, 2009 at 4:58 PM, Dr. Phillip M. Feldman <
pfe...@ve...> wrote:

>
> I'm a newbie to matplotlib.  When I try to generate a simple plot, nothing
> happens.  Any advice will be appreciated.  Here's my code:
>
> from numpy import *
> from matplotlib import *
>
> x= arange(0,10.,0.1)
> y= x**1.5 - 0.25*x**2
>
> pyplot.figure(figsize=(9, 6), dpi=120)
> pyplot.plot(x, y)


Add this to the end of the script (after all the plotting):

    pyplot.show()


Ryan

-- 
Ryan May
Graduate Research Assistant
School of Meteorology
University of Oklahoma

Dr. Phillip M. Feldman wrote:
> I'm a newbie to matplotlib.  When I try to generate a simple plot, nothing
> happens.  Any advice will be appreciated.  Here's my code:
> 
> from numpy import *
> from matplotlib import *
> 
> x= arange(0,10.,0.1)
> y= x**1.5 - 0.25*x**2
> 
> pyplot.figure(figsize=(9, 6), dpi=120)
> pyplot.plot(x, y)

pyplot.show()

Or run inside "ipython -pylab".

Eric

On 7/15/2009 5:58 PM Dr. Phillip M. Feldman apparently wrote:
> I'm a newbie to matplotlib.  When I try to generate a simple plot, nothing 
> happens.  Any advice will be appreciated.  Here's my code:

> from numpy import * 
> from matplotlib import * 

> x= arange(0,10.,0.1)
> y= x**1.5 - 0.25*x**2 

> pyplot.figure(figsize=(9, 6), dpi=120)
> pyplot.plot(x, y)


Hmm, I don't think you copied that quite right.
Anyway::

    import numpy as np
    from matplotlib import pyplot as plt

    x= np.arange(0,10.,0.1)
    y= x**1.5 - 0.25*x**2

    fig = plt.figure(figsize=(9, 6), dpi=120)
    myplot = plt.plot(x, y)

    plt.show()

Alan Isaac

Hi Phillip,

Don't you need to call

pyplot.show()

at the end of the script?

Regards,
--Damon

On 15 Jul 2009, at 22:58, Dr. Phillip M. Feldman wrote:

>
> I'm a newbie to matplotlib.  When I try to generate a simple plot,  
> nothing
> happens.  Any advice will be appreciated.  Here's my code:
>
> from numpy import *
> from matplotlib import *
>
> x= arange(0,10.,0.1)
> y= x**1.5 - 0.25*x**2
>
> pyplot.figure(figsize=(9, 6), dpi=120)
> pyplot.plot(x, y)
> -- 
> View this message in context: http://www.nabble.com/invisible-plot-tp24506682p24506682.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
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