Please attach the code you used to generate this image.
Ben Root
On Fri, Jul 16, 2010 at 7:11 AM, Waléria Antunes David <
waleriantu...@gmail.com> wrote:
> I forgot of the my image.
>
>
> On Fri, Jul 16, 2010 at 9:10 AM, Waléria Antunes David <
> waleriantu...@gmail.com> wrote:
>
>> Hi...
>>
>> I tried the first option, but failed.... see my image attached
>>
>> And the second option, i don't understand the variable 'val'
>>
>> ...?
>>
>>
>> On Thu, Jul 15, 2010 at 3:22 PM, Ryan May <rma...@gmail.com> wrote:
>>
>>> On Thu, Jul 15, 2010 at 8:41 AM, Waléria Antunes David
>>> <waleriantu...@gmail.com> wrote:
>>> > Hi all,
>>> >
>>> > I have a code base so that:
>>> >
>>> >
>>> > from pylab import *
>>> > x = arange (3000,3400)
>>> > y = -108 * (3.0e14 ** 2)/x**2
>>> >
>>> > pylab..title("Teste")
>>> > pylab.savefig("imagem.png")
>>> > plot(x, y)
>>> >
>>> >
>>> > Well.... the values of the function range(3000,3400) are in Hz......i
>>> need
>>> > to pass GHz which would be in scientific notation as follows bellow:
>>> >
>>> > 3000 Hz = 3,0 × 10-6 GHz
>>> > 3400 Hz = 3,4 x 10-6 Ghz
>>> >
>>> > How do I make the graph x-axis is shown in figures
>>> > scientific notation, for this currently so
>>> >
>>> > 3000,3050,3100,....,3400
>>> >
>>> > in scientific notation is: (3.0e-6, 3.4e-6)
>>>
>>> One way is to just change the values in the GHz and plot them:
>>>
>>> plot(x/1e9, y)
>>> # Need to change some limits so that they show up in scientific notation:
>>> gca().xaxis.get_major_formatter().set_powerlimits((-5,5))
>>>
>>> The other way is make a custom formatter that changes the values of the
>>> ticks:
>>>
>>> def fmt_ghz(val, pos=None):
>>> return '%g' % (val / 1e9)
>>>
>>> plot(x, y)
>>> gca().xaxis.set_major_formatter(FuncFormatter(fmt_ghz))
>>>
>>> You can get more information here:
>>> http://matplotlib.sourceforge.net/api/ticker_api.html
>>>
>>> Ryan
>>>
>>> --
>>> Ryan May
>>> Graduate Research Assistant
>>> School of Meteorology
>>> University of Oklahoma
>>>
>>
>>
>
>
> ------------------------------------------------------------------------------
> This SF.net email is sponsored by Sprint
> What will you do first with EVO, the first 4G phone?
> Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
> _______________________________________________
> Matplotlib-users mailing list
> Matplotlib-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
------------------------------------------------------------------------------
This SF.net email is sponsored by Sprint
What will you do first with EVO, the first 4G phone?
Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
