matplotlib-users

[Matplotlib-users] How to set the unit (scale factor, x1e5) on x axis?

[fernandof <fer...@gm...>]

Googled, looked for documentation, even tried the source code but couldn't
find it.
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Re: [Matplotlib-users] How to set the unit (scale factor, x1e5) on x axis?

[Eric F. <ef...@ha...>]

fernandof wrote:
> Googled, looked for documentation, even tried the source code but couldn't
> find it.

You may need to be more precise in describing what you want to do; it is 
far from clear to me from your subject line.

Eric

Re: [Matplotlib-users] How to set the unit (scale factor, x1e5) on x axis?

[Fernando F. <fer...@gm...>]

Hi Eric,

Reading it one day after I can tell it's really unclear, sorry about
that....

So, I want to plot a line, but controlling the labels on the tickers of the
x axis. For instance, if I'm plotting (1000, 5),  (2000, 10), (3000, 10),
the ticks on the x axis might show 1000     2000     3000    or     1      2
     3    x1e3. I want to control it, set it to 1 and obtain the first
example, and set to 1000 and obtain the second one.

Thanks,
Fernando.


On Sun, Sep 14, 2008 at 8:53 PM, Eric Firing <ef...@ha...> wrote:

> fernandof wrote:
>
>> Googled, looked for documentation, even tried the source code but couldn't
>> find it.
>>
>
> You may need to be more precise in describing what you want to do; it is
> far from clear to me from your subject line.
>
> Eric
>

Re: [Matplotlib-users] How to set the unit (scale factor, x1e5) on x axis?

[Stephen G. <ste...@op...>]

Hi Fernando,
> So, I want to plot a line, but controlling the labels on the tickers 
> of the x axis. For instance, if I'm plotting (1000, 5),  (2000, 10), 
> (3000, 10), the ticks on the x axis might show 1000     2000     3000 
>    or     1      2      3    x1e3. I want to control it, set it to 1 
> and obtain the first example, and set to 1000 and obtain the second one.
I not 100% clear what you want to achieve, however look into your 
matplotlib distribution for ticker.py

There is Formatter classes that control such things.

For example the existing ScalarFormatter, has a method set_scientific() 
to enable /disable scientific formatting. My reading of your description 
suggests this is what you are after or you might get some joy out of 
set_powerlimits()  or the argument useOffset.

If your requirements are different you may need to create your own 
formatter class.

Steve

Re: [Matplotlib-users] How to set the unit (scale factor, x1e5) on x axis?

[Eric F. <ef...@ha...>]

Stephen George wrote:
> Hi Fernando,
>> So, I want to plot a line, but controlling the labels on the tickers 
>> of the x axis. For instance, if I'm plotting (1000, 5),  (2000, 10), 
>> (3000, 10), the ticks on the x axis might show 1000     2000     3000 
>>    or     1      2      3    x1e3. I want to control it, set it to 1 
>> and obtain the first example, and set to 1000 and obtain the second one.
> I not 100% clear what you want to achieve, however look into your 
> matplotlib distribution for ticker.py
> 
> There is Formatter classes that control such things.
> 
> For example the existing ScalarFormatter, has a method set_scientific() 
> to enable /disable scientific formatting. My reading of your description 
> suggests this is what you are after or you might get some joy out of 
> set_powerlimits()  or the argument useOffset.
> 
> If your requirements are different you may need to create your own 
> formatter class.

The only thing I can add at this point is that there is also an 
Axes.ticklabel_format() method that calls set_scientific, and doesn't 
require you to dig around to figure out how to access the formatter.

Eric

> 
> Steve
> 
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