matplotlib-users

[Matplotlib-users] getting the min and max values of an axis for plotting

[Johann Cohen-T. <co...@sl...>]

hello,
I have a function, which I am plotting. I want to add a line positioned 
at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
In order to get y0, and y1, my brute force trial and error browsing of 
the API lead me to :
y0=gca().yaxis.get_majorticklabels()[0].get_position()[1]
y1=gca().yaxis.get_majorticklabels()[-1].get_position()[1]

.... and as I am never contented, I now ask : is it really the manner of 
choice to get this information. I sense that I did not take the 
straightest path to get it :)

thanks in advance,
Johann

Re: [Matplotlib-users] getting the min and max values of an axis for plotting

[Christopher B. <c-...@as...>]

Hi Johann,

try:
a,b = ylim()

> I have a function, which I am plotting. I want to add a line positioned 
> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
> In order to get y0, and y1, my brute force trial and error browsing of 
> the API lead me to :
> y0=gca().yaxis.get_majorticklabels()[0].get_position()[1]
> y1=gca().yaxis.get_majorticklabels()[-1].get_position()[1]
> 
> .... and as I am never contented, I now ask : is it really the manner of 
> choice to get this information. I sense that I did not take the 
> straightest path to get it :)

Re: [Matplotlib-users] getting the min and max values of an axis for plotting

[Jouni K. S. <jk...@ik...>]

Johann Cohen-Tanugi
<co...@sl...> writes:

> I have a function, which I am plotting. I want to add a line positioned 
> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).

Try axvline(x).

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Re: [Matplotlib-users] getting the min and max values of an axis for plotting

[Johann Cohen-T. <co...@sl...>]

learn and survive... :)

thanks Jouni and Christopher!
Johann

Jouni K. Seppänen wrote:
> Johann Cohen-Tanugi
> <co...@sl...> writes:
>
>   
>> I have a function, which I am plotting. I want to add a line positioned 
>> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
>>     
>
> Try axvline(x).
>
>   

Re: [Matplotlib-users] getting the min and max values of an axis for plotting

[Fabrice S. <si...@lm...>]

Le lundi 12 mai 2008 à 11:08 +0200, Johann Cohen-Tanugi a écrit :
> hello,
> I have a function, which I am plotting. I want to add a line positioned 
> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
> In order to get y0, and y1, my brute force trial and error browsing of 
> the API lead me to :
> y0=gca().yaxis.get_majorticklabels()[0].get_position()[1]
> y1=gca().yaxis.get_majorticklabels()[-1].get_position()[1]

line = gca().get_lines()[0]
y0 = line.get_ydata().min()
y1 = line.get_ydata().max()

should work (sorry I did not checked)

-- 
Fabricio