matplotlib-users Mailing List for matplotlib

Thanks Zach,
That simple little example makes more sense than the manual page did. 
Perhaps it's just late.
I appreciate it.
Steven
On Mon Apr 8 22:30:43 2013, Zachary Pincus wrote:
>> I've got some verts I stole from the internet that draws an upward arrow
>> (or a down arrow), but I need to draw an arrow to the right or to the
>> left. But I don't really understand verts and how they work.
>>
>> arrowup_verts = [[0.,0.], [-1., -1], [0.,0.], [0.,-2.],[0.,0.], [1,-1]]
>> arrowdown_verts = [[0.,0.], [-1., 1], [0.,0.], [0.,2.],[0.,0.], [1, 1]]
>>
>> plot them like...
>>
>> scatter(1,1,s=100, marker=None, verts=arrowup_verts)
>>
>>
>> Can someone make me new verts for the right and left arrow? Then, maybe
>> tomorrow, explain how I was supposed to know what to do.
>
> Draw a line from (0,0) to (-1, -1) on the X-Y plane, and then to (0,0) again, and then continue so forth for all the (x,y) pairs in arrowup_verts. You will notice they form a nice little arrow pointing up. (At some point in this process, you should note that "verts" is short for "vertices". As in vertices of a polygon or poly-line.)
>
> It would seem that the origin of the "verts" coordinate system is translated to the (x,y) data position at which each marker is plotted.
>
> This should give you, I presume, sufficient information to figure out your own left and right arrows, no? Or any other shape you should care to plot...
>
> Zach
>
>
>> Thanks y'all
>>
>> Steven
>>
>> --
>>
>> Steven Boada
>>
>> Doctoral Student
>> Dept of Physics and Astronomy
>> Texas A&M University
>> bo...@ph...
>>
>>
>> ------------------------------------------------------------------------------
>> Precog is a next-generation analytics platform capable of advanced
>> analytics on semi-structured data. The platform includes APIs for building
>> apps and a phenomenal toolset for data science. Developers can use
>> our toolset for easy data analysis & visualization. Get a free account!
>> http://www2.precog.com/precogplatform/slashdotnewsletter
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
--
Steven Boada
Doctoral Student
Dept of Physics and Astronomy
Texas A&M University
bo...@ph...

Hey List,
I've got some verts I stole from the internet that draws an upward arrow 
(or a down arrow), but I need to draw an arrow to the right or to the 
left. But I don't really understand verts and how they work.
arrowup_verts = [[0.,0.], [-1., -1], [0.,0.], [0.,-2.],[0.,0.], [1,-1]]
arrowdown_verts = [[0.,0.], [-1., 1], [0.,0.], [0.,2.],[0.,0.], [1, 1]]
plot them like...
scatter(1,1,s=100, marker=None, verts=arrowup_verts)
Can someone make me new verts for the right and left arrow? Then, maybe 
tomorrow, explain how I was supposed to know what to do.
Thanks y'all
Steven
-- 
Steven Boada
Doctoral Student
Dept of Physics and Astronomy
Texas A&M University
bo...@ph...