Re: [Matplotlib-users] Newbie question.

[Peter G. <pgr...@ge...>]

John Hunter wrote:

>>>>>>"Andrea" == Andrea Riciputi <ari...@pi...> writes:
>>>>>>            
>>>>>>
>
>    Andrea> Hi all, I'm an absolutely matplotlib newbie, so I'm sorry
>    Andrea> if my question is trivial. Anyway I've read the user guide
>    Andrea> and looked at the examples without finding out a solution.
>
>    Andrea> Here it is my problem. Suppose I have a 2-dimensional
>    Andrea> array containg my data, and I want to produce a surface or
>    Andrea> a contour plot with it. Now the imshow() function seems
>    Andrea> the right way to go through. So far so good. Now suppose I
>    Andrea> want to draw the x,y axes for this plot, and suppose my
>    Andrea> axes are represented by **not-uniform** 1-dimensional
>    Andrea> array x[i], y[j]. How can I get the right ticks on the
>    Andrea> plot axes??
>
>You need to interpolate your data onto a rectilinear grid and then use
>pcolor.  imshow requires that your data be an image -- eg the dx and
>dy between rows and columns is the same between every row and column.
>pcolor only assumes a rectilinear grid, so the dx and dy can vary from
>row to row and column to column.  But you have unstructured data.
>
>In matlab, the interpolation is handled by the griddata function.
>Peter Groszkowski promised to post some code he uses to for this
>purpose back in December, but apparently he got lost in the stars.
>

yup.. i did get a little "lost in the stars" - I forgot about it in 
fact.  I promise I will post it in the next few days - this time I mean 
it. ;)

-- 
Peter Groszkowski         Gemini Observatory
Tel: +1 808 9742509       670 N. A'ohoku Place
Fax: +1 808 9359235       Hilo, Hawai'i 96720, USA