On Tue, Aug 5, 2008 at 7:03 PM, Eric Firing <[EMAIL PROTECTED]> wrote:
> Matlab ignores it, same as with a nan. Although intuitively I think of inf as very different from nan, my default is to go with matlab like behavior in the absence of compelling a argument otherwise. I won't be providing that argument for isnan/inf, so if someone wants mpl to behave differently, step up and argue why. > This needs a bit of thought and checking. Mike went to some trouble, I > believe, to make nans work without running everything through masked > arrays--whether this is actually *faster* than doing an initial masking > operation when needed and then using masked arrays everywhere internally > when bad values are present, I don't know. It is possible that everything > could be made to work with infs simply by changing all "isnan(x)" to > "~isfinite(x)", which has the advantage of being slightly faster > (surprisingly) as well as more general. Perhaps we should centralize this functionality to a cbook analogue of "is_string_like" or "iterable" called "is_plottable" or something to that effect. That way, people writing plotting functions will not have to decide if the inclusion criteria is isnan or ~isinfinite, but instead can simply rely on the cbook function (with a moderate performance hit for the extra function call). We will likely need a version for a single axis (x or y) as well as for points ( (x,y) tuples) -- these ideally will support scalar or array inputs, or we can provide array versions of each. There are only a few modules using isnan currently (axes, contour, mlab and path) so it would not be too difficult to centralize this functionality. Do you want to take the lead on this one, Eric? JDH ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
