Maybe an interrupt would appropriate...
Roger Hui wrote: > NO DATA, like NaN, should be treated with caution. > For example, what are the answers to the following > questions? > > NODATA = NODATA > NODATA = 314159 > NODATA ~: NODATA > NODATA > NODATA > $ NODATA > 3 $ NODATA > NODATA $ 3 > 3+NODATA > 0 1 2,NODATA > /: 0 1 2,NODATA > < NODATA > >> NODATA >> > NODATA e. a. > > Last but not least, > > NODATA=NaN > > > > ----- Original Message ----- > From: James C Field <[email protected]> > Date: Saturday, September 5, 2009 11:13 > Subject: Re: [Jchat] wishlist adverb: ignore indices > To: Chat forum <[email protected]> > > >> Raul Miller wrote: >> >>> On Thu, Sep 3, 2009 at 4:22 PM, James C >>> >> Field<[email protected]> wrote: >> >>> >>> >>>> What do you want the "fill" marker to be? >>>> Blank fill for character or zero fill for integer? Real or >>>> >> imaginary?>> Perhaps a simple extension such as used in APL TAKE. >> >>>> >>>> >>> I do not understand how your question relates to what I >>> want: What is a "marker"? >>> >>> But, yes, fill would be 0 for numbers, space for characters >>> and ace for boxes. >>> >>> >>> >> A MARKER in my conception is an indication in or of a data field >> that no >> data is present or offered. Data is simply absent. Programmers >> frequently employ subterfuges or special flags or tags to >> indicate that >> there is no data in a field. Theis practice could be >> characterised as a >> kludge. >> >> NO DATA should be a universally understood condition in data >> storage and >> retrieval. APL take used zero and blank as fill. >> >> I propose that NO DATA should be a useful alternative fill. >> Obviously >> this is complicated in its implications but, I think, worth thought. >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
