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- From: murphy@bohr.physics.purdue.edu (William J. Murphy)
- Newsgroups: comp.sys.next.misc
- Subject: Re: MATLAB (the missing piece)
- Message-ID: <8660@dirac.physics.purdue.edu>
- Date: 6 Nov 92 14:23:37 GMT
- References: <1992Nov5.002052.6739@kakwa.ucs.ualberta.ca> <8jj1H3ihoa@atlantis.psu.edu>
- Sender: news@dirac.physics.purdue.edu
- Organization: Purdue University Physics Department
- Lines: 32
-
- In article <8jj1H3ihoa@atlantis.psu.edu> mek@guinan.psu.edu (Mark E. Kotanchek) writes:
- >
- >NeXT has lost a hell of a lot more than 200 sales because they have
- >inadequate numerical tools. I got my NeXTstation a year-and-a-half ago and
-
- There is always DaDisp. (1/2 smilie) I have played with the demo version for
- the NeXT. Unfortunately, it is little more than a port of their PC version
- with a NeXTStep (almost) front end slapped on. The graphics look pretty awful
- IMO, (just like the PC version). The fonts aren't PostScript. They even
- made a menu with function keys labeled (F1, F2, ...)!
-
- I will say that DaDisp on the PC is usable. It provides a somewhat intuitive
- environment for manipulating signals. A comparison of MATLAB and DaDisp that
- I did a few years ago showed that DaDisp was sorely lacking in crunch power.
- I believe that this stems from their implementation of virtual memory. DaDisp
- was built on a DOS extender originally. The size of the buffer where virtual
- memory swapping takes place is about 4K or 8K data points. That's a real
- pain when you want to work with Mega point data sets. Secondly, if you have
- tried importing data into DaDisp (specifically binary data), the process is
- convoluted and not scriptable (at least for the 2.0 version it wasn't). I
- found that when trying to isolate a segment of data more than 999999 points
- into the data set, I couldn't get it imported. (I was treating the previous
- million points or so as a header. The length of a header was limited to
- 999999bytes.)
-
- Well, in my best Linda Ellerbee impression,
- And so it goes,
-
- --
- Bill Murphy | The Call of the Norwegian Whipperwil:
- | "I tink so, I tink so, probably."
- murphy@physics.purdue.edu | "I dunno, I dunno, who can tell."
-