DPlotAdmin Site Admin
Joined: 24 Jun 2003 Posts: 2310 Location: Vicksburg, Mississippi
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Posted: Tue Oct 11, 2005 8:33 pm Post subject: New function parser capability |
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There's a beta version of the function parser used by DPlot (in Y=f(X) and similar commands) available here [Edit: removed. This version of the function parser is now part of the standard distribution]. Before copying this beta version, use Explorer to look in the folder where DPlot is located (default=c:\Program Files\DPlot) and rename the file FParser.dll so that if everything falls apart you can delete the update and restore the last known good version.
This version of the function parser includes a normal distribution function, NORMDIST(x,mean,standard deviation), which is functionally equivalent to the Excel worksheet function without the "cumulative" parameter. For example,
NORMDIST(x,0,1)
will generate a normal distribution curve with mean=0, standard deviation=1.
The big change in the function parser is not so much the addition of NORMDIST but the ability to include functions with more than one argument. (Min and max, although obviously taking two arguments, are currently performed using tricks in DPlot: min(a,b) is translated to ((a<b)*a+(1-(a<b))*b)). The short version is if you can't break this new function then the door will be opened to all sorts of new capabilities.
If you can produce unexpected results or, worse, a crash, then please let me know the exact form of the equation you used as well as the X limits.
Thank you for your time. _________________ Visualize Your Data
support@dplot.com
Last edited by DPlotAdmin on Wed Mar 22, 2006 1:43 am; edited 2 times in total |
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