Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!udel!mmdf From: Dennis Robert Gorrie Newsgroups: comp.sys.amiga.applications Subject: Regression Analysis Message-ID: <57096@nigel.ee.udel.edu> Date: 25 Jun 91 00:12:17 GMT Sender: mmdf@ee.udel.edu Lines: 39 paul@ersys.edmonton.ab.ca (Paul Wolodko) writes: > > I'm looking for a package/software a friend can use on the > Amiga which allows her to do phys. lab plots. She's trying to cut > down the time she's spending on those graphs ... she isn't > looking for any high level stat. functions, just figures the best > fit curve ... max/min/best fit linear lines too I suppose; but > nothing viciously technical. I don't see anything really tough, > except the actual stats. stuff, but there is probably something > out there already (he says hopefully); but I don't really have > the time to figure it out (life is complex). Anyway, any suggestions > or know of any packages? (Thanks) > > Paul Wolodko paul@ersys.edmonton.ab.ca > Edmonton Remote Systems: Serving Northern Alberta since 1982 I was looking for a similar program. I tried Math-Amation, but I was not impressed. So I use a spread sheet program, Analyse. You could use any spreadsheet program. You just have to type in your data, and know the formulas for the Least Squares approximation, (Best Fit Line) and Pearson's product moment r. Look them up in any stats book. If you use a spreadsheet, then you can apply the formula to your all your data, get the best fit points, and then plot them. Plus, a good spreadsheet program will be able to import/export data in LOTUS format for using your same data on an pc-clone. P.S. Physics data is not always linear, so you have to apply Log or Ln to your data to make it linear. When you finally calculate the best fit equation of the Log(y) vs x graph, or Ln (y) vs x, you then have to integrate it to get the equation of your original non-linear graph. +-----------------------------------------------------------------------+ |Dennis Gorrie 'Chain-Saw Tag... | |gorriede@max.cc.uregina.ca Try It, You'll Like It!'| |gorrie@meena.cc.uregina.ca | +-----------------------------------------------------------------------+