|Subject:||Windows PSPPIRE/PSPP is pretty wonky|
|Date:||Tue, 30 Dec 2014 16:58:48 -0600|
|User-agent:||Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0|
John and Harry,|
PSPPIRE.exe 0.8.4-g5ce6b1 (and the associated PSPP) is pretty wonky. Paste doesn't work correctly (I believe that's a know issue?). To paste syntax into the syntax window, I had to right-click and choose paste; neither Control-v or Edit > Paste would paste the text.
And Run > Current line wasn't working (but now I cannot replicate it, I'm guessing it has to do with where the cursor was rather than which line of the syntax window was "shaded"). What was most annoying is that by "not working" I mean that the output window would flash but there was no additional output in the window and no warning or error.
And then look at the boxplot I got when I ran Robin's syntax on the physio data (attached "boxplot.png")... I don't use examine and I don't know what " /STATISTICS = EXTREME (3)" is meant to do, but I know what a boxplot is and there shouldn't be values like 9999999 between 1200 and 200 on the y-axis.
Regarding the actual algorithm, the boxplot I get from SPSS is attached as "boxplot2.png". I think it's a lot more reasonable (albeit uglier). The main difference is the SPSS boxplot had short whiskers while PSPP's boxplot whiskers seems to include the entire range of the data (including the outlier). In the physio dataset, apparently there are some outliers like 30 mm for a human height. That's the kind of thing that boxplots are supposed to help you find. Maybe that's a bug in PSPP that the whisker length is just wrong? Otherwise I think it would make more sense to limit the whiskers to some reasonable value like 1.5 times the inter-quartile range (or to the highest and lowest values that are within 1.5 times the inter-quartile range).
On 12/30/2014 4:13 PM, Alan Mead wrote:
-- Alan D. Mead, Ph.D. President, Talent Algorithms Inc. science + technology = better workers +815.588.3846 (Office) +267.334.4143 (Mobile) http://www.alanmead.org Announcing the Journal of Computerized Adaptive Testing (JCAT), a peer-reviewed electronic journal designed to advance the science and practice of computerized adaptive testing: http://www.iacat.org/jcat
Description: PNG image
Description: PNG image
|[Prev in Thread]||Current Thread||[Next in Thread]|