Daniel R Hicks
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 Feb 4 comment Sum of averages vs average of sums This is C code, not a spreadsheet, and the numbers are "float" values, so no blanks. Pretty sure it's not a simple bug (though it may well be some sort of conceptual problem). The "sum" of the values in a row is actually accumulated separately from/concurrently with the individual values (though a check shows they add up to equal the sum), so taking the average of the row or some such is not the problem. Feb 3 comment Sum of averages vs average of sums (That is, the vertical time dimension is calculated with a moving average. FWIW, the column values tend to differ by a factor of 50 or so, with one column predominating.) Feb 3 comment Sum of averages vs average of sums Actually, it's an exponential moving average with N of 50. Feb 3 asked Sum of averages vs average of sums Oct 15 accepted How to scale data for a log graph Oct 13 answered How to scale data for a log graph Oct 13 revised How to scale data for a log graph added 132 characters in body Oct 13 comment How to scale data for a log graph That's going the wrong way. Oct 13 revised How to scale data for a log graph added 28 characters in body Oct 13 revised How to scale data for a log graph added 378 characters in body Oct 13 revised How to scale data for a log graph added 378 characters in body Oct 13 revised How to scale data for a log graph added 65 characters in body Oct 13 asked How to scale data for a log graph Oct 1 comment what does $-2^2$ evaluate to? Actually, the C-based languages do not have an exponentiation operator, but use functions instead, so there would be no ambiguity. Fortran uses ** but it places that ahead of negation in precedence, and I would imagine that other languages styled after Fortran use the same precedence. Sep 25 comment Really simple question about sine wave equation with $\pi$ Yep, assuming t is seconds, this is an equation for a sinusoidal waveform of 150Hz. Sep 15 revised Does using an ellipse as a template still produce an ellipse? added 2 characters in body Sep 15 comment Does using an ellipse as a template still produce an ellipse? @J.M -- I can't believe that I screwed up the title that badly!! I generally check spelling/wording over pretty closely, but after fixing the second "elipse" => "ellipse" I didn't look for the first, and the extra "d" must have fallen from the sky. Sep 15 accepted Does using an ellipse as a template still produce an ellipse? Sep 15 comment Does using an ellipse as a template still produce an ellipse? OK, thanks. I suspected as much, but my math is weak enough that I wasn't sure. And your diagram very nicely illustrates how it breaks down. Sep 15 comment Does using an ellipse as a template still produce an ellipse? @J.M. -- Yep, essentially that kind of router. A collar would be fastened either to the base or to the shaft of the bit to hold the bit a fixed distance from the template edge.