But... as I've just discovered, the equivalent function expressed as
^@-@-:@*:
does yield a "smooth" curve for the 2nd differential, so presumably
there's a
different need to do or level of approximation with ^&2 compared to *:
There is a remark
Generating higher-order partial derivatives with D. 2 fails. Use
repeated application of D. 1 instead
in the documentation at
https://code.jsoftware.com/wiki/Vocabulary/dcapdot
Mike
On 24/11/2022 18:36, Raul Miller wrote:
Presumably you're working with an older version of J, like J807. (J9
tossed the D. conjunction and requires we use the math/calculus
library manually.)
Anyways, if you increase the size of the plot, you'll see that the
display artifact you're looking at is a consequence of discretization
-- the plot is composed of lines and at that particular point in the
graph these lines do not adequately conform to the underlying curve.
FYI,
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