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+--- Thread: TRN() in Home? (/thread-15026.html)
TRN() in Home? - Helge Gabert - 05-19-2020 02:57 PM
TRN() doesn't return the correct answer in Home, e.g.
[[2 1+i][1-i 3]] returns [[2 1-i][1+i 3]], which is indistinguishable from transpose().
CAS returns the transpose with complex conjugates, [[2 1+i][1-i 3]].
Maybe this was fixed in the Jan 2020 firmware; I just realized I'm still running Oct 2018.
RE: TRN() in Home? - victorvbc - 05-19-2020 04:37 PM
(05-19-2020 02:57 PM)Helge Gabert Wrote: TRN() doesn't return the correct answer in Home, e.g.
[[2 1+i][1-i 3]] returns [[2 1-i][1+i 3]], which is indistinguishable from transpose().
CAS returns the transpose with complex conjugates, [[2 1+i][1-i 3]].
Maybe this was fixed in the Jan 2020 firmware; I just realized I'm still running Oct 2018.
I can confirm that it doesn't return the conjugate transpose in home, even in the latest firmware, with complex turned on in both home and cas. I don't know if it's supposed to be that way.
If you use CAS.TRN() in home it works though.
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RE: TRN() in Home? - Helge Gabert - 05-19-2020 05:02 PM
Thanks for the info!
Yes, CAS.TRN() also works with the Oct 2018 firmware in Home. Need to remind myself to use that in a Home program . . .
RE: TRN() in Home? - ijabbott - 05-19-2020 05:22 PM
I think it may be a bug inherited from the HP 39gII where TRN behaves incorrectly as in the HP Prime's Home mode. On the older HP 39gs, TRN does a complex conjugate transpose as described in the manual.