[Maxima-bugs] [maxima:bugs] Re: #4641 is does not work

[Stavros M. <mac...@us...>]

Perhaps you should look at the value of flatten(t)[2]:
~~~
t:matrix([1],[2])$
flatten(t)[2] => [2]
~~~
In some systems (e.g. R), a singleton value is the same as a vector of length 1. That is not true in Maxima or most other systems, as you can verify:
~~~
is([2]=2) => false
~~~

"Of coourse it should work like it is supposed to without either any of these extra things."
Comments like this are inappropriate in a bug report, for multiple reasons:
* It is obnoxiously phrased. "Of course" is presumptuous.
* It presumes that your (mis)understanding of the system is what the system is "supposed" to do.
* It suggests that using the correct functions is "extra things".

Please try to use more neutral language and recognize that we are here to help you. Attacking us as incompetent is not helpful.


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**[bugs:#4641] is does not work**

**Status:** not-a-bug
**Group:** None
**Created:** Mon Dec 01, 2025 04:03 PM UTC by dan hayes
**Last Updated:** Wed Dec 03, 2025 02:51 PM UTC
**Owner:** nobody


build_info()  or bug_report()
"branch_5_44_base_231_g5c411f69f",timestamp="2021-01-12 23:51:42",host="x86_64-w64-mingw32",lisp_name="SBCL",lisp_version="2.0.0",maxima_userdir="C:/Users/zmth1/maxima",maxima_tempdir="C:/Users/zmth1/AppData/Local/Temp",maxima_objdir="C:/Users/zmth1/maxima/binary/branch_5_44_base_231_g5c411f69f/sbcl/2_0_0",maxima_frontend="wxMaxima",maxima_frontend_version="20.12.2-DevelopmentSnapshot_MSW_OpenMP201511+Locks")

(t:matrix([1],[2]),t,t[2],is( t[2]>0));   

and it comes back with unknown



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