emacs/test/lisp/calc, branch feature/uniquify-as-function

Calc: fix binomial coefficients for negative arguments (bug#16999)

2020-09-14T09:19:22+00:00

For some values outside integers 0≤k≤n, (n choose k) gave wrong
results, entered infinite recursion or used unreasonably amounts of
stack space.  This change fixes that and extends the function to all
integer arguments using the definitions from M. J. Kronenburg
(https://arxiv.org/abs/1105.3689).

* lisp/calc/calc-comb.el (calcFunc-choose):
Fix sign error to prevent infinite recursion and extend function to
handle all integer arguments.
(math-choose-iter, math-choose-float-iter): Rewrite in iterative form;
no TCO in elisp yet.
* test/lisp/calc/calc-tests.el (calc-tests--fac, calc-tests--choose)
(calc-tests--check-choose, calc-tests--explain-choose)
(calc-tests--calc-to-number): New helper functions.
(calc-choose): New test.

Calc: regularise test names

2020-09-11T11:11:43+00:00

* test/lisp/calc/calc-tests.el (calc-remove-units, calc-extract-units)
(calc-convert-units, calc-bug-23889, calc-trig, calc-format-radix)
(calc-calendar, calc-solve-linear-system):
Use a uniform naming convention (calc- prefix) to simplify test running.

Calc: GCD(0,x)=GCD(x,0)=|x|, not x (bug#41279)

2020-05-15T18:15:36+00:00

Reported by David Ongaro.

* lisp/calc/calc-comb.el (calcFunc-gcd): Fix GCD simplification.
* test/lisp/calc/calc-tests.el (calc-gcd, calc-sum-gcd): New tests.

Calc: fix LU decomposition for non-numeric matrices (bug#41223)

2020-05-14T08:28:51+00:00

Computing determinant and inverse for on some matrices containing
non-numeric elements failed or gave the wrong result.
Reported by Mauro Aranda.

* lisp/calc/calc-mtx.el (math-do-matrix-lud): Don't use zero as pivot.
* test/lisp/calc/calc-tests.el (calc-matrix-determinant): New test.

; * test/lisp/calc/calc-tests.el: Fix mistake in last commit

2020-03-29T09:14:03+00:00

Calc: don't treat nil as an integer (bug#40155)

2020-03-27T17:11:18+00:00

Make Math-num-integerp return false for nil, following Math-integerp
which was changed in the bignum reform.  This fixes a crash in
calc-graph-fast.

Reported by Narendra Joshi.

* lisp/calc/calc-macs.el (Math-num-integerp): Not true for nil.
* test/lisp/calc/calc-tests.el (calc-Math-integerp): New tests.

Update copyright year to 2020

2020-01-01T00:59:52+00:00

Run "TZ=UTC0 admin/update-copyright $(git ls-files)".

; * test/lisp/calc/calc-tests.el: Fix warnings

2019-12-30T20:02:10+00:00

Calc: add missing dynamic variable declarations

2019-12-26T18:37:10+00:00

* lisp/calc/calc-alg.el (math-simplify-only, calc-simplify-mode)
(math-expand-formulas, calc-poly-div-remainder)
(math-living-dangerously, math-simplifying, calc-angle-mode)
(calc-prefer-frac, math-poly-base-variable):
Declare dynamic variables.
* test/lisp/calc/calc-tests.el (calc-poly-div):
Add test for at least one bug caused by missing declarations.

Spelling fixes

2019-12-10T02:45:18+00:00