* Optimize `det`
Use Bareiss algorithm.
The performance is preserved but lessen the round-off errors.
* Optimize `det`
Use index mapping instead of swapping the rows directly.
Run the benchmark to compare the performance.
* Edit test file
Replace `approx.equal` with `assert.strictEqual`.
The test will fail with the previously implemented LU decomposition.
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
* fix(combinatorics): Improve precision of stirlingS2
Previously the computation of stirlingS2 used the closed form, which
suffers numerically by dividing a sum of very large terms by a large
factorial, causing roundoff errors for unnecessarily small inputs.
This commit switches to using the recurrence relation for the stirling
numbers of the second kind, and caching the partial results for future
calls. This has the advantage that all intermediate results are smaller
than the final value.
Also adds tests for much larger values of the stirlingS2 function and of
bellNumbers, whose computation depends on stirlingS2.
Resolves#2508.
* fix(stirlingS2): Correct lint errors.
Incorporating unit offsets into the internal "value" of the unit
causes more problems than it solves. This commit ends that practice
and instead only uses the offset when converting units or when
computing the absolute value of a unit.
Further, it makes it an error to compute the sign of a unit with an
offset, since that is inherently ambiguous: there is no way to tell
whether "-5 degC" is a temperature change, in which case it is definitely
negative, or if it is a specific temperature of something, in which case
it is "positive" in the sense of being above absolute zero.
(Unclear how valuable this latter concept is anyway, given that there are
no negative temperatures possible in that sense...)
Adds several tests for the various problems the former practice caused,
including all four basic arithmetic operations on units with offsets.
Co-authored-by: Jos de Jong <wjosdejong@gmail.com>
Also adds tests for math.log() of complex numbers in which the imaginary
part is much larger in absolute value than the real part.
Resolves#2503.
Co-authored-by: Jos de Jong <wjosdejong@gmail.com>
fix(approx): Make `approx.deepEqual` respect tolerance argument
Tests already contained calls of the form
`approx.deepEqual(A, B, epsilon)` but the comparison tolerance
argument epsilon was being silently ignored. This commit fixes
that oversight and corrects a couple of tests to reflect the finer-
grained testing.
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Changed `R` to `degR` as there is no unit `R`
`math.createUnit('mile', '1609.347218694', {override: true}})` has a syntax error (an extra `{` ) and is missing units, changed it to `math.createUnit(('mile', '1609.347218694 m', {override: true})` as I think was the original intention.
Co-authored-by: Jos de Jong <wjosdejong@gmail.com>
* fix(FunctionNode): Improve error message when a non-function is called
Also adds tests for as many different varieties of function calls
and their associate messages when the entity being called is not
a function as I could come up with.
Resolves#2493.
* feat(format): Add a truncate option to limit result length.
Also uses the new option in FunctionNode.js to limit the length of the value
portion of its new error messages. (As requested in review)
* docs: Add 'truncate' option to the list in the exported version of 'format'
Also adds the test case that revealed the problem and corrects the other test
case that could have found it except the tolerance had been cranked up very
high.
Resolves#2478.
This is a first step toward full publication of these functions,
that were already being exported by mathjs but had not yet
had the associated actions (documentation/available in
parser/typed, etc.) Also, makes most of them into TypeScript
type guards, and adds Matrix as a constructor type. Resolved#2431.
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
* Add overloads for Matrix add and subtract
* Add check for types/index.ts
* Fix type errors in types/index.ts
* Fix a couple execution errors
* Run test:types as part of test:all
* Fix remaining errors
* Replace types/index.ts comments with asserts
* Add tests for narrowed type inference
* Add dual-purpose comment at top of types/index.ts
* Update AUTHORS
* Use Glen's alternate test:types suggestion
* test: Add unit tests for all of the examples in (jsdoc) comments
Uses the existing extraction of examples from tools/docgenerator.js
Hence, for now this is limited to documentation of functions, but
hopefully it can be extended to classes, units (and physical constants),
and constants as well in the future.
Exposes numerous errors in the examples, some of which are bugs; these
are for now put on a known error list to be worked on, so that this
PR does not change a huge number of source files.
Also adds a test to check that all symbols are documented (which
similarly doesn't really pass at the moment, and is patched to a
hopefully temporary warning).
* refactor: Make doc.test.js into a node test
The source code is not available in its layout as in the repository in
the browser tests, so the new doc testing can only occur in the node tests
* Add simplifyCore, symbolicEqual, map, and resolve to the list with functions with known issues in the jsdoc examples
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Resolves#2427.
Also adds tests verifying that creating a fraction from two numbers
requires them both to be integers, and slightly updates documentation.
Co-authored-by: Jos de Jong <wjosdejong@gmail.com>
