Mathics Versions Save

New features:

• LinearModelFit #592
• EasterSunday #590
• DSolve for PDE #589
• LogisticSigmoid #588
• CentralMoment, Skewness, Kurtosis #583
• New web interface #574
• Image support and image processing functions #571, #541, #497, #493, #482
• StringCases, Shortest, Longest string match/replace #570
• Quantime and Quartiles #567
• Pick #563
• ByteCount #560
• Nearest #559
• Count #558
• RegularPolygon #556
• impoved date parsing #555
• Permutations #552
• LLVM compilation of simple expressions #548
• NumberForm #534, #530, #455
• basic scripting with matihcsscript
• Arcs for Disk and Circle #498, #526
• download from URL #525
• $CommandLine #524
• Background option for Graphics #522
• Style #521, #471, #468
• abbreviated string patterns #518
• Return #515
• better messages #514
• Undo and redo functionality in web interface #511
• Covariance and Correlation #506
• ToLowerCase, ToUpperCase, LowerCaseQ, UpperCaseQ #505
• StringRepeat #504
• TextRecognise #500
• axis numbers to integers when possible #495
• PointSize #494
• FilledCurve, BezierCurve, BezierFunction #485
• PadLeft, PadRight #484
• Manipulate #483, #379, #366
• Replace #478
• String operator versions #476
• improvements to Piecewise #475
• Derivation typo #474
• Natural language processing functions #472
• Arrow, Arrowheads #470
• optional modules with requires attribute #465
• MachinePrecision #463
• Catenate #454
• Quotient #456
• disable spellcheck on query fields #453
• MapThread #452
• Scan and Return #451
• On and Off #450
• $MachineEpsilon and $MachinePrecision #449
• ExpandAll #447
• Position #445
• StringPosition #444
• AppendTo, DeleteCases, TrueQ, ValueQ #443
• Indeterminate #439
• more integral functions #437
• ExpIntegralEi and ExpIntegralE #435
• Variance and StandardDeviation #424
• Legacy Random function #422
• Improved gamma functions #419
• new recursive descent parser #416
• TakeSmallest and related #412
• Boole #411
• Median, RankedMin, RankedMax #410
• HammingDistance #409
• JaccardDissimilarity and others #407
• EuclideanDistance and related #405
• Magic methods for Expression #404
• Reverse #403
• RotateLeft and RotateRight #402
• ColorDistance, ColorConvert #400
• Predefine and document $Aborted and $Failed #399
• IntegerString, FromDigits, and more #397
• EditDistance and DamerauLevenshteinDistance #394
• QRDecomposition #393
• RandomChoice and RandomSample #488
• Hash #387
• Graphics boxes for colors #386
• Except #353
• Document many things #341
• StringExpression #339
• Legacy file functions #338
• upgrade to Sympy 1.0 #334

Bug fixes:

• Nested Modules #591, #584
• Python2 Import bug #565
• XML import #554
• \[Minus] parsing bug #550
• Cases evaluation bug #531
• Take edge cases #519
• PlotSize bug #512
• Firefox nodeValue warning #496
• Django database permissions #489
• FromDigits missing message #479
• numerfication upon result only #477
• saving and loading notebooks #473
• Rationalise #460
• Optional and Pattern precedence values #459
• fix Sum[i / Log[i], {i, 1, Infinity}] #442
• added \[Pi], \[Degree], \[Infinity] and \[I] to parser #441
• fix loss of precision bugs #440
• many minor bugs from fuzzing #436
• Positive/Negative do not numerify arguments #430 fixes #380
• chains of approximate identites #429
• Logical expressions behave inconsistently/incorrectly #420 fixes #260
• fix Take[_Symbol, ___] #396
• avoid slots in rule handling #375 fixes #373
• Gather, GatherBy, Tally, Union, Intersect, IntersectingQ, DisjointQ, SortBy and BinarySearch #373
• symbol string comparison bug #371
• Fix Begin/BeginPackage leaking user-visible symbols #352
• Fix TableForm and Dimensions with an empty list #343
• Trailing slash bug #337
• Global system bug #336
• Null comparison bug #371
• CompoundExpression Out[n] assignment bug #335 fixes #331
• load unevaluated cells #332

Performance improvements:

• Large expression formatting with $OutputSizeLimit #581
• Faster terminal output #579
• faster walk_paths #578
• faster flatten for Sequence symbols #577
• compilation for plotting #576
• Sequence optimisations #568
• Improvements to GatherBy #566
• optimised Expression creation #536
• Expression caching #535
• Definitions caching #507
• optimised Position, Cases, DeleteCases #503
• optimised StringSplit #502
• optimised $RecursionLimit #501
• optimised insert_rule #464
• optimised IntegerLength #462
• optimised BaseExpression creation #458
• No reevaluation of evaluated values #391
• shortcut rule lookup #389
• 15% performance boost by preventing some rule lookups #384
• 25% performance boost using same over __eq__
• n log n algorithm for Complement and DeleteDuplicates[] #373
• Avoid computing x^y in PowerMod[x, y, m] #342

New features:

• Improved syntax error messages #329
• SVD, LeastSquares, PseudoInverse #258, #321
• Python 3 support #317
• Improvements to Riffle #313
• Tweaks to PolarPlot #305
• StringTake #285
• Norm #268 #270
• Total, Accumulate, FoldList, Fold #264, #252
• Flatten #253 #269
• Which with symbolic arguments #250
• Min/Max with symbolic arguments #249

Dependency Updates:

• upgraded to ply 3.8 (issue #246)
• dropped interrupting cow #317
• added six (already required by django) #317

Bug fixes:

• Span issues with negative indices #196 fixed by #263 #325
• SVG export bug fixed by #324
• Django runserver threading issue #158 fixed by #323
• asymptote bug building docs #297 fixed by #317
• Simplify issue #254 fixed by #322
• ParametricPlot bug fixed by #320
• DensityPlot SVG regression in the web interface.
• main function for server.py #288, #289 fixed by #298
• ply table regeneration #294 fixed by #295
• Print bar issue #290 fixed by #293
• Quit[] index error #292 partially fixed by #307
• Quit definition fixed by #286
• Conjugate issue #272 fixed by #281

Features:

• Improvements to 3D Plotting, see #238
• Enable MathJax menu, see #236

Improvements to documentation:

• Thanks @bnjones!

Updated dependencies:

• upgrade to SymPy 0.7.6
• upgrade to ply3.6 (new parsetab format, see #246)
• upgrade to mpmath 0.19

Bug fixes:

• IntegerDigits[0]

New features:

• Readline tab completion
• automatic database initialisation
• support for wildcards in Clear and ClearAll
• add Conjugate
• More tests and documentation for Sequence
• Context support

Bugs fixed:

• Fix unevalued index handling (issue #217)
• Fix Solve treating one solution equal to 1 as a tautology (issue #208)
• Fix temporary symbols appearing in the result when taking derivatives with respect to t (issue #184)
• typo in save worksheet help text (issue #199)
• Fix mathicsserver wildcard address binding
• Fix Dot acting on matrices in MatrixForm (issue #145)
• Fix Sum behaviour when using range to generate index values (issue #149)
• Fix behaviour of plot with unevalated arguments (issue #150)
• Fix zero-width space between factors in MathJax output (issue #45)
• Fix {{2*a, 0},{0,0}}//MatrixForm crashing in the web interface (issue #182)

• ElementData using data from Wikipedia
• added Switch
• added DSolve and RSolve
• More Timing functions AbsoluteTiming, TimeUsed, SessionTime, Pause
• Date functions DateList, DateString, DateDifference, etc
• Parser rewritten using lex/yacc (PLY)
• Unicode character support
• PolarPlot
• IPython style (coloured) input
• VectorAnalysis` Package
• More special functions (Bessel functions and othogonal polynomials)
• More NumberTheory functions
• Import, Export, Get, Needs and other IO related functions
• PyPy compatibility
• added benchmarks (mathics/benchmark.py)
• BaseForm
• DeleteDuplicates
• Depth, Operate Through and other Structure related functions
• Changes to MatrixForm/TableForm printing
• Use interruptingcow to limit evaluation time
• Character Code functions