scidart 0.1.1

Cross-platform scientific library for Dart. The main goal of SciDart is run where Dart can run, in other words, run on Flutter, Dart CLI, Dart web, etc.

0.1.1

Fixes:

• randomArray2d(rows, columns) returns rows rows of columns values; it had rows and columns swapped
• fft with n larger than the input appends the zeros at the end, like numpy.fft.fft; they were added at the start, which changed the phase of the result. rfft gets the same fix
• toString of Array and Complex no longer starts with a line break, as their documentation shows. ArrayComplex prints on one line, and Array2d and Array3d print one row per line without trailing spaces

Docs:

• API documentation builds without warnings (unresolved references in doc comments)
• The scidart.org site is rebuilt after each release

0.1.0

New:

• NormalDistribution in stats: pdf, logPdf, cdf, sf, ppf, isf, interval, sample and Array versions, like scipy.stats.norm (#44)
• erf, erfc, arrayErf and arrayErfc in special
• rootScalar in optimize with the bisect, brentq, newton and secant methods, like scipy.optimize.root_scalar (#56)
• root in optimize for systems of equations with the lm (Levenberg-Marquardt), newton and broyden1 methods, returning an OptimizeResult, like scipy.optimize.root (#56)
• PolyFitMultivariate: polynomial regression with several features and outputs, with interaction terms in the order of sklearn.preprocessing.PolynomialFeatures; uses the minimum norm solution when there are more terms than samples (#55)

0.0.3

Breaking changes:

• rifft follows numpy.fft.irfft: the output length is 2 * (x.length - 1) by default and the new n argument sets it. Pass n with the original length to recover signals of odd length (#47)
• rifft returns the real part of the inverse FFT instead of the absolute value (#47)
• == of Array, Array2d, ArrayComplex and Complex returns false for other types and lengths instead of throwing, and hashCode is consistent with ==
• The minimum Dart SDK is 3.0.0

Fixes:

• PolyFit no longer loops forever with Infinity or NaN values, it throws FormatException (#65)
• PolyFit reduces the degree correctly when there are not enough distinct x values and scales the Vandermonde matrix like numpy with an overflow-safe norm, fixing wrong fits and negative R² (#37, #58). A degree larger than x.length - 1, or one whose powers of x overflow, is reduced
• QR uses the stable Householder sign again and matches the numpy signs; QR.isFullRank accepts a tolerance
• SVD throws FormatException for non-finite values instead of looping forever
• median no longer sorts the caller's array (#59)
• firwin accepts pass_zero as 'lowpass', 'highpass', 'bandpass' and 'bandstop' (#63 by j4ger)
• simpsArray with an even number of samples and no x uses dx instead of failing
• truncate works with values larger than 2^63

New:

• multimode returns all the most frequent values (#62)

Maintenance:

• Lints from package:lints replace the discontinued pedantic
• CI runs on Linux, macOS, Windows and Chrome, with the minimum and the stable SDK
• Publishing to pub.dev uses automated publishing (OIDC) when a v* tag is pushed

0.0.2-dev.13

• Sort array before median calculation (#59 Closed)

0.0.2-dev.12

• Add operation created for Array2d (#48 Closed)

0.0.2-dev.11

• Enhance complex concat (#49 Closed)

0.0.2-dev.10

• PR #46 by myConsciousness merged (unnecessary imports removed and YML update)

0.0.2-dev.9

• arange moved to deprecated and replaced by createArrayRange, #39 closed
• some typos fixed

0.0.2-dev.8

• Issue Infinite loop, memory exhausted with PolyFit(x, y, degree) #37, solved
• some typos fixed

0.0.2-dev.7

• Typos in the Source Code

0.0.2-dev.6

• Performance improvements for Array.add

0.0.2-dev.5

• Array2d.fromArray is not deep copying the arrays in the list of arrays #31
• subArray2d and getColumn new methods

0.0.2-dev.4

• singular value decomposition for matrix m != n (SVD)
• SVD bug to get U, V and S matrix fixed
• pseudo inverse matrix using Moore–Penrose (matrixPseudoInverse)
• new tests cases with matrix m != n
• new tests cases for SVD with matrix m != n
• matrixSub limit index added to avoid break
• array2dInverseOfEachElement bug for elements equal 0 fixed, just keep it 0

0.0.2-dev.3

• new array2d operations: array2dInverseOfEachElement, array2dPow

0.0.2-dev.2

• new array2d operations created: array2dAddToScalar, array2dDivisionToScalar, array2dMultiplyToScalar, array2dSubToScalar
• new array operation created: arrayAddToScalar
• new tests created for array and array2d operations

0.0.2-dev.1

• Null safety added to the package
• FFT bug to big power of 2 arrays fixed
• complexExp function created to calculate complex number natural exponent
• arrayConcat changed to concatenate N arrays

0.0.1-dev.12

• PR #22 merged: Remove unused dart: imports

0.0.1-dev.11

• Even and Odd number double check created;
• cross correlation for real and complex signals created;
• dartfmt applied in the code;

0.0.1-dev.10

• Even and Odd number int check created;
• matrix transpose bug fixed;
• classes documentations improved;

0.0.1-dev.9

• PolyFit issue #16;
• Dart lint warning fixed;

0.0.1-dev.8

• Logo url update.

0.0.1-dev.7

• License changed and documentation updates.

0.0.1-dev.6

• bug correction issue: https://github.com/scidart/scidart/issues/7 .

0.0.1-dev.5

• pubspec homepage updated.

0.0.1-dev.4

• README examples updated.

0.0.1-dev.3

• IO migrated to scidart_io.

0.0.1-dev.2

• Readme file updated.

0.0.1-dev.1

• NumDart, SciDart and IO fundamentals implemented and documented.