v2.1.0 Seki

The eleventh release of the Chalkboard library, version 2.1.0. Main updates include:

• Changed all of the matr commands to work significantly faster for 2x2, 3x3, and 4x4 matrices (for example, multiplications are about 67% faster, inversions are about 85% faster, and determinants are about 95% faster) when compared with previous versions of Chalkboard
• Added a total of 26 .isFoo commands in the matr, tens, and vect categories that check if a matrix, tensor, or vector fulfills a particular property (for example, matr.isDiagonal checks if a matrix is a diagonal matrix)
• There are also 14 more matrix commands, such as matr.diagonal, matr.eigenvalue, matr.eigenvector, matr.norm, and matr.perm
• Changed the parameters of matr.adjugate, matr.concat, matr.cofactor, matr.push, matr.pull, matr.toVector, and vect.toMatrix in a few different ways (details are in the detailed changelog below)
• Removed matr.binomial and matr.shift and replaced them with matr.lowerBinomial, matr.symmetricBinomial, matr.upperBinomial, matr.lowerShift, and matr.upperShift

Detailed changelog: CHANGELOG.md#v210---01222024
Commits: v2.0.0...v2.1.0
Chalkboard website: https://zushah.github.io/Chalkboard

v2.0.0 al-Khwarizmi

The tenth release of the Chalkboard library, version 2.0.0. Main updates include:

• Rewrote everything in TypeScript, applied ESLint and Prettier, and remade the documentation with TypeDoc
• Merged the vec2, vec3, and vec4 categories into one vect category
• Added the APPLY command which applies a callback function in an element-wise manner on a complex number, matrix, quaternion, tensor, or vector
• Renamed all of the .new commands to .init, real.function to real.define, comp.function to comp.define, and plot.function to plot.definition
• Discontinued the Processsing.js edition of the library, meaning it will no longer be updated and it will only be available on the Khan Academy release (it will no longer be available on GitHub)

Detailed changelog: CHANGELOG.md#v200---01082024
Commits: v1.7.0...v2.0.0
Chalkboard website: https://zushah.github.io/Chalkboard

v1.7.0 Descartes

The ninth release of the Chalkboard library, version 1.7.0. Main updates include:

• Added tensors (multidimensional multidimensional matrices, or n-dimensional arrays) with 29 commands in the new tens category
• There are also 12 more matrix commands: copying, resizing, five new primitive matrices (exchange, shift, binomial, Hilbert, Lehmer), concatenating, multiplying with vectors, Kronecker sum, Kronecker product, and converting to a tensor
• Two new Chalkboard globals: PARSEPREFIX, which makes it easier to add custom functions to Chalkboard functions than the init parameter in real.parse/comp.parse, and CONTEXT, which replaces the removed plot.CONTEXT
• The plot commands will now use the config.x and config.y options to determine their position on the canvas instead of config.origin
• Fixed matr.QRdecomp by adapting @JentGent's implementation

Detailed changelog: CHANGELOG.md#v170---01012024
Commits: v1.6.0...v1.7.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.6.0 Fermat

The eighth release of the Chalkboard library, version 1.6.0. Main updates include:

• Added inverse functions and operations (defining, evaluating, plotting, differentiating, etc.) for them
• Changed all of the plot commands to use an optional config object parameter to configure their customizations (size, color, domain, etc.) instead of separate parameters for each of them
• The canvas rendering context (CanvasRenderingContext2D) for the plot commands can now be set with plot.CONTEXT
• Many types of statistical regression models can be calculated with the new stat.regression command
• Matrix decomposition (or factorization) has been added with matr.LUdecomp and matr.QRdecomp

Detailed changelog: CHANGELOG.md#v160---12252023
Commits: v1.5.0...v1.6.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.5.0 Cauchy

The seventh release of the Chalkboard library, version 1.5.0. Main updates include:

• The library can now be installed with npm to be used for server-side applications
• Added complex-valued functions (definitions and evaluations) and complex-valued calculus operations (differentiation and integration)
• The domain coloring of a complex-valued function can be plotted with plot.function
• stat.gte and stat.lte have been removed and their functionalities have been respectively incorporated into stat.gt and stat.lt
• Added calc.Taylor and plot.Taylor for approximating functions with Taylor polynomials

Detailed changelog: CHANGELOG.md#v150---12182023
Commits: v1.4.0...v1.5.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.4.0 Herschel

The sixth release of the Chalkboard library, version 1.4.0. Main updates include:

• Added many new commands for arrays, including but not limited to: calculating different types of the norm (and the squared norm) of an array, calculating the array that has the numbers that are equal to, greater than (or equal to), less than (or equal to), or some compound inequality of another number or array, calculating the skewness and kurtosis of an array, and converting an array to a vector, matrix, object, or string
• Data can now be plotted with plot.barplot, plot.lineplot, and plot.scatterplot, and all of the plot commands have been changed to return arrays of all of the ordered pairs of the plotted points
• Calculating the angle between a point/vector and the positive x-axis on the Cartesian plane can be done with the new trig.arctan2 command
• Added new vector commands for calculating reflections and refractions
• Fixed calc.dfrdt which didn't work due to a slight misspelling in an if() statement

Detailed changelog: CHANGELOG.md#v140---12112023
Commits: v1.3.1...v1.4.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.3.1 Heaviside Patch

The fifth release of the Chalkboard library, version 1.3.1. This is a small patch for version 1.3.0 that fixes:

• matr.translator which had a misspelling
• matr.rotator which didn't work for two-dimensional rotations and also had a misspelling
• calc.grad which didn't work for vector fields

Again, this is only a patch for version 1.3.0. The initial release can be visited here.

Detailed changelog: v1.2.0...v1.3.1
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.3.0 Heaviside

The fourth release of the Chalkboard library, version 1.3.0. Main updates include:

• Lots of exciting new calc commands, including but not limited to: multivariable explicit functions, vector fields, 3D parametric curves and surfaces, second-order differentiation, partial differentiation, gradient, divergence, curl, double integration, arc length, surface area, and line/surface integration
• A new example which shows off the new vector field functionalities
• Several new and updated vector commands regarding conversions between coordinate systems (polar, cylindrical, spherical, etc.), conversions between matrices and vectors (specifiable rows/columns in matr.toVector), and vector projections/rejections
• All plot commands can now optionally have their opacity changed (with the rgba parameter, which used to only be rgb)
• The func.type value for parametric functions has been changed from "para" to either "curv" (for parametric curves) or "surf" (for parametric surfaces)

Thanks to @bhavjitChauhan for his contribution to this update regarding a bugfix with the matr.invert command.

Detailed changelog: v1.2.0...v1.3.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.2.0 Cayley

The third release of the Chalkboard library, version 1.2.0. Main updates include:

• Matrices of any and all dimensions are now fully supported for any and all matrix commands, there is no four-by-four dimension limit anymore
• New matrix commands for calculating the trace of a matrix, the rank, the row space, the column space, the null space, the exponentiation, the reduced row echelon form (Gaussian elimination), solving a multidimensional system of linear equations, and converting a matrix into an object
• All .display commands (plotting commands for complex numbers, vectors, and matrices) have been moved to the plot category
• All .mulScl commands (scalar multiplication commands for vectors and matrices) have been renamed as .scl
• Minor bugfix regarding the vec2.magset and vec3.magset commands

Detailed changelog: v1.1.0...v1.2.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html

v1.1.0 Riemann

The second release of the Chalkboard library, version 1.1.0. Main updates include:

• Differentiation and integration can now be calculated for all types of Chalkboard functions instead of only explicit Chalkboard functions
• Square matrices of any and all dimensions are able to have their determinant calculated
• Convolutions, cross-correlations, and autocorrelations are computable (and plottable) for all arrays and Chalkboard functions
• One of three featured new number theory commands calculates the nth prime number, another calculates a random number according to a Gaussian distribution, and another calculates the prime factors of a given number
• The integration command is even more accurate by the use of Simpson's rule instead of the trapezoidal Riemann sum

Detailed changelog: v1.0.0...v1.1.0
Chalkboard website: https://zushah.github.io/Chalkboard/home.html