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104 lines
3.4 KiB
JavaScript
104 lines
3.4 KiB
JavaScript
// test transpose
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var assert = require('assert'),
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math = require('../../../index'),
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transpose = math.transpose;
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describe('transpose', function() {
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it('should transpose a scalar', function() {
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assert.deepEqual(transpose(3), 3);
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});
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it('should transpose a vector', function() {
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assert.deepEqual(transpose([1,2,3]), [1,2,3]);
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assert.deepEqual(transpose(math.matrix([1,2,3]).toArray()), [1,2,3]);
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});
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it('should transpose a 2d matrix', function() {
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assert.deepEqual(transpose([[1,2,3],[4,5,6]]), [[1,4],[2,5],[3,6]]);
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assert.deepEqual(transpose(math.matrix([[1,2,3],[4,5,6]]).toArray()), [[1,4],[2,5],[3,6]]);
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assert.deepEqual(transpose([[1,2],[3,4]]), [[1,3],[2,4]]);
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assert.deepEqual(transpose([[1,2,3,4]]), [[1],[2],[3],[4]]);
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});
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it('should throw an error for invalid matrix transpose', function() {
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assert.throws(function () {
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assert.deepEqual(transpose([[]]), [[]]); // size [2,0]
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});
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assert.throws(function () {
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transpose([[[1],[2]],[[3],[4]]]); // size [2,2,1]
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});
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});
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it('should throw an error if called with an invalid number of arguments', function() {
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assert.throws(function () {transpose();}, /TypeError: Too few arguments/);
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assert.throws(function () {transpose([1,2],2);}, /TypeError: Too many arguments/);
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});
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describe('DenseMatrix', function () {
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it('should transpose a 2d matrix', function() {
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var m = math.matrix([[1,2,3],[4,5,6]]);
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var t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1,4],[2,5],[3,6]]);
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m = math.matrix([[1,4],[2,5],[3,6]]);
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t = transpose(m);
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assert.deepEqual(t.toArray(), [[1,2,3],[4,5,6]]);
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m = math.matrix([[1,2],[3,4]]);
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t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1,3],[2,4]]);
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m = math.matrix([[1,2,3,4]]);
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t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1],[2],[3],[4]]);
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m = math.matrix([[1,2,3,4]], 'dense', 'number');
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t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1],[2],[3],[4]]);
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assert.ok(t.datatype() === 'number');
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});
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it('should throw an error for invalid matrix transpose', function() {
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var m = math.matrix([[]]);
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assert.throws(function () { transpose(m); });
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m = math.matrix([[[1],[2]],[[3],[4]]]);
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assert.throws(function () { transpose(m); });
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});
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});
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describe('SparseMatrix', function () {
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it('should transpose a 2d matrix', function() {
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var m = math.sparse([[1,2,3],[4,5,6]]);
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var t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1,4],[2,5],[3,6]]);
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m = math.sparse([[1,4],[2,5],[3,6]]);
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t = transpose(m);
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assert.deepEqual(t.toArray(), [[1,2,3],[4,5,6]]);
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m = math.sparse([[1,2],[3,4]]);
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t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1,3],[2,4]]);
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m = math.sparse([[1,2,3,4]], 'number');
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t = transpose(m);
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assert.deepEqual(t.valueOf(), [[1],[2],[3],[4]]);
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assert.ok(t.datatype() === 'number');
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});
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it('should throw an error for invalid matrix transpose', function() {
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var m = math.matrix([[]], 'sparse');
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assert.throws(function () { transpose(m); });
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});
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});
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it('should LaTeX transpose', function () {
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var expression = math.parse('transpose([[1,2],[3,4]])');
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assert.equal(expression.toTex(), '\\left(\\begin{bmatrix}1&2\\\\3&4\\\\\\end{bmatrix}\\right)^\\top');
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});
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});
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