mathjs/test/unit-tests/function/matrix/transpose.test.js
Jos de Jong 6f00715754
Specify import require paths (continuation of #1941) (#1962)
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2020-09-20 18:01:29 +02:00

102 lines
3.5 KiB
JavaScript

// test transpose
import assert from 'assert'
import math from '../../../../src/defaultInstance.js'
const transpose = math.transpose
describe('transpose', function () {
it('should transpose a scalar', function () {
assert.deepStrictEqual(transpose(3), 3)
})
it('should transpose a vector', function () {
assert.deepStrictEqual(transpose([1, 2, 3]), [1, 2, 3])
assert.deepStrictEqual(transpose(math.matrix([1, 2, 3]).toArray()), [1, 2, 3])
})
it('should transpose a 2d matrix', function () {
assert.deepStrictEqual(transpose([[1, 2, 3], [4, 5, 6]]), [[1, 4], [2, 5], [3, 6]])
assert.deepStrictEqual(transpose(math.matrix([[1, 2, 3], [4, 5, 6]]).toArray()), [[1, 4], [2, 5], [3, 6]])
assert.deepStrictEqual(transpose([[1, 2], [3, 4]]), [[1, 3], [2, 4]])
assert.deepStrictEqual(transpose([[1, 2, 3, 4]]), [[1], [2], [3], [4]])
})
it('should throw an error for invalid matrix transpose', function () {
assert.throws(function () {
assert.deepStrictEqual(transpose([[]]), [[]]) // size [2,0]
})
assert.throws(function () {
transpose([[[1], [2]], [[3], [4]]]) // size [2,2,1]
})
})
it('should throw an error if called with an invalid number of arguments', function () {
assert.throws(function () { transpose() }, /TypeError: Too few arguments/)
assert.throws(function () { transpose([1, 2], 2) }, /TypeError: Too many arguments/)
})
describe('DenseMatrix', function () {
it('should transpose a 2d matrix', function () {
let m = math.matrix([[1, 2, 3], [4, 5, 6]])
let t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1, 4], [2, 5], [3, 6]])
m = math.matrix([[1, 4], [2, 5], [3, 6]])
t = transpose(m)
assert.deepStrictEqual(t.toArray(), [[1, 2, 3], [4, 5, 6]])
m = math.matrix([[1, 2], [3, 4]])
t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1, 3], [2, 4]])
m = math.matrix([[1, 2, 3, 4]])
t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1], [2], [3], [4]])
m = math.matrix([[1, 2, 3, 4]], 'dense', 'number')
t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1], [2], [3], [4]])
assert.ok(t.datatype() === 'number')
})
it('should throw an error for invalid matrix transpose', function () {
let m = math.matrix([[]])
assert.throws(function () { transpose(m) })
m = math.matrix([[[1], [2]], [[3], [4]]])
assert.throws(function () { transpose(m) })
})
})
describe('SparseMatrix', function () {
it('should transpose a 2d matrix', function () {
let m = math.sparse([[1, 2, 3], [4, 5, 6]])
let t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1, 4], [2, 5], [3, 6]])
m = math.sparse([[1, 4], [2, 5], [3, 6]])
t = transpose(m)
assert.deepStrictEqual(t.toArray(), [[1, 2, 3], [4, 5, 6]])
m = math.sparse([[1, 2], [3, 4]])
t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1, 3], [2, 4]])
m = math.sparse([[1, 2, 3, 4]], 'number')
t = transpose(m)
assert.deepStrictEqual(t.valueOf(), [[1], [2], [3], [4]])
assert.ok(t.datatype() === 'number')
})
it('should throw an error for invalid matrix transpose', function () {
const m = math.matrix([[]], 'sparse')
assert.throws(function () { transpose(m) })
})
})
it('should LaTeX transpose', function () {
const expression = math.parse('transpose([[1,2],[3,4]])')
assert.strictEqual(expression.toTex(), '\\left(\\begin{bmatrix}1&2\\\\3&4\\\\\\end{bmatrix}\\right)^\\top')
})
})