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121 lines
3.0 KiB
JavaScript
121 lines
3.0 KiB
JavaScript
// test lsolve
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var assert = require('assert'),
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approx = require('../../../../tools/approx'),
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math = require('../../../../index');
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describe('lsolve', function () {
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it('should solve linear system 4 x 4, arrays', function () {
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var m =
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[
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[1, 0, 0, 0],
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[1, 1, 0, 0],
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[1, 1, 1, 0],
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[1, 1, 1, 1]
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];
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var b = [1, 2, 3, 4];
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var x = math.lsolve(m, b);
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approx.deepEqual(x, [1, 1, 1, 1]);
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});
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it('should solve linear system 4 x 4, array and column array', function () {
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var m =
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[
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[1, 0, 0, 0],
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[1, 1, 0, 0],
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[1, 1, 1, 0],
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[1, 1, 1, 1]
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];
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var b = [
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[1],
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[2],
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[3],
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[4]
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];
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var x = math.lsolve(m, b);
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approx.deepEqual(x, [[1], [1], [1], [1]]);
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});
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it('should solve linear system 4 x 4, matrices', function () {
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var m = math.matrix(
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[
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[1, 0, 0, 0],
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[1, 1, 0, 0],
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[1, 1, 1, 0],
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[1, 1, 1, 1]
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]);
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var b = math.matrix([1, 2, 3, 4]);
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var x = math.lsolve(m, b);
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assert(x instanceof math.type.Matrix);
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approx.deepEqual(x, math.matrix([[1], [1], [1], [1]]));
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});
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it('should solve linear system 4 x 4, sparse matrices', function () {
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var m = math.sparse(
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[
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[1, 0, 0, 0],
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[1, 1, 0, 0],
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[1, 1, 1, 0],
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[1, 1, 1, 1]
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]);
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var b = math.matrix([[1], [2], [3], [4]], 'sparse');
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var x = math.lsolve(m, b);
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assert(x instanceof math.type.Matrix);
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approx.deepEqual(x, math.matrix([[1], [1], [1], [1]]));
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});
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it('should solve linear system 4 x 4, matrix and column matrix', function () {
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var m = math.matrix(
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[
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[1, 0, 0, 0],
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[1, 1, 0, 0],
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[1, 1, 1, 0],
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[1, 1, 1, 1]
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]);
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var b = math.matrix([
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[1],
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[2],
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[3],
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[4]
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]);
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var x = math.lsolve(m, b);
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assert(x instanceof math.type.Matrix);
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approx.deepEqual(x, math.matrix([[1], [1], [1], [1]]));
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});
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it('should solve linear system 4 x 4, sparse matrix and column matrix', function () {
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var m = math.matrix(
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[
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[1, 0, 0, 0],
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[1, 1, 0, 0],
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[1, 1, 1, 0],
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[1, 1, 1, 1]
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], 'sparse');
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var b = math.matrix([
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[1],
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[2],
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[3],
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[4]
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], 'sparse');
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var x = math.lsolve(m, b);
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assert(x instanceof math.type.Matrix);
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approx.deepEqual(x, math.matrix([[1], [1], [1], [1]]));
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});
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it('should throw exception when matrix is singular', function () {
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assert.throws(function () { math.lsolve([[1, 1], [0, 0]], [1, 1]); }, /Error: Linear system cannot be solved since matrix is singular/);
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assert.throws(function () { math.lsolve(math.matrix([[1, 1], [0, 0]], 'dense'), [1, 1]); }, /Error: Linear system cannot be solved since matrix is singular/);
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assert.throws(function () { math.lsolve(math.matrix([[1, 1], [0, 0]], 'sparse'), [1, 1]); }, /Error: Linear system cannot be solved since matrix is singular/);
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});
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}); |