Changeset 18211 for trunk/HeuristicLab.Tests
- Timestamp:
- 01/27/22 11:02:45 (3 years ago)
- File:
-
- 1 edited
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trunk/HeuristicLab.Tests/HeuristicLab.Problems.DataAnalysis.Symbolic-3.4/InfixExpressionParserTest.cs
r18203 r18211 22 22 23 23 using System; 24 using System.Linq; 24 25 using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding; 25 26 using Microsoft.VisualStudio.TestTools.UnitTesting; … … 37 38 Assert.AreEqual("3", formatter.Format(parser.Parse("3"))); 38 39 Assert.AreEqual("3 * 3", formatter.Format(parser.Parse("3*3"))); 39 Assert.AreEqual("3 * 4", formatter.Format(parser.Parse("3 * 4")));40 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123E-03")));41 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123e-03")));42 Assert.AreEqual("123000", formatter.Format(parser.Parse("123e+03")));43 Assert.AreEqual("123000", formatter.Format(parser.Parse("123E+03")));44 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0E-03")));45 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0e-03")));46 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0e+03")));47 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0E+03")));48 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0E-3")));49 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0e-3")));50 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0e+3")));51 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0E+3")));52 53 Assert.AreEqual("3.1415 + 2", formatter.Format(parser.Parse("3.1415+2.0")));54 Assert.AreEqual("3.1415 / 2", formatter.Format(parser.Parse("3.1415/2.0")));55 Assert.AreEqual("3.1415 * 2", formatter.Format(parser.Parse("3.1415*2.0")));40 Assert.AreEqual("3 * 4", formatter.Format(parser.Parse("3 * 4"))); 41 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123E-03"))); 42 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123e-03"))); 43 Assert.AreEqual("123000", formatter.Format(parser.Parse("123e+03"))); 44 Assert.AreEqual("123000", formatter.Format(parser.Parse("123E+03"))); 45 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0E-03"))); 46 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0e-03"))); 47 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0e+03"))); 48 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0E+03"))); 49 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0E-3"))); 50 Assert.AreEqual("0.123", formatter.Format(parser.Parse("123.0e-3"))); 51 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0e+3"))); 52 Assert.AreEqual("123000", formatter.Format(parser.Parse("123.0E+3"))); 53 54 Assert.AreEqual("3.1415 + 2", formatter.Format(parser.Parse("3.1415+2.0"))); 55 Assert.AreEqual("3.1415 / 2", formatter.Format(parser.Parse("3.1415/2.0"))); 56 Assert.AreEqual("3.1415 * 2", formatter.Format(parser.Parse("3.1415*2.0"))); 56 57 Assert.AreEqual("3.1415 - 2", formatter.Format(parser.Parse("3.1415-2.0"))); 57 58 // round-trip 58 Assert.AreEqual("3.1415 - 2", formatter.Format(parser.Parse(formatter.Format(parser.Parse("3.1415-2.0")))));59 Assert.AreEqual("3.1415 + 2", formatter.Format(parser.Parse("3.1415+(2.0)")));59 Assert.AreEqual("3.1415 - 2", formatter.Format(parser.Parse(formatter.Format(parser.Parse("3.1415-2.0"))))); 60 Assert.AreEqual("3.1415 + 2", formatter.Format(parser.Parse("3.1415+(2.0)"))); 60 61 Assert.AreEqual("3.1415 + 2", formatter.Format(parser.Parse("(3.1415+(2.0))"))); 61 62 62 63 63 Assert.AreEqual("LOG(3)", formatter.Format(parser.Parse("log(3)")));64 Assert.AreEqual("LOG(-3)", formatter.Format(parser.Parse("log(-3)")));65 Assert.AreEqual("EXP(3)", formatter.Format(parser.Parse("exp(3)")));66 Assert.AreEqual("EXP(-3)", formatter.Format(parser.Parse("exp(-3)")));64 Assert.AreEqual("LOG(3)", formatter.Format(parser.Parse("log(3)"))); 65 Assert.AreEqual("LOG(-3)", formatter.Format(parser.Parse("log(-3)"))); 66 Assert.AreEqual("EXP(3)", formatter.Format(parser.Parse("exp(3)"))); 67 Assert.AreEqual("EXP(-3)", formatter.Format(parser.Parse("exp(-3)"))); 67 68 Assert.AreEqual("SQRT(3)", formatter.Format(parser.Parse("sqrt(3)"))); 68 69 69 70 Assert.AreEqual("SQR(-3)", formatter.Format(parser.Parse("sqr((-3))"))); 70 71 71 Assert.AreEqual("3 / 3 + 2 / 2 + 1 / 1", formatter.Format(parser.Parse("3/3+2/2+1/1")));72 Assert.AreEqual("3 / 3 + 2 / 2 + 1 / 1", formatter.Format(parser.Parse("3/3+2/2+1/1"))); 72 73 Assert.AreEqual("-3 + 30 - 2 + 20 - 1 + 10", formatter.Format(parser.Parse("-3+30-2+20-1+10"))); 73 74 … … 79 80 80 81 // signed variables / constants 81 Assert.AreEqual("-1 *'x1'", formatter.Format(parser.Parse("-x1")));82 Assert.AreEqual("-1 * 'x1'", formatter.Format(parser.Parse("-x1"))); 82 83 Assert.AreEqual("1", formatter.Format(parser.Parse("--1.0"))); 83 84 Assert.AreEqual("1", formatter.Format(parser.Parse("----1.0"))); … … 87 88 88 89 89 Assert.AreEqual("'x1'", formatter.Format(parser.Parse("\"x1\"")));90 Assert.AreEqual("'var name'", formatter.Format(parser.Parse("\'var name\'")));91 Assert.AreEqual("'var name'", formatter.Format(parser.Parse("\"var name\"")));92 Assert.AreEqual("'1'", formatter.Format(parser.Parse("\"1\"")));93 94 Assert.AreEqual("'var \" name'", formatter.Format(parser.Parse("'var \" name\'")));90 Assert.AreEqual("'x1'", formatter.Format(parser.Parse("\"x1\""))); 91 Assert.AreEqual("'var name'", formatter.Format(parser.Parse("\'var name\'"))); 92 Assert.AreEqual("'var name'", formatter.Format(parser.Parse("\"var name\""))); 93 Assert.AreEqual("'1'", formatter.Format(parser.Parse("\"1\""))); 94 95 Assert.AreEqual("'var \" name'", formatter.Format(parser.Parse("'var \" name\'"))); 95 96 Assert.AreEqual("\"var ' name\"", formatter.Format(parser.Parse("\"var \' name\""))); 96 97 97 98 98 Assert.AreEqual("'x1' * 'x2'", formatter.Format(parser.Parse("\"x1\"*\"x2\"")));99 Assert.AreEqual("'x1' * 'x2' + 'x3' * 'x4'", formatter.Format(parser.Parse("\"x1\"*\"x2\"+\"x3\"*\"x4\"")));99 Assert.AreEqual("'x1' * 'x2'", formatter.Format(parser.Parse("\"x1\"*\"x2\""))); 100 Assert.AreEqual("'x1' * 'x2' + 'x3' * 'x4'", formatter.Format(parser.Parse("\"x1\"*\"x2\"+\"x3\"*\"x4\""))); 100 101 Assert.AreEqual("'x1' * 'x2' + 'x3' * 'x4'", formatter.Format(parser.Parse("x1*x2+x3*x4"))); 101 102 102 103 103 Assert.AreEqual("3 ^ 2", formatter.Format(parser.Parse("POW(3, 2)")));104 Assert.AreEqual("3.1 ^ 2.1", formatter.Format(parser.Parse("POW(3.1, 2.1)")));105 Assert.AreEqual("3.1 ^ 2.1", formatter.Format(parser.Parse("POW(3.1 , 2.1)")));106 Assert.AreEqual("3.1 ^ 2.1", formatter.Format(parser.Parse("POW(3.1 ,2.1)")));107 Assert.AreEqual("-3.1 ^ -2.1", formatter.Format(parser.Parse("POW(-3.1 , - 2.1)")));108 Assert.AreEqual("ROOT(3, 2)", formatter.Format(parser.Parse("ROOT(3, 2)")));109 Assert.AreEqual("ROOT(3.1, 2.1)", formatter.Format(parser.Parse("ROOT(3.1, 2.1)")));110 Assert.AreEqual("ROOT(3.1, 2.1)", formatter.Format(parser.Parse("ROOT(3.1 , 2.1)")));111 Assert.AreEqual("ROOT(3.1, 2.1)", formatter.Format(parser.Parse("ROOT(3.1 ,2.1)")));104 Assert.AreEqual("3 ^ 2", formatter.Format(parser.Parse("POW(3, 2)"))); 105 Assert.AreEqual("3.1 ^ 2.1", formatter.Format(parser.Parse("POW(3.1, 2.1)"))); 106 Assert.AreEqual("3.1 ^ 2.1", formatter.Format(parser.Parse("POW(3.1 , 2.1)"))); 107 Assert.AreEqual("3.1 ^ 2.1", formatter.Format(parser.Parse("POW(3.1 ,2.1)"))); 108 Assert.AreEqual("-3.1 ^ -2.1", formatter.Format(parser.Parse("POW(-3.1 , - 2.1)"))); 109 Assert.AreEqual("ROOT(3, 2)", formatter.Format(parser.Parse("ROOT(3, 2)"))); 110 Assert.AreEqual("ROOT(3.1, 2.1)", formatter.Format(parser.Parse("ROOT(3.1, 2.1)"))); 111 Assert.AreEqual("ROOT(3.1, 2.1)", formatter.Format(parser.Parse("ROOT(3.1 , 2.1)"))); 112 Assert.AreEqual("ROOT(3.1, 2.1)", formatter.Format(parser.Parse("ROOT(3.1 ,2.1)"))); 112 113 Assert.AreEqual("ROOT(-3.1, -2.1)", formatter.Format(parser.Parse("ROOT(-3.1 , -2.1)"))); 113 114 114 Assert.AreEqual("IF(GT(0, 1), 1, 0)", formatter.Format(parser.Parse("IF(GT( 0, 1), 1, 0)")));115 Assert.AreEqual("IF(LT(0, 1), 1, 0)", formatter.Format(parser.Parse("IF(LT(0,1), 1 , 0)")));116 Assert.AreEqual("LAG('x', 1)", formatter.Format(parser.Parse("LAG(x, 1)")));117 Assert.AreEqual("LAG('x', -1)", formatter.Format(parser.Parse("LAG(x, -1)")));118 Assert.AreEqual("LAG('x', 1)", formatter.Format(parser.Parse("LAG(x, +1)")));115 Assert.AreEqual("IF(GT(0, 1), 1, 0)", formatter.Format(parser.Parse("IF(GT( 0, 1), 1, 0)"))); 116 Assert.AreEqual("IF(LT(0, 1), 1, 0)", formatter.Format(parser.Parse("IF(LT(0,1), 1 , 0)"))); 117 Assert.AreEqual("LAG('x', 1)", formatter.Format(parser.Parse("LAG(x, 1)"))); 118 Assert.AreEqual("LAG('x', -1)", formatter.Format(parser.Parse("LAG(x, -1)"))); 119 Assert.AreEqual("LAG('x', 1)", formatter.Format(parser.Parse("LAG(x, +1)"))); 119 120 Assert.AreEqual("'x' * LAG('x', 1)", formatter.Format(parser.Parse("x * LAG('x', +1)"))); 120 121 121 122 // factor variables 122 Assert.AreEqual("'x'[1] * 'y'", formatter.Format(parser.Parse("x [1.0] * y")));123 Assert.AreEqual("'x'[1, 2] * 'y'[1, 2]", formatter.Format(parser.Parse("x [1.0, 2.0] * y [1.0, 2.0]")));124 Assert.AreEqual("'x'[1] * 'y'", formatter.Format(parser.Parse("x[1] * y")));125 Assert.AreEqual("'x'[1, 2] * 'y'[1, 2]", formatter.Format(parser.Parse("x[1, 2] * y [1, 2]")));126 Assert.AreEqual("'x'[1] * 'y'", formatter.Format(parser.Parse("x [+1.0] * y")));127 Assert.AreEqual("'x'[-1] * 'y'", formatter.Format(parser.Parse("x [-1.0] * y")));123 Assert.AreEqual("'x'[1] * 'y'", formatter.Format(parser.Parse("x [1.0] * y"))); 124 Assert.AreEqual("'x'[1, 2] * 'y'[1, 2]", formatter.Format(parser.Parse("x [1.0, 2.0] * y [1.0, 2.0]"))); 125 Assert.AreEqual("'x'[1] * 'y'", formatter.Format(parser.Parse("x[1] * y"))); 126 Assert.AreEqual("'x'[1, 2] * 'y'[1, 2]", formatter.Format(parser.Parse("x[1, 2] * y [1, 2]"))); 127 Assert.AreEqual("'x'[1] * 'y'", formatter.Format(parser.Parse("x [+1.0] * y"))); 128 Assert.AreEqual("'x'[-1] * 'y'", formatter.Format(parser.Parse("x [-1.0] * y"))); 128 129 Assert.AreEqual("'x'[-1, -2] * 'y'[1, 2]", formatter.Format(parser.Parse("x [-1.0, -2.0] * y [+1.0, +2.0]"))); 129 130 130 131 // one-hot for factor 131 Assert.AreEqual("'x' = 'val' * 'y'", formatter.Format(parser.Parse("x='val' * y")));132 Assert.AreEqual("'x' = 'val'", formatter.Format(parser.Parse("x = 'val'")));133 Assert.AreEqual("'x' = 'val'", formatter.Format(parser.Parse("x = \"val\"")));134 Assert.AreEqual("1 * 'x' = 'val'", formatter.Format(parser.Parse("1.0 * x = val")));135 Assert.AreEqual("-1 * 'x' = 'val'", formatter.Format(parser.Parse("-1.0 * x = val")));132 Assert.AreEqual("'x' = 'val' * 'y'", formatter.Format(parser.Parse("x='val' * y"))); 133 Assert.AreEqual("'x' = 'val'", formatter.Format(parser.Parse("x = 'val'"))); 134 Assert.AreEqual("'x' = 'val'", formatter.Format(parser.Parse("x = \"val\""))); 135 Assert.AreEqual("1 * 'x' = 'val'", formatter.Format(parser.Parse("1.0 * x = val"))); 136 Assert.AreEqual("-1 * 'x' = 'val'", formatter.Format(parser.Parse("-1.0 * x = val"))); 136 137 Assert.AreEqual("1 * 'x' = 'val1' + 'y' = 'val2'", formatter.Format(parser.Parse("+1.0 * \"x\" = val1 + y = \"val2\""))); 137 138 … … 143 144 Assert.AreEqual("-1", formatter.Format(parser.Parse("< num =-1.0>"))); 144 145 Assert.AreEqual("-1", formatter.Format(parser.Parse("< num = - 1.0>"))); 145 146 146 147 // numeric parameter with sign 147 148 Assert.AreEqual("1", formatter.Format(parser.Parse("-<num=-1.0>"))); … … 151 152 152 153 { 153 // a tree with single-ar itymultiplication and addition154 // a tree with single-argument multiplication and addition 154 155 // ... 155 156 // * … … 173 174 var t = new SymbolicExpressionTree(root); 174 175 175 Assert.AreEqual(" ('x1' + 'x2')", formatter.Format(t)); // TODO parenthesis not strictly required here176 Assert.AreEqual("'x1' + 'x2'", formatter.Format(t)); 176 177 } 177 178 { … … 230 231 var t = new SymbolicExpressionTree(root); 231 232 232 Assert.AreEqual("SIN(('x1' + 'x2'))", formatter.Format(t)); // TODO would be better to prevent double parenthesis here 233 Assert.AreEqual("SIN('x1' + 'x2')", formatter.Format(t)); 234 } 235 { 236 // single-argument subtraction 237 // - 238 // | 239 // v1 240 var root = new ProgramRootSymbol().CreateTreeNode(); 241 var start = new StartSymbol().CreateTreeNode(); 242 var sub = new Subtraction().CreateTreeNode(); 243 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = -1.0; 244 sub.AddSubtree(var1); 245 start.AddSubtree(sub); 246 root.AddSubtree(start); 247 var t = new SymbolicExpressionTree(root); 248 249 Assert.AreEqual("-(-1 * 'x1')", formatter.Format(t)); // TODO: same as --1 * 'x1' and just 'x1' 250 } 251 { 252 // single-argument subtraction 253 // - 254 // | 255 // + 256 // / \ 257 // v1 v2 258 var root = new ProgramRootSymbol().CreateTreeNode(); 259 var start = new StartSymbol().CreateTreeNode(); 260 var sub = new Subtraction().CreateTreeNode(); 261 var add = new Addition().CreateTreeNode(); 262 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0; 263 var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0; 264 add.AddSubtree(var1); 265 add.AddSubtree(var2); 266 sub.AddSubtree(add); 267 start.AddSubtree(sub); 268 root.AddSubtree(start); 269 var t = new SymbolicExpressionTree(root); 270 271 Assert.AreEqual("-('x1' + 'x2')", formatter.Format(t)); 272 } 273 { 274 // ^ 275 // / \ 276 // * v3 277 // / \ 278 // v1 v2 279 var root = new ProgramRootSymbol().CreateTreeNode(); 280 var start = new StartSymbol().CreateTreeNode(); 281 var pow = new Power().CreateTreeNode(); 282 var mul = new Multiplication().CreateTreeNode(); 283 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0; 284 var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0; 285 var var3 = (VariableTreeNode)new Variable().CreateTreeNode(); var3.VariableName = "x3"; var3.Weight = 1.0; 286 mul.AddSubtree(var1); 287 mul.AddSubtree(var2); 288 pow.AddSubtree(mul); 289 pow.AddSubtree(var3); 290 start.AddSubtree(pow); 291 root.AddSubtree(start); 292 var t = new SymbolicExpressionTree(root); 293 294 Assert.AreEqual("('x1' * 'x2') ^ 'x3'", formatter.Format(t)); 295 } 296 { 297 // ^ 298 // / \ 299 // * * 300 // / \ / \ 301 // v1 v2 v3 v4 302 var root = new ProgramRootSymbol().CreateTreeNode(); 303 var start = new StartSymbol().CreateTreeNode(); 304 var pow = new Power().CreateTreeNode(); 305 var mul1 = new Multiplication().CreateTreeNode(); 306 var mul2 = new Multiplication().CreateTreeNode(); 307 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0; 308 var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0; 309 var var3 = (VariableTreeNode)new Variable().CreateTreeNode(); var3.VariableName = "x3"; var3.Weight = 1.0; 310 var var4 = (VariableTreeNode)new Variable().CreateTreeNode(); var4.VariableName = "x4"; var4.Weight = 1.0; 311 mul1.AddSubtree(var1); 312 mul1.AddSubtree(var2); 313 mul2.AddSubtree(var3); 314 mul2.AddSubtree(var4); 315 pow.AddSubtree(mul1); 316 pow.AddSubtree(mul2); 317 start.AddSubtree(pow); 318 root.AddSubtree(start); 319 var t = new SymbolicExpressionTree(root); 320 321 Assert.AreEqual("('x1' * 'x2') ^ ('x3' * 'x4')", formatter.Format(t)); 322 } 323 { 324 // * 325 // / \ 326 // * / 327 // / \ / \ 328 // v1 v2 v3 v4 329 var root = new ProgramRootSymbol().CreateTreeNode(); 330 var start = new StartSymbol().CreateTreeNode(); 331 var mul1 = new Multiplication().CreateTreeNode(); 332 var mul2 = new Multiplication().CreateTreeNode(); 333 var div = new Division().CreateTreeNode(); 334 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0; 335 var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0; 336 var var3 = (VariableTreeNode)new Variable().CreateTreeNode(); var3.VariableName = "x3"; var3.Weight = 1.0; 337 var var4 = (VariableTreeNode)new Variable().CreateTreeNode(); var4.VariableName = "x4"; var4.Weight = 1.0; 338 mul2.AddSubtree(var1); 339 mul2.AddSubtree(var2); 340 div.AddSubtree(var3); 341 div.AddSubtree(var4); 342 mul1.AddSubtree(mul2); 343 mul1.AddSubtree(div); 344 start.AddSubtree(mul1); 345 root.AddSubtree(start); 346 var t = new SymbolicExpressionTree(root); 347 348 Assert.AreEqual("'x1' * 'x2' * 'x3' / 'x4'", formatter.Format(t)); // same as x1 * x2 * (x3 / x4) 349 } 350 { 351 // * 352 // / \ 353 // div div 354 // / \ / \ 355 // v1 v2 v3 v4 356 var root = new ProgramRootSymbol().CreateTreeNode(); 357 var start = new StartSymbol().CreateTreeNode(); 358 var mul = new Multiplication().CreateTreeNode(); 359 var div1 = new Division().CreateTreeNode(); 360 var div2 = new Division().CreateTreeNode(); 361 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0; 362 var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0; 363 var var3 = (VariableTreeNode)new Variable().CreateTreeNode(); var3.VariableName = "x3"; var3.Weight = 1.0; 364 var var4 = (VariableTreeNode)new Variable().CreateTreeNode(); var4.VariableName = "x4"; var4.Weight = 1.0; 365 div1.AddSubtree(var1); 366 div1.AddSubtree(var2); 367 div2.AddSubtree(var3); 368 div2.AddSubtree(var4); 369 mul.AddSubtree(div1); 370 mul.AddSubtree(div2); 371 start.AddSubtree(mul); 372 root.AddSubtree(start); 373 var t = new SymbolicExpressionTree(root); 374 375 Assert.AreEqual("'x1' / 'x2' * 'x3' / 'x4'", formatter.Format(t)); // same as x1 / x2 * (x3 / x4) 376 } 377 { 378 // div 379 // / \ 380 // div * 381 // / \ / \ 382 // v1 v2 v3 v4 383 // 384 var root = new ProgramRootSymbol().CreateTreeNode(); 385 var start = new StartSymbol().CreateTreeNode(); 386 var mul = new Multiplication().CreateTreeNode(); 387 var div2 = new Division().CreateTreeNode(); 388 var div1 = new Division().CreateTreeNode(); 389 var var1 = (VariableTreeNode)new Variable().CreateTreeNode(); var1.VariableName = "x1"; var1.Weight = 1.0; 390 var var2 = (VariableTreeNode)new Variable().CreateTreeNode(); var2.VariableName = "x2"; var2.Weight = 1.0; 391 var var3 = (VariableTreeNode)new Variable().CreateTreeNode(); var3.VariableName = "x3"; var3.Weight = 1.0; 392 var var4 = (VariableTreeNode)new Variable().CreateTreeNode(); var4.VariableName = "x4"; var4.Weight = 1.0; 393 div2.AddSubtree(var1); 394 div2.AddSubtree(var2); 395 mul.AddSubtree(var3); 396 mul.AddSubtree(var4); 397 div1.AddSubtree(div2); 398 div1.AddSubtree(mul); 399 start.AddSubtree(div1); 400 root.AddSubtree(start); 401 var t = new SymbolicExpressionTree(root); 402 403 Assert.AreEqual("'x1' / 'x2' / ('x3' * 'x4')", formatter.Format(t)); 404 } 405 406 { 407 // check random trees after formatting & parsing again 408 409 var rand = new Random.MersenneTwister(1234); 410 var interpreter = new SymbolicDataAnalysisExpressionTreeInterpreter(); // use an interpreter that supports boolean functions 411 var xy = new double[100, 4]; 412 for (int i = 0; i < xy.GetLength(0); i++) 413 for (int j = 0; j < xy.GetLength(1); j++) 414 xy[i, j] = rand.NextDouble(); 415 416 var ds = new Dataset(new string[] { "a", "b", "c", "y" }, xy); 417 var rows = Enumerable.Range(0, xy.GetLength(1)).ToArray(); 418 var grammar = new TypeCoherentExpressionGrammar(); 419 grammar.ConfigureAsDefaultRegressionGrammar(); 420 grammar.Symbols.OfType<Logarithm>().First().Enabled = true; // enable a function 421 grammar.Symbols.OfType<Exponential>().First().Enabled = true; // enable a function 422 grammar.Symbols.OfType<AnalyticQuotient>().First().Enabled = true; // enable a function with two arguments 423 grammar.Symbols.OfType<Power>().First().Enabled = true; // another function with two arguments 424 grammar.Symbols.OfType<And>().First().Enabled = true; // enable Boolean operators 425 grammar.Symbols.OfType<Or>().First().Enabled = true; 426 grammar.Symbols.OfType<Xor>().First().Enabled = true; 427 grammar.Symbols.OfType<Not>().First().Enabled = true; 428 grammar.Symbols.OfType<IfThenElse>().First().Enabled = true; // enable if-then-else function 429 // test multi-argument versions of operators 430 grammar.SetSubtreeCount(grammar.Symbols.OfType<Division>().First(), 1, 4); 431 grammar.SetSubtreeCount(grammar.Symbols.OfType<Subtraction>().First(), 1, 2); 432 grammar.SetSubtreeCount(grammar.Symbols.OfType<Addition>().First(), 1, 4); 433 grammar.SetSubtreeCount(grammar.Symbols.OfType<Multiplication>().First(), 1, 4); 434 grammar.SetSubtreeCount(grammar.Symbols.OfType<And>().First(), 1, 4); 435 grammar.SetSubtreeCount(grammar.Symbols.OfType<Or>().First(), 1, 4); 436 grammar.SetSubtreeCount(grammar.Symbols.OfType<Xor>().First(), 1, 4); 437 grammar.ConfigureVariableSymbols(new RegressionProblemData(ds, new string[] { "a", "b", "c" }, "y")); 438 var fmt = new SymbolicExpressionTreeStringFormatter(); 439 for (int i = 0; i < 100000; i++) { 440 var t = ProbabilisticTreeCreator.Create(rand, grammar, 15, 8); 441 var p1 = interpreter.GetSymbolicExpressionTreeValues(t, ds, rows).ToArray(); 442 var p2 = interpreter.GetSymbolicExpressionTreeValues(parser.Parse(formatter.Format(t)), ds, rows).ToArray(); // test formatter, and that parser can read the expression again, and that the evaluation is the same 443 for (int j = 0; j < p1.Length; j++) { 444 if (double.IsNaN(p1[j]) && double.IsNaN(p2[j])) continue; 445 Assert.AreEqual(p1[j], p2[j], Math.Abs(p1[j] * 1e-6), $"Problem in formatted expression:\n{formatter.Format(t)}\n{fmt.Format(t)}"); 446 } 447 } 233 448 } 234 449 }
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