Package ca.nengo.math.impl

Examples of ca.nengo.math.impl.DefaultFunctionInterpreter

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
  /*
   * Test method for 'ca.nengo.math.impl.DefaultFunctionInterpreter.registerFunction(String, Function)'
   */
  public void testRegisterFunction() {
    Function c = new ConstantFunction(2, 1f);
    DefaultFunctionInterpreter interpreter = new DefaultFunctionInterpreter();
    interpreter.registerFunction("const", c);
    PostfixFunction f = (PostfixFunction) interpreter.parse("const(x0, x1)", 2);
    List<Serializable> l = f.getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(c, l.get(2));
   
    try {
      interpreter.registerFunction("const", new ConstantFunction(1, 1f));
      fail("Should have thrown exception due to duplicate name");     
    } catch (Exception e) {} //exception is expected
  }
View Full Code Here
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
  /*
   * Test method for 'ca.nengo.math.impl.DefaultFunctionInterpreter.parse(String, int)'
   */
  public void testParse() {
    float tolerance = .0001f;
    DefaultFunctionInterpreter interpreter = new DefaultFunctionInterpreter();
    Function f = null;
    List<Serializable> l = null;
   
    // basic binary cases ...
    f = interpreter.parse("x0 + x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("+", l.get(2).toString());
    TestUtil.assertClose(2f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 - x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("-", l.get(2).toString());
    TestUtil.assertClose(0f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 * x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("*", l.get(2).toString());
    TestUtil.assertClose(1f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 / x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("/", l.get(2).toString());
    TestUtil.assertClose(.5f, f.map(new float[]{1f, 2f}), tolerance);
   
    f = interpreter.parse("x0 ^ x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("^", l.get(2).toString());
    TestUtil.assertClose(4f, f.map(new float[]{2f, 2f}), tolerance);
   
    f = interpreter.parse("x0 < x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("<", l.get(2).toString());
    TestUtil.assertClose(1f, f.map(new float[]{0f, 1f}), tolerance);
    TestUtil.assertClose(0f, f.map(new float[]{1f, 0f}), tolerance);
   
    f = interpreter.parse("x0 > x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(">", l.get(2).toString());
    TestUtil.assertClose(0f, f.map(new float[]{0f, 1f}), tolerance);
    TestUtil.assertClose(1f, f.map(new float[]{1f, 0f}), tolerance);
   
    f = interpreter.parse("x0 & x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("&", l.get(2).toString());
    TestUtil.assertClose(1f, f.map(new float[]{1f, 1f}), tolerance);
    TestUtil.assertClose(0f, f.map(new float[]{0f, 1f}), tolerance);
   
    f = interpreter.parse("x0 | x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("|", l.get(2).toString());
    TestUtil.assertClose(0f, f.map(new float[]{0f, 0f}), tolerance);
    TestUtil.assertClose(1f, f.map(new float[]{0f, 1f}), tolerance);
   
    f = interpreter.parse("x0|x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("|", l.get(2).toString());
   
    f = interpreter.parse("x0| x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("|", l.get(2).toString());
   
    f = interpreter.parse("x0 |x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("|", l.get(2).toString());
   
    f = interpreter.parse("x0 % x1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("%", l.get(2).toString());
    TestUtil.assertClose(0f, f.map(new float[]{10f, 2f}), tolerance);
    TestUtil.assertClose(1f, f.map(new float[]{10f, 3f}), tolerance);
   
    // basic unary cases ... 
    f = interpreter.parse("x0", 1);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    TestUtil.assertClose(1f, f.map(new float[]{1f}), tolerance);
   
    f = interpreter.parse("-x0", 1);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals("~", l.get(1).toString());
    TestUtil.assertClose(-1f, f.map(new float[]{1f}), tolerance);
   
    f = interpreter.parse("!x0", 1);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals("!", l.get(1).toString());
    TestUtil.assertClose(0f, f.map(new float[]{1f}), tolerance);
    TestUtil.assertClose(1f, f.map(new float[]{0f}), tolerance);
   
    f = interpreter.parse("! x0", 1);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals("!", l.get(1).toString());
   
    //precedence ...
    f = interpreter.parse("x0 + x1 + x2", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("+", l.get(2).toString());
    assertEquals(Integer.valueOf(2), l.get(3));
    assertEquals("+", l.get(4).toString());
    TestUtil.assertClose(6f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("x0 * x1 + x2", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("*", l.get(2).toString());
    assertEquals(Integer.valueOf(2), l.get(3));
    assertEquals("+", l.get(4).toString());
    TestUtil.assertClose(5f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("x0 / x1 - x2", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("/", l.get(2).toString());
    assertEquals(Integer.valueOf(2), l.get(3));
    assertEquals("-", l.get(4).toString());
    TestUtil.assertClose(-2.5f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("x0 + x1 * x2", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals("*", l.get(3).toString());
    assertEquals("+", l.get(4).toString());
    TestUtil.assertClose(7f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("x0 + x1 * -x2", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals("~", l.get(3).toString());
    assertEquals("*", l.get(4).toString());
    assertEquals("+", l.get(5).toString());
    TestUtil.assertClose(-5f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("x0 * x1 ^ x2", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals("^", l.get(3).toString());
    assertEquals("*", l.get(4).toString());
    TestUtil.assertClose(8f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("x0 * x1 ^ x2 & x3", 4);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals("^", l.get(3).toString());
    assertEquals("*", l.get(4).toString());
    assertEquals(Integer.valueOf(3), l.get(5));
    assertEquals("&", l.get(6).toString());
    TestUtil.assertClose(1f, f.map(new float[]{1f, 2f, 3f, 1f}), tolerance);
   
    //brackets ...
    f = interpreter.parse("x0 * (x1 + x2)", 3);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals("+", l.get(3).toString());
    assertEquals("*", l.get(4).toString());
    TestUtil.assertClose(5f, f.map(new float[]{1f, 2f, 3f}), tolerance);
   
    f = interpreter.parse("(x0 * x1) ^ (x2 & x3)", 4);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals("*", l.get(2).toString());
    assertEquals(Integer.valueOf(2), l.get(3));
    assertEquals(Integer.valueOf(3), l.get(4));
    assertEquals("&", l.get(5).toString());
    assertEquals("^", l.get(6).toString());
    TestUtil.assertClose(2f, f.map(new float[]{1f, 2f, 3f, 4f}), tolerance);
   
    f = interpreter.parse("x0 ^ (x1 * (x2 + x3))", 4);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals(Integer.valueOf(3), l.get(3));
    assertEquals("+", l.get(4).toString());
    assertEquals("*", l.get(5).toString());
    assertEquals("^", l.get(6).toString());
    TestUtil.assertClose(16384f, f.map(new float[]{2f, 2f, 3f, 4f}), tolerance);
   
    //functions ...
    f = interpreter.parse("x0 + sin(x1)", 4);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertTrue(l.get(2) instanceof SimpleFunctions.Sin);
    assertEquals("+", l.get(3).toString());
    TestUtil.assertClose(2f, f.map(new float[]{2f, (float) Math.PI, 1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 + sin(x1 + x2)", 4);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertEquals(Integer.valueOf(1), l.get(1));
    assertEquals(Integer.valueOf(2), l.get(2));
    assertEquals("+", l.get(3).toString());
    assertTrue(l.get(4) instanceof SimpleFunctions.Sin);
    assertEquals("+", l.get(5).toString());
    TestUtil.assertClose(2f, f.map(new float[]{2f, (float) Math.PI / 2f, (float) Math.PI / 2f, 1f}), tolerance);
   
    //constants ...
    f = interpreter.parse("1.1", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertTrue(l.get(0) instanceof Float);
    TestUtil.assertClose(1.1f, ((Float) l.get(0)).floatValue(), .0001f);
    TestUtil.assertClose(1.1f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 + 5", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertTrue(l.get(1) instanceof Float);
    TestUtil.assertClose(5f, ((Float) l.get(1)).floatValue(), .0001f);
    assertEquals("+", l.get(2).toString());
    TestUtil.assertClose(6f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 + 1.5", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertTrue(l.get(1) instanceof Float);
    TestUtil.assertClose(1.5f, ((Float) l.get(1)).floatValue(), .0001f);
    assertEquals("+", l.get(2).toString());
    TestUtil.assertClose(2.5f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 + 0.5", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertTrue(l.get(1) instanceof Float);
    TestUtil.assertClose(0.5f, ((Float) l.get(1)).floatValue(), .0001f);
    assertEquals("+", l.get(2).toString());
    TestUtil.assertClose(1.5f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 + .5", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertTrue(l.get(1) instanceof Float);
    TestUtil.assertClose(0.5f, ((Float) l.get(1)).floatValue(), .0001f);
    assertEquals("+", l.get(2).toString());
    TestUtil.assertClose(1.5f, f.map(new float[]{1f, 1f}), tolerance);
   
    f = interpreter.parse("x0 + pi", 2);
    l = ((PostfixFunction) f).getExpressionList();
    assertEquals(Integer.valueOf(0), l.get(0));
    assertTrue(l.get(1) instanceof Float);
    TestUtil.assertClose((float) Math.PI, ((Float) l.get(1)).floatValue(), .0001f);
    assertEquals("+", l.get(2).toString());
    TestUtil.assertClose(1f + (float) Math.PI, f.map(new float[]{1f, 1f}), tolerance);

    //dimension ...
    f = interpreter.parse("x0", 5);
    assertEquals(5, f.getDimension());

    //don't need this -- dimension is now adjusted to suit expression
//    try {
//      interpreter.parse("x5", 1);
//      fail("Should have thrown exception due to index higher than dimension");
//    } catch (Exception e) {} //exception is expected
   
    //everything ...
    f = interpreter.parse("2*pi + .5*x0 / sin((x1 + x2)^x3)", 4);
    l = ((PostfixFunction) f).getExpressionList();
    assertTrue(l.get(0) instanceof Float);
    TestUtil.assertClose(2f, ((Float) l.get(0)).floatValue(), .0001f);
    assertTrue(l.get(1) instanceof Float);
    TestUtil.assertClose((float) Math.PI, ((Float) l.get(1)).floatValue(), .0001f);
View Full Code Here
88
89
90
91
92
93
94
95
96
97
98
        //calculates the difference between subunit high and low
        //while this is done in the IndicatorPDF class, the difference cannot be accessed
        mySubDifference = dendriteRange.getHigh() - dendriteRange.getLow();

        myRange = new float[this.size][1];
        interpreter = new DefaultFunctionInterpreter();

        //if a function string is sent in, connections will be made from a function computing origin to the soma

        //By default, dendrites are always set to rate mode
        //However, the user can specify whether or not to change these to fire in spiking mode
View Full Code Here
254
255
256
257
258
259
260
261
262
263
264
     * Creates an origin at the dendrite level with a user specified function
     * The value calculated at the dendrites is then transferred to the soma ensemble
     * @throws StructuralException if decoded origin already exists
     */
    public void createFunctionOriginDendrites() throws StructuralException {
        this.interpreter = new DefaultFunctionInterpreter();

        int i = 0;
        Function[] f = new Function[1];
        f[0] = this.interpreter.parse(this.myDendriteFunction, this.dim);
        this.myConnectedOrigin = "function"; //changes connected origin name to be the newly created origin as opposed to X
View Full Code Here
58
59
60
61
62
63
64
65
66
67
68
69
70
   
    Simulator simulator = net.getSimulator();
    // Rules:
    // 1) if A and (B or C) then 1
    // 2) if D then 2
    FunctionInterpreter fi = new DefaultFunctionInterpreter();

    Function[] functions = new Function[] { fi.parse("x0 < .2", 1),
        new ConstantFunction(1, .5f), new ConstantFunction(1, .2f),
        new ConstantFunction(1, .3f) };
    FunctionInput in = new FunctionInput("input", functions, Units.UNK);

    NEFEnsembleFactory ef = new NEFEnsembleFactoryImpl();
View Full Code Here
TOP

Related Classes of ca.nengo.math.impl.DefaultFunctionInterpreter

  • ca.nengo.math.impl.DefaultFunctionInterpreterTest
  • ca.nengo.model.neuron.impl.PyramidalNetwork
  • ca.nengo.ui.dev.FuzzyLogicExample
  • java.util.StringTokenizer
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.