Java Code Examples for org.nd4j.autodiff.samediff.SameDiff#variance()
The following examples show how to use
org.nd4j.autodiff.samediff.SameDiff#variance() .
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Example 1
| Source File: GradCheckReductions.java From nd4j with Apache License 2.0 | 4 votes |
|
@Test
public void testReductionGradientsSimple() {
//Test reductions: final and only function
Nd4j.getRandom().setSeed(12345);
for (int i = 0; i < 12; i++) {
SameDiff sd = SameDiff.create();
boolean skipBackward = false;
int nOut = 4;
int minibatch = 10;
SDVariable input = sd.var("in", new int[]{-1, nOut});
SDVariable loss;
String name;
switch (i) {
case 0:
loss = sd.mean("loss", input);
name = "mean";
break;
case 1:
loss = sd.sum("loss", input);
name = "sum";
break;
case 2:
loss = sd.standardDeviation("loss", input, true);
name = "stdev";
break;
case 3:
loss = sd.min("loss", input);
name = "min";
break;
case 4:
loss = sd.max("loss", input);
name = "max";
break;
case 5:
loss = sd.variance("loss", input, true);
name = "variance";
break;
case 6:
loss = sd.prod("loss", input);
name = "prod";
break;
case 7:
loss = sd.norm1("loss", input);
name = "norm1";
break;
case 8:
loss = sd.norm2("loss", input);
name = "norm2";
break;
case 9:
loss = sd.normmax("loss", input);
name = "normmax";
break;
case 10:
loss = sd.countNonZero("loss", input);
name = "countNonZero";
skipBackward = true;
break;
case 11:
loss = sd.countZero("loss", input);
name = "countZero";
skipBackward = true;
break;
default:
throw new RuntimeException();
}
String msg = "test: " + i + " - " + name;
log.info("*** Starting test: " + msg);
INDArray inputArr = Nd4j.randn(minibatch, nOut).muli(100);
sd.associateArrayWithVariable(inputArr, input);
if (!skipBackward) {
boolean ok = GradCheckUtil.checkGradients(sd);
assertTrue(msg, ok);
}
}
}
Example 2
| Source File: GradCheckReductions.java From nd4j with Apache License 2.0 | 4 votes |
|
@Test
public void testReductionGradients1() {
//Test reductions: final, but *not* the only function
Nd4j.getRandom().setSeed(12345);
List<String> allFailed = new ArrayList<>();
for (int dim : new int[]{0, Integer.MAX_VALUE}) { //These two cases are equivalent here
for (int i = 0; i < 10; i++) {
SameDiff sd = SameDiff.create();
int nOut = 4;
int minibatch = 10;
SDVariable input = sd.var("in", new int[]{-1, nOut});
SDVariable label = sd.var("label", new int[]{-1, nOut});
SDVariable diff = input.sub(label);
SDVariable sqDiff = diff.mul(diff);
SDVariable msePerEx = sd.mean("msePerEx", sqDiff, 1);
SDVariable loss;
String name;
switch (i) {
case 0:
loss = sd.mean("loss", msePerEx, dim);
name = "mean";
break;
case 1:
loss = sd.sum("loss", msePerEx, dim);
name = "sum";
break;
case 2:
loss = sd.standardDeviation("loss", msePerEx, true, dim);
name = "stdev";
break;
case 3:
loss = sd.min("loss", msePerEx, dim);
name = "min";
break;
case 4:
loss = sd.max("loss", msePerEx, dim);
name = "max";
break;
case 5:
loss = sd.variance("loss", msePerEx, true, dim);
name = "variance";
break;
case 6:
loss = sd.prod("loss", msePerEx, dim);
name = "prod";
break;
case 7:
loss = sd.norm1("loss", msePerEx, dim);
name = "norm1";
break;
case 8:
loss = sd.norm2("loss", msePerEx, dim);
name = "norm2";
break;
case 9:
loss = sd.normmax("loss", msePerEx, dim);
name = "normmax";
break;
default:
throw new RuntimeException();
}
String msg = "(test " + i + " - " + name + ", dimension=" + dim + ")";
log.info("*** Starting test: " + msg);
INDArray inputArr = Nd4j.randn(minibatch, nOut).muli(100);
INDArray labelArr = Nd4j.randn(minibatch, nOut).muli(100);
sd.associateArrayWithVariable(inputArr, input);
sd.associateArrayWithVariable(labelArr, label);
try {
INDArray out = sd.execAndEndResult();
assertNotNull(out);
assertArrayEquals(new int[]{1, 1}, out.shape());
// System.out.println(sd.asFlatPrint());
boolean ok = GradCheckUtil.checkGradients(sd);
if (!ok) {
allFailed.add(msg);
}
} catch (Exception e) {
e.printStackTrace();
allFailed.add(msg + " - EXCEPTION");
}
}
}
assertEquals("Failed: " + allFailed, 0, allFailed.size());
}
Example 3
| Source File: ReductionOpValidation.java From deeplearning4j with Apache License 2.0 | 4 votes |
|
@Test
public void testReductionsBackwards() {
// for (int i = 0; i < 7; i++) {
int i=5;
{
SameDiff sd = SameDiff.create();
int nOut = 4;
int minibatch = 3;
SDVariable input = sd.var("in", DataType.DOUBLE, new long[]{minibatch, nOut});
SDVariable label = sd.var("label", DataType.DOUBLE, new long[]{minibatch, nOut});
SDVariable diff = input.sub(label);
SDVariable sqDiff = diff.mul(diff);
SDVariable msePerEx = sd.mean("msePerEx", sqDiff, 1);
SDVariable loss; //Scalar value
String name;
switch (i) {
case 0:
loss = sd.mean("loss", msePerEx, 0);
name = "mean";
break;
case 1:
loss = sd.sum("loss", msePerEx, 0);
name = "sum";
break;
case 2:
loss = sd.standardDeviation("loss", msePerEx, true, 0);
name = "stdev";
break;
case 3:
loss = sd.min("loss", msePerEx, 0);
name = "min";
break;
case 4:
loss = sd.max("loss", msePerEx, 0);
name = "max";
break;
case 5:
loss = sd.variance("loss", msePerEx, true, 0);
name = "variance";
break;
case 6:
loss = sd.prod("loss", msePerEx, 0);
name = "prod";
break;
default:
throw new RuntimeException();
}
String msg = "test: " + i + " - " + name;
log.info("*** Starting test: " + msg);
INDArray inputArr = Nd4j.rand(DataType.DOUBLE, minibatch, nOut);
INDArray labelArr = Nd4j.rand(DataType.DOUBLE, minibatch, nOut);
sd.associateArrayWithVariable(inputArr, input);
sd.associateArrayWithVariable(labelArr, label);
INDArray result = loss.eval();
assertEquals(1, result.length());
sd.calculateGradients(Collections.emptyMap(), sd.getVariables().keySet());
}
}
