protected void assertGradient(ParameterLimitsTransform transform, double modelParam) {
double eps = 1e-5;
double g = transform.transformGradient(modelParam);
double fdg;
try {
double down = transform.transform(modelParam - eps);
double up = transform.transform(modelParam + eps);
fdg = (up - down) / 2 / eps;
} catch (IllegalArgumentException e) {
double fp = transform.transform(modelParam);
try {
double up = transform.transform(modelParam + eps);
fdg = (up - fp) / eps;
} catch (IllegalArgumentException e2) {
double down = transform.transform(modelParam - eps);
fdg = (fp - down) / eps;
}
}
assertEquals(g, fdg, 1e-6);
}
@Test(expectedExceptions = IllegalArgumentException.class)
public void testOutOfRange2() {
RANGE_LIMITS.transform(1.01);
}
// reverse
protected void assertReverseRoundTrip(ParameterLimitsTransform transform, double fitParam) {
double mp = transform.inverseTransform(fitParam);
double fp = transform.transform(mp);
assertEquals(fitParam, fp, 1e-8);
}
protected void assertGradientRoundTrip(ParameterLimitsTransform transform, double modelParam) {
double g = transform.transformGradient(modelParam);
double fp = transform.transform(modelParam);
double gInv = transform.inverseTransformGradient(fp);
assertEquals(g, 1.0 / gInv, 1e-8);
}
protected void assertRoundTrip(ParameterLimitsTransform transform, double modelParam) {
double fp = transform.transform(modelParam);
double mp = transform.inverseTransform(fp);
assertEquals(modelParam, mp, 1e-8);
}
