protected void assertInverseGradient(ParameterLimitsTransform transform, double fitParam) {
double eps = 1e-5;
double g = transform.inverseTransformGradient(fitParam);
double fdg;
double down = transform.inverseTransform(fitParam - eps);
double up = transform.inverseTransform(fitParam + eps);
fdg = (up - down) / 2 / eps;
assertEquals(g, fdg, 1e-6);
}
// 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 assertRoundTrip(ParameterLimitsTransform transform, double modelParam) {
double fp = transform.transform(modelParam);
double mp = transform.inverseTransform(fp);
assertEquals(modelParam, mp, 1e-8);
}