Package org.hipparchus.transform
Interface RealTransformer
- All Known Implementing Classes:
FastCosineTransformer
,FastHadamardTransformer
,FastSineTransformer
public interface RealTransformer
Interface for one-dimensional data sets transformations producing real results.
Such transforms include sine transform
,
cosine transform
or Hadamard transform
. Fourier transform
is of a different kind and does not implement this
interface since it produces Complex
results instead of real ones.
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Method Summary
Modifier and TypeMethodDescriptiondouble[]
transform
(double[] f, TransformType type) Returns the (forward, inverse) transform of the specified real data set.double[]
transform
(UnivariateFunction f, double min, double max, int n, TransformType type) Returns the (forward, inverse) transform of the specified real function, sampled on the specified interval.
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Method Details
-
transform
Returns the (forward, inverse) transform of the specified real data set.- Parameters:
f
- the real data array to be transformed (signal)type
- the type of transform (forward, inverse) to be performed- Returns:
- the real transformed array (spectrum)
- Throws:
MathIllegalArgumentException
- if the array cannot be transformed with the given type (this may be for example due to array size, which is constrained in some transforms)
-
transform
double[] transform(UnivariateFunction f, double min, double max, int n, TransformType type) throws MathIllegalArgumentException Returns the (forward, inverse) transform of the specified real function, sampled on the specified interval.- Parameters:
f
- the function to be sampled and transformedmin
- the (inclusive) lower bound for the intervalmax
- the (exclusive) upper bound for the intervaln
- the number of sample pointstype
- the type of transform (forward, inverse) to be performed- Returns:
- the real transformed array
- Throws:
MathIllegalArgumentException
- if the lower bound is greater than, or equal to the upper boundMathIllegalArgumentException
- if the number of sample points is negativeMathIllegalArgumentException
- if the sample cannot be transformed with the given type (this may be for example due to sample size, which is constrained in some transforms)
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