# Uses of Class
org.apache.commons.math3.complex.Complex

Packages that use Complex
Package
Description
org.apache.commons.math3.analysis.solvers
Root finding algorithms, for univariate real functions.
org.apache.commons.math3.complex
Complex number type and implementations of complex transcendental functions.
org.apache.commons.math3.transform
Implementations of transform methods, including Fast Fourier transforms.

## Uses of Complex in org.apache.commons.math3.analysis.solvers

Methods in org.apache.commons.math3.analysis.solvers that return Complex
Modifier and Type
Method
Description
`Complex[]`
LaguerreSolver.`solveAllComplex(double[] coefficients, double initial)`
Find all complex roots for the polynomial with the given coefficients, starting from the given initial value.
`Complex[]`
LaguerreSolver.`solveAllComplex(double[] coefficients, double initial, int maxEval)`
Find all complex roots for the polynomial with the given coefficients, starting from the given initial value.
`Complex`
LaguerreSolver.`solveComplex(double[] coefficients, double initial)`
Find a complex root for the polynomial with the given coefficients, starting from the given initial value.
`Complex`
LaguerreSolver.`solveComplex(double[] coefficients, double initial, int maxEval)`
Find a complex root for the polynomial with the given coefficients, starting from the given initial value.

## Uses of Complex in org.apache.commons.math3.complex

Fields in org.apache.commons.math3.complex declared as Complex
Modifier and Type
Field
Description
`static final Complex`
Complex.`I`
The square root of -1.
`static final Complex`
Complex.`INF`
A complex number representing "+INF + INFi"
`static final Complex`
Complex.`NaN`
A complex number representing "NaN + NaNi"
`static final Complex`
Complex.`ONE`
A complex number representing "1.0 + 0.0i"
`static final Complex`
Complex.`ZERO`
A complex number representing "0.0 + 0.0i"
Methods in org.apache.commons.math3.complex that return Complex
Modifier and Type
Method
Description
`Complex`
Complex.`acos()`
Compute the inverse cosine of this complex number.
`Complex`
Complex.`add(double addend)`
Returns a `Complex` whose value is `(this + addend)`, with `addend` interpreted as a real number.
`Complex`
Complex.`add(Complex addend)`
Returns a `Complex` whose value is `(this + addend)`.
`Complex`
Complex.`asin()`
Compute the inverse sine of this complex number.
`Complex`
Complex.`atan()`
Compute the inverse tangent of this complex number.
`Complex`
Complex.`conjugate()`
Returns the conjugate of this complex number.
`static Complex[]`
ComplexUtils.`convertToComplex(double[] real)`
Convert an array of primitive doubles to an array of `Complex` objects.
`Complex`
Complex.`cos()`
Compute the cosine of this complex number.
`Complex`
Complex.`cosh()`
Compute the hyperbolic cosine of this complex number.
`protected Complex`
Complex.`createComplex(double realPart, double imaginaryPart)`
Create a complex number given the real and imaginary parts.
`Complex`
Complex.`divide(double divisor)`
Returns a `Complex` whose value is `(this / divisor)`, with `divisor` interpreted as a real number.
`Complex`
Complex.`divide(Complex divisor)`
Returns a `Complex` whose value is `(this / divisor)`.
`Complex`
Complex.`exp()`
Compute the exponential function of this complex number.
`Complex`
ComplexField.`getOne()`
Get the multiplicative identity of the field.
`Complex`
ComplexField.`getZero()`
Get the additive identity of the field.
`Complex`
Complex.`log()`
Compute the natural logarithm of this complex number.
`Complex`
Complex.`multiply(double factor)`
Returns a `Complex` whose value is `this * factor`, with `factor` interpreted as a real number.
`Complex`
Complex.`multiply(int factor)`
Returns a `Complex` whose value is `this * factor`, with `factor` interpreted as a integer number.
`Complex`
Complex.`multiply(Complex factor)`
Returns a `Complex` whose value is `this * factor`.
`Complex`
Complex.`negate()`
Returns a `Complex` whose value is `(-this)`.
`Complex`
ComplexFormat.`parse(String source)`
Parses a string to produce a `Complex` object.
`Complex`
ComplexFormat.`parse(String source, ParsePosition pos)`
Parses a string to produce a `Complex` object.
`static Complex`
ComplexUtils.`polar2Complex(double r, double theta)`
Creates a complex number from the given polar representation.
`Complex`
Complex.`pow(double x)`
Returns of value of this complex number raised to the power of `x`.
`Complex`
Complex.`pow(Complex x)`
Returns of value of this complex number raised to the power of `x`.
`Complex`
Complex.`reciprocal()`
Returns the multiplicative inverse of `this` element.
`Complex`
Complex.`sin()`
Compute the sine of this complex number.
`Complex`
Complex.`sinh()`
Compute the hyperbolic sine of this complex number.
`Complex`
Complex.`sqrt()`
Compute the square root of this complex number.
`Complex`
Complex.`sqrt1z()`
Compute the square root of `1 - this2` for this complex number.
`Complex`
Complex.`subtract(double subtrahend)`
Returns a `Complex` whose value is `(this - subtrahend)`.
`Complex`
Complex.`subtract(Complex subtrahend)`
Returns a `Complex` whose value is `(this - subtrahend)`.
`Complex`
Complex.`tan()`
Compute the tangent of this complex number.
`Complex`
Complex.`tanh()`
Compute the hyperbolic tangent of this complex number.
`static Complex`
Complex.`valueOf(double realPart)`
Create a complex number given only the real part.
`static Complex`
Complex.`valueOf(double realPart, double imaginaryPart)`
Create a complex number given the real and imaginary parts.
Methods in org.apache.commons.math3.complex that return types with arguments of type Complex
Modifier and Type
Method
Description
`Class<? extends FieldElement<Complex>>`
ComplexField.`getRuntimeClass()`
Returns the runtime class of the FieldElement.
`List<Complex>`
Complex.`nthRoot(int n)`
Computes the n-th roots of this complex number.
Methods in org.apache.commons.math3.complex with parameters of type Complex
Modifier and Type
Method
Description
`Complex`
Complex.`add(Complex addend)`
Returns a `Complex` whose value is `(this + addend)`.
`Complex`
Complex.`divide(Complex divisor)`
Returns a `Complex` whose value is `(this / divisor)`.
`static boolean`
Complex.`equals(Complex x, Complex y)`
Returns `true` iff the values are equal as defined by `equals(x, y, 1)`.
`static boolean`
Complex.`equals(Complex x, Complex y, double eps)`
Returns `true` if, both for the real part and for the imaginary part, there is no double value strictly between the arguments or the difference between them is within the range of allowed error (inclusive).
`static boolean`
Complex.`equals(Complex x, Complex y, int maxUlps)`
Test for the floating-point equality between Complex objects.
`static boolean`
Complex.`equalsWithRelativeTolerance(Complex x, Complex y, double eps)`
Returns `true` if, both for the real part and for the imaginary part, there is no double value strictly between the arguments or the relative difference between them is smaller or equal to the given tolerance.
`String`
ComplexFormat.`format(Complex c)`
This method calls `ComplexFormat.format(Object,StringBuffer,FieldPosition)`.
`StringBuffer`
ComplexFormat.`format(Complex complex, StringBuffer toAppendTo, FieldPosition pos)`
Formats a `Complex` object to produce a string.
`Complex`
Complex.`multiply(Complex factor)`
Returns a `Complex` whose value is `this * factor`.
`Complex`
Complex.`pow(Complex x)`
Returns of value of this complex number raised to the power of `x`.
`Complex`
Complex.`subtract(Complex subtrahend)`
Returns a `Complex` whose value is `(this - subtrahend)`.

## Uses of Complex in org.apache.commons.math3.transform

Methods in org.apache.commons.math3.transform that return Complex
Modifier and Type
Method
Description
`static Complex[]`
TransformUtils.`createComplexArray(double[][] dataRI)`
Builds a new array of `Complex` from the specified two dimensional array of real and imaginary parts.
`static Complex[]`
TransformUtils.`scaleArray(Complex[] f, double d)`
Multiply every component in the given complex array by the given real number.
`Complex[]`
FastFourierTransformer.`transform(double[] f, TransformType type)`
Returns the (forward, inverse) transform of the specified real data set.
`Complex[]`
FastFourierTransformer.`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.
`Complex[]`
FastFourierTransformer.`transform(Complex[] f, TransformType type)`
Returns the (forward, inverse) transform of the specified complex data set.
Methods in org.apache.commons.math3.transform with parameters of type Complex
Modifier and Type
Method
Description
`static double[][]`
TransformUtils.`createRealImaginaryArray(Complex[] dataC)`
Builds a new two dimensional array of `double` filled with the real and imaginary parts of the specified `Complex` numbers.
`static Complex[]`
TransformUtils.`scaleArray(Complex[] f, double d)`
Multiply every component in the given complex array by the given real number.
`Complex[]`
FastFourierTransformer.`transform(Complex[] f, TransformType type)`
Returns the (forward, inverse) transform of the specified complex data set.