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Articles by AmitDiwan
Page 8 of 840
Compute the roots of a Hermite_e series with given complex roots in Python
To compute the roots of a Hermite_e series, use the hermite_e.hermeroots() method in Python NumPy. The method returns an array of the roots of the series. If all the roots are real, then output is also real, otherwise it is complex. The parameter c is a 1-D array of coefficients. The root estimates are obtained as the eigenvalues of the companion matrix. Roots far from the origin of the complex plane may have large errors due to the numerical instability of the series for such values. Roots with multiplicity greater than 1 will also show larger errors as the ...
Read MoreCompute the roots of a Hermite_e series in Python
To compute the roots of a Hermite_e series, use the hermeroots() method from NumPy's polynomial module. This method returns an array of the roots of the series. If all roots are real, the output is real; otherwise, it's complex. The parameter c is a 1-D array of coefficients representing the Hermite_e series. The root estimates are obtained as eigenvalues of the companion matrix. Roots far from the origin may have large errors due to numerical instability. Roots with multiplicity greater than 1 also show larger errors since the series value near such points is relatively insensitive to root errors. ...
Read MoreGenerate a Hermite_e series with given complex roots in Python
To generate a Hermite_e series with given complex roots, use the hermite_e.hermefromroots() method in Python NumPy. The method returns a 1-D array of coefficients representing the polynomial with the specified roots. If all roots are real, the output is a real array. If some roots are complex, the output is complex even if all coefficients in the result are real. The parameter roots accepts a sequence containing the desired roots. Syntax hermite_e.hermefromroots(roots) Parameters: roots − Sequence of roots to use in generating the series Returns: 1-D array of Hermite_e series coefficients ...
Read MoreIntegrate a Hermite_e series over axis 0 in Python
To integrate a Hermite_e series, use the hermite_e.hermeint() method in Python. This function performs integration along a specified axis of multidimensional coefficient arrays representing Hermite_e series. Syntax numpy.polynomial.hermite_e.hermeint(c, m=1, k=[], lbnd=0, scl=1, axis=0) Parameters The function accepts the following parameters ? c − Array of Hermite_e series coefficients. If multidimensional, different axes correspond to different variables m − Order of integration (must be positive, default: 1) k − Integration constant(s). Default is empty list (all constants set to zero) lbnd − Lower bound of the integral (default: 0) scl − Scalar multiplier ...
Read MoreIntegrate a Hermite_e series over axis 1 in Python
To integrate a Hermite_e series over a specific axis, use the hermite_e.hermeint() method in Python. This function integrates Hermite_e polynomial coefficients and can work with multidimensional arrays where different axes correspond to different variables. Syntax hermite_e.hermeint(c, m=1, k=[], lbnd=0, scl=1, axis=0) Parameters The function accepts the following parameters: c − Array of Hermite_e series coefficients m − Order of integration (default: 1) k − Integration constant(s) (default: []) lbnd − Lower bound of the integral (default: 0) scl − Scalar multiplier (default: 1) axis − Axis over which integration is performed ...
Read MoreGenerate a Pseudo Vandermonde matrix of the Hermite_e polynomial and x, y, z complex array of points in Python
To generate a pseudo Vandermonde matrix of the Hermite_e polynomial and x, y, z sample points, use the hermite_e.hermevander3d() in Python NumPy. This method returns the pseudo-Vandermonde matrix where the parameters x, y, z are arrays of point coordinates, all of the same shape. The dtypes will be converted to either float64 or complex128 depending on whether any of the elements are complex. Syntax numpy.polynomial.hermite_e.hermevander3d(x, y, z, deg) Parameters The function accepts the following parameters ? x, y, z ? Arrays of point coordinates, all of the same shape deg ? List ...
Read MoreIntegrate a Hermite_e series and set the Integration constant in Python
To integrate a Hermite_e series, use the hermite_e.hermeint() method in Python. This function integrates a Hermite_e polynomial and allows you to set integration constants. Syntax numpy.polynomial.hermite_e.hermeint(c, m=1, k=[], lbnd=0, scl=1, axis=0) Parameters c − Array of Hermite_e series coefficients m − Order of integration (default: 1) k − Integration constant(s). If k == [], all constants are zero (default: []) lbnd − Lower bound of integration (default: 0) scl − Scalar multiplier applied after each integration (default: 1) axis − Axis over which integration is performed (default: 0) Basic Integration ...
Read MoreIntegrate a Hermite_e series and set the order of integration in Python
To integrate a Hermite_e series, use the hermite_e.hermeint() method in Python. This function performs polynomial integration on Hermite_e series coefficients with customizable integration order and constants. Syntax numpy.polynomial.hermite_e.hermeint(c, m=1, k=[], lbnd=0, scl=1, axis=0) Parameters The function accepts the following parameters: c - Array of Hermite_e series coefficients m - Order of integration (must be positive, default: 1) k - Integration constant(s) (default: []) lbnd - Lower bound of the integral (default: 0) scl - Scalar multiplier applied after each integration (default: 1) axis - Axis over which the integral is taken (default: ...
Read MoreRemove small trailing coefficients from Legendre polynomial in Python
To remove small trailing coefficients from Legendre polynomial, use the legendre.legtrim() method in Python NumPy. The method returns a 1-d array with trailing zeros removed. If the resulting series would be empty, a series containing a single zero is returned. The small means "small in absolute value" and is controlled by the parameter tol. The trailing means highest order coefficient(s), e.g., in [0, 1, 1, 0, 0] (which represents 0 + x + x**2 + 0*x**3 + 0*x**4) both the 3rd and 4th order coefficients would be trimmed. Syntax numpy.polynomial.legendre.legtrim(c, tol=0) Parameters ...
Read MoreGet the Least squares fit of Legendre series to data in Python
To get the least squares fit of Legendre series to data, use the legendre.legfit() method in NumPy. The method returns the Legendre coefficients ordered from low to high. If y was 2-D, the coefficients for the data in column k of y are in column k. Syntax numpy.polynomial.legendre.legfit(x, y, deg, rcond=None, full=False, w=None) Parameters x − The x-coordinates of the M sample (data) points (x[i], y[i]). y − The y-coordinates of the sample points. Several sets of sample points sharing the same x-coordinates can be (independently) fit with one call to polyfit by ...
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