Found 10476 Articles for Python

Compute the multiplicative inverse of a matrix object with matrix() in Python

AmitDiwan
Updated on 25-Feb-2022 07:41:07

352 Views

To compute the multiplicative inverse of a matrix object with matrix(), use the numpy.linalg.inv() method in Python. Given a square matrix a, return the matrix ainv satisfying dot(a, ainv) = dot(ainv, a) = eye(a.shape[0]).The method returns (Multiplicative) inverse of the matrix a. The 1st parameter, a is a Matrix to be inverted.StepsAt first, import the required libraries-import numpy as np from numpy.linalg import invCreate an array −arr = np.array([[ 5, 10], [ 15, 20 ]])Display the array −print("Our Array...", arr)Check the Dimensions −print("Dimensions of our Array...", arr.ndim) Get the Datatype −print("Datatype of our Array object...", arr.dtype)Get the Shape −print("Shape of ... Read More

Compute the Moore-Penrose pseudoinverse of a stack of matrices in Python

AmitDiwan
Updated on 25-Feb-2022 07:19:18

413 Views

To Compute the (Moore-Penrose) pseudo-inverse of a stack of matrices, use the numpy.linalg.pinv() method in Python. Calculate the generalized inverse of a matrix using its singular-value decomposition (SVD) and including all large singular values.The 1st parameter, a is a Matrix or stack of matrices to be pseudo-inverted. The 2nd parameter, rcodn is cutoff for small singular values. Singular values less than or equal to rcond * largest_singular_value is set to zero. Broadcasts against the stack of matrices. The 3rd parameter, hermitian, if True, a is assumed to be Hermitian, enabling a more efficient method for finding singular values. Defaults to ... Read More

Return the element-wise square of the array input in Python

AmitDiwan
Updated on 25-Feb-2022 07:16:38

5K+ Views

To return the element-wise square of the array input, use the numpy.square() method in Python. The method returns the element-wise x*x, of the same shape and dtype as x. This is a scalar if x is a scalar.The 1st parameter, x is the input data. The 2nd parameter, out is a location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.The 3rd parameter, where, ... Read More

Compute the Moore-Penrose pseudoinverse of a matrix in Python

AmitDiwan
Updated on 25-Feb-2022 07:13:16

3K+ Views

To Compute the (Moore-Penrose) pseudo-inverse of a matrix, use the numpy.linalg.pinv() method in Python. Calculate the generalized inverse of a matrix using its singular-value decomposition (SVD) and including all large singular values.The 1st parameter, a is a Matrix or stack of matrices to be pseudo-inverted. The 2nd parameter, rcodn is cutoff for small singular values. Singular values less than or equal to rcond * largest_singular_value is set to zero. Broadcasts against the stack of matrices. The 3rd parameter, hermitian, if True, a is assumed to be Hermitian, enabling a more efficient method for finding singular values. Defaults to False.StepsAt first, ... Read More

Compute the multiplicative inverse of more than one matrix at once in Python

AmitDiwan
Updated on 25-Feb-2022 07:10:47

183 Views

To compute the (multiplicative) inverse of a matrix, use the numpy.linalg.inv() method in Python. Given a square matrix a, return the matrix ainv satisfying dot(a, ainv) = dot(ainv, a) = eye(a.shape[0]). The method returns (Multiplicative) inverse of the matrix a. The 1st parameter, a is a Matrix to be inverted.StepsAt first, import the required libraries-import numpy as np from numpy.linalg import invCreate several matrices using array() −arr = np.array([[[1., 2.], [3., 4.]], [[1, 3], [3, 5]]])Display the array −print("Our Array...", arr)Check the Dimensions −print("Dimensions of our Array...", arr.ndim) Get the Datatype −print("Datatype of our Array object...", arr.dtype)Get the Shape −print("Shape ... Read More

Get the Outer product of two arrays in Python

AmitDiwan
Updated on 25-Feb-2022 07:08:29

2K+ Views

To get the Outer product of two arrays, use the numpy.outer() method in Python. The 1st parameter a is the first input vector. Input is flattened if not already 1-dimensional. The 2nd parameter b is the second input vector. Input is flattened if not already 1-dimensional. The 3rd parameter out is a location where the result is stored.Given two vectors, a = [a0, a1, ..., aM] and b = [b0, b1, ..., bN], the outer product [1] is −[[a0*b0 a0*b1 ... a0*bN ] [a1*b0 . [ ... . [aM*b0 aM*bN ]]StepsAt first, import the required libraries-import numpy as npCreating two ... Read More

Get the Inner product of an array and a scalar in Python

AmitDiwan
Updated on 25-Feb-2022 07:06:22

222 Views

To get the Inner product of an array and a scalar, use the numpy.inner() method in Python. Ordinary inner product of vectors for 1-D arrays, in higher dimensions a sum product over the last axes. The parameters are 1 and b, two vectors. If a and b are nonscalar, their last dimensions must match.StepsAt first, import the required libraries-import numpy as npCreate an array using numpy.eye(). This method returns a 2-D array with ones on the diagonal and zeros elsewhere −arr = np.eye(5)The val is the scalar −val = 2Check the datatype −print("Datatype of Array...", arr.dtype) Check the Dimension −print("Dimensions ... Read More

Compute the multiplicative inverse of a matrix in Python

AmitDiwan
Updated on 25-Feb-2022 07:02:16

2K+ Views

To compute the (multiplicative) inverse of a matrix, use the numpy.linalg.inv() method in Python. Given a square matrix a, return the matrix ainv satisfying dot(a, ainv) = dot(ainv, a) = eye(a.shape[0]). The method returns (Multiplicative) inverse of the matrix a. The 1st parameter, a is a Matrix to be inverted.StepsAt first, import the required libraries-import numpy as np from numpy.linalg import invCreate an array −arr = np.array([[ 5, 10], [ 15, 20 ]])Display the array −print("Our Array...", arr)Check the Dimensions −print("Dimensions of our Array...", arr.ndim)Get the Datatype −print("Datatype of our Array object...", arr.dtype)Get the Shape −print("Shape of our Array object...", ... Read More

Solve the tensor equation in Python

AmitDiwan
Updated on 25-Feb-2022 06:55:20

734 Views

To solve the tensor equation, use the numpy.linalg.tensorsolve() method in Python. It is assumed that all indices of x are summed over in the product, together with the rightmost indices of a, as is done in, for example, tensordot(a, x, axes=b.ndim).The 1st parameter, a is a coefficient tensor, of shape b.shape + Q. Q, a tuple, equals the shape of that sub-tensor of a consisting of the appropriate number of its rightmost indices, and must be such that prod(Q) == prod(b.shape). The 2nd parameter, b is a right-hand tensor, which can be of any shape. The 3rd parameter, axis is ... Read More

Replace infinity with large finite numbers but fill NaN values in Python

AmitDiwan
Updated on 25-Feb-2022 06:53:13

1K+ Views

To replace NaN with zero and infinity with large finite numbers, use the numpy.nan_to_num() method in Python. The method returns, x, with the non-finite values replaced. If copy is False, this may be x itself. The 1st parameter is the input data. The 2nd parameter is copy, whether to create a copy of x (True) or to replace values in-place (False). The in-place operation only occurs if casting to an array does not require a copy. Default is True.The 3rd parameter is nan, the value to be used to fill NaN values. If no value is passed then NaN values ... Read More

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