Python | Numpy np.lagvander2d() method Last Updated : 31 Dec, 2019 Comments Improve Suggest changes Like Article Like Report With the help of np.lagvander2d() method, we can get the Pseudo-Vandermonde matrix from given array having degree which is passed as parameter by using np.lagvander2d() method. Syntax : np.lagvander2d(x, y, deg) Parameters: x, y :[ array_like ] Array of points. The dtype is converted to float64 or complex128 depending on whether any of the elements are complex. If x is scalar it is converted to a 1-D array deg :[int] Degree of the resulting matrix. Return : Return the matrix having size i.e array.size + (degree + 1). Example #1 : In this example we can see that by using np.lagvander2d() method, we are able to get the pseudo-vandermonde matrix using this method. Python3 1=1 # import numpy import numpy as np import numpy.polynomial.laguerre as geek # using np.lagvander() method ans = geek.lagvander2d((1, 3, 5, 7), (2, 4, 6, 8), [2, 2]) print(ans) Output : [[ 1. -1. -1. 0. -0. -0. -0.5 0.5 0.5] [ 1. -3. 1. -2. 6. -2. -0.5 1.5 -0.5] [ 1. -5. 7. -4. 20. -28. 3.5 -17.5 24.5] [ 1. -7. 17. -6. 42. -102. 11.5 -80.5 195.5]] Example #2 : Python3 1=1 # import numpy import numpy as np import numpy.polynomial.laguerre as geek ans = geek.lagvander2d((1, 2, 3, 4), (5, 6, 7, 8), [3, 3]) print(ans) Output : [[ 1. -4. 3.5 2.66666667 0. -0. 0. 0. -0.5 2. -1.75 -1.33333333 -0.66666667 2.66666667 -2.33333333 -1.77777778] [ 1. -5. 7. 1. -1. 5. -7. -1. -1. 5. -7. -1. -0.33333333 1.66666667 -2.33333333 -0.33333333] [ 1. -6. 11.5 -3.66666667 -2. 12. -23. 7.33333333 -0.5 3. -5.75 1.83333333 1. -6. 11.5 -3.66666667] [ 1. -7. 17. -12.33333333 -3. 21. -51. 37. 1. -7. 17. -12.33333333 2.33333333 -16.33333333 39.66666667 -28.77777778]] Comment More infoAdvertise with us Next Article Python | Numpy np.lagvander2d() method jana_sayantan Follow Improve Article Tags : Python Python-numpy Python numpy-Mathematical Function Practice Tags : python Similar Reads Python | Numpy np.lagvander() method With the help of np.lagvander() method, we can get the Pseudo-Vandermonde matrix from given array having degree which is passed as parameter by using np.lagvander() method. Syntax : np.lagvander(arr, degree) Parameters: arr :[ array_like ] Array of points. The dtype is converted to float64 or comple 2 min read Python | Numpy np.lagvander3d() method np.lagvander3d() method is used to returns the Vandermonde matrix of degree deg and sample points x, y and z. Syntax : np.lagvander3d(x, y, z, deg) Parameters: x, y, z :[ array_like ] Array of points. The dtype is converted to float64 or complex128 depending on whether any of the elements are comple 2 min read Python | Numpy np.legvander2d() method With the help of np.legvander2d() method, we can get the Pseudo-Vandermonde matrix from given array having degree which is passed as parameter by using np.legvander2d() method. Syntax : np.legvander2d(x, y, deg) Parameters: x, y :[ array_like ] Array of points. The dtype is converted to float64 or c 2 min read Python | Numpy np.legvander() method np.legvander() method is used to returns the Vandermonde matrix of degree deg and sample points x. Syntax : np.legvander(x, deg) Parameters: x :[ array_like ] Array of points. The dtype is converted to float64 or complex128 depending on whether any of the elements are complex. If x is scalar it is c 1 min read Python | Numpy np.legvander3d() method np.legvander3d() method is used to returns the Vandermonde matrix of degree deg and sample points x, y and z. Syntax : np.legvander3d(x, y, z, deg) Parameters: x, y, z :[ array_like ] Array of points. The dtype is converted to float64 or complex128 depending on whether any of the elements are comple 2 min read Like