You can try this code: public class MyMatrix { Double[][] A = { { 4.00, 3.00 }, { 2.00, 1.00 } }; Double[][] B = { { -0.500, 1.500 }, { 1.000, -2.0000 } }; public static Double[][] multiplicar(Double[][] A, Double[][] B) { int aRows = A.length; int aColumns = A[0].length; int bRows = B.length; … Read more
Some Java libraries for linear algebra are: Apache Commons Math: http://commons.apache.org/proper/commons-math/ jeigen – a wrapper for eigen – https://github.com/hughperkins/jeigen (includes complex and rarely found feature like matrix exponential and matrix logarithm) jblas http://mikiobraun.github.io/jblas/ (also features more complex functions like matrix exponential, also very fast). Colt http://acs.lbl.gov/software/colt/ JAMA http://math.nist.gov/javanumerics/jama/ UJMP – http://sourceforge.net/projects/ujmp/ EDIT maybe we can … Read more
Use numpy.concatenate: >>> import numpy as np >>> np.concatenate((A, B)) matrix([[ 1., 2.], [ 3., 4.], [ 5., 6.]])
The usual solution is (defn transpose [m] (apply mapv vector m))
Interactive selection in ggplotly with geom_hex() scatterplot
It seems that your implementation is correct so far. The issue is with how you are printing the local array for the first processor. The local array is formed column-wise because of how the file is being read and the data is distributed among the processes. To print the local array for the first processor … Read more
If you can use sympy, Matrix.rref() can do it: In [8]: sympy.Matrix(np.random.random((4,4))).rref() Out[8]: ([1, 1.42711055402454e-17, 0, -1.38777878078145e-17] [0, 1.0, 0, 2.22044604925031e-16] [0, -2.3388341405089e-16, 1, -2.22044604925031e-16] [0, 3.65674099486992e-17, 0, 1.0], [0, 1, 2, 3])
Here’s one way. I assume numpy has been imported using import numpy as np. In [20]: a Out[20]: array([[0, 1, 0], [1, 0, 1], [0, 0, 0], [1, 1, 0], [0, 0, 0]]) In [21]: np.where(~a.any(axis=1))[0] Out[21]: array([2, 4]) It’s a slight variation of this answer: How to check that a matrix contains a zero … Read more
Perhaps the following illustration showing the relationship between the various spaces will help: Depending if you’re using the fixed-function pipeline (you are if you call glMatrixMode(), for example), or using shaders, the operations are identical – it’s just a matter of whether you code them directly in a shader, or the OpenGL pipeline aids in … Read more