» Home » Matrix » Page 1
matrix assignment from a matrix A to a matrix B using conditional statements based on a third matrix C
Category : Programming Languages

I have two questions if you can kindly respond:


Q1) I have a matrix choice, where each person is making 4 of any possible choices, denoted as 1, 2, 3 and 4.
I have three matrixes A1, A2, A3 with income information for each person and each time period. Say I have n people and t time periods so A1, A2,


View Replies


Is there any built-in type of matrix in CUDA for matrix and matrix-vector operation?
Category : Programming Languages

I want to implement some matrix–vector math. There are vector types like: float2, int2, but I cannot find any built-in type matrix in CUDA.


Is there a library that suitable for such operations?


View Replies


Based on a matrix A, generate a matrix B with all possible multiplications of the columns of Matrix A
Category : Programming Languages

Say I have a matrix with 3 columns: c1, c2,c3, and I want to create a new matrix in which each column is any possible product of two of the columns of this matrix.


So, if I had a matrix with d columns, I would like to create a new matrix with d+d(d-1)/2+d columns. For example, consider the matrix with 3 columns c1, c2


View Replies


Replace matrix values in a matrix with mean values extracted from a smaler matrix in matlab
Category : Programming Languages

Lets say I have an 10 x 10 matrix. What I do then is iterate throug the whole matrix with an 3x3 matrix (except the edges to make it easier), and from this 3x3 matrix I get the mean/average value of this 3x3 space. What I then want to do is to replace the orignal matrix values, with those new mean/average values. can someone please explaine to me how I can do that? Some code examples would be a


View Replies


Accessing a matrix element by matrix[(a, b), c] instead of matrix[a, b, c]
Category : Programming Languages

I want to achieve the following:


Have a AxBxC matrix (where A,B,C are
integers).
Access that matrix not as matrix[a,
b, c] but as matrix[(a, b), c], this
is, I have two variables, var1 = (x,
y) and var2 = z and want access my
matrix as matrix[var1, var2].

How can this be done? I am using numpy matrix, if it makes any difference.


I know


View Replies


How to store Sparse matrix for a matrix-vector multiply when some boundary condition values are known?
Category : Programming Languages

I have a sparse matrix that represents a 3D rectangular space. Along some of the boundaries, I know what the value is going to be (it's a constant). The other boundaries may be reflective, differential, etc.


Should I just set the problem up as if all the boundaries were say, differential, and then go back and set the nodes in the solution vector b to be the constants?


T


View Replies


Load sparse scipy matrix into existing numpy dense matrix
Category : Programming Languages

Say I have a huge numpy matrix A taking up tens of gigabytes. It takes a non-negligible amount of time to allocate this memory.


Let's say I also have a collection of scipy sparse matrices with the same dimensions as the numpy matrix. Sometimes I want to convert one of these sparse matrices into a dense matrix to perform some vectorized operations.


Can I load one of the


View Replies


R or MATLAB: permute a large sparse matrix into a block diagonal matrix
Category : Programming Languages

I have a large sparse matrix, and I want to permute its rows or columns to turn the original matrix into a block diagonal matrix. Anyone knows which functions in R or MATLAB can do this? Thanks a lot.


View Replies


Make TikZ matrix[matrix of math nodes] use cartesian coordinates?
Category : Coding

No matter how hard I try, I can't get it out of my head that (0,0) is the lower left corner and the first coordinate is the horizontal position.


Unfortunately TikZ/PGF's wonderful "matrix (m) [matrix of math nodes]..." automatically assigns names (like m-3-2) whose first coordinate is the vertical position, and puts (1,1) at the upper left corner. Trying to work this way is making


View Replies


Java. Writing a matrix in a file using column information. ( matrix transposition )
Category : Programming Languages

I have a file in which a matrix is stored. This file has a RandomAccessFile type. This matrix is stored by columns. I mean that in an i-th row of this matrix an i-th column (of a real matrix) is stored. There is an example:
i-th row: 1 2 3 4 (in the file). That means that the real matrix has an i-th column: (1 2 3 4)(is transposed).


I need to save this matrix in a natural way (


View Replies


Next
2012 / 2017 Copyrights BigHow , All Rights Reserved .