Search results
10 paź 2009 · I'm trying to set up a zero matrix of variable length with two columns into which I can output the results of a while loop (with the intention of using it to store the step data from Euler's method with adjusted time-steps). The length will be determined by the number of iterations of the loop.
MATLAB has many functions that help create matrices with certain values or a particular structure. For example, the zeros and ones functions create matrices of all zeros or all ones.
The reshape function changes the size and shape of an array. For example, reshape a 3-by-4 matrix to a 2-by-6 matrix.
sz = size(A) returns a row vector whose elements are the lengths of the corresponding dimensions of A. For example, if A is a 3-by-4 matrix, then size(A) returns the vector [3 4].
If X is invertible, we could solve for W= inv(X)*Y. The inv() function returns the inverse of a matrix. If n ~= d, however, we can still solve for the least squares estimate of W by taking the pseudo inverse of X, namely inv(X'*X)*X', or more concisely using the Matlab function, pinv(X). Matlab allows you to solve more directly, (and ...
MATLAB provides efficient functions to create some commonly used matrices. Create a 3 by 5 matrix with all elements equal to zero. The command zeros(m,n) creates an m by n array (matrix) of zeros.
Find Array Elements That Meet Conditions. This example shows how to filter the elements of an array by applying conditions to the array. For instance, you can examine the even elements in a matrix, find the location of all 0s in a multidimensional array, or replace NaN values in data.
