n = numel(A)returns the number of elements,n, in arrayA, equivalent toprod(size(A)). example Examples collapse all Number of Elements in 3-D Matrix Create a 4-by-4-by-2 matrix. A = magic(4); A(:,:,2) = A' A = A(:,:,1) = 16 2 3 13 5 11 10 8 9 7 6 12 4 ...
Number of array elements collapse all in pageSyntax n = numel(A)Description n = numel(A) returns the number of elements, n, in array A, equivalent to prod(size(A)). exampleExamples collapse all Number of Elements in 3-D Matrix Copy Code Copy Command Create a 4-by-4-by-2 matrix. ...
I have a matrix, 2xT. It contains value PAIRS that are unique and some that are repeated. I would like to order the matrix by the pairs that occur the most frequently. myData = randi([0 20], [10000 2]);%make up some data ...
I want to count number of elements in the 2nd column of a matrix more or less than given numbers x and y. For example, In the matrix A, x=20 and y=10.Thus the count of numbers >20 and <10 (i.e not between 10 to 20) is 5 A = 1 23 2 9 3 55 4 7...
N = nnz(X)returns the number of nonzero elements in matrixX. example Examples collapse all Number of Nonzeros Create an identity matrix and determine the number of nonzeros it contains. X = eye(4) X =4×41 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 ...
mxGetNumberOfElementsreturns the number of elements in the specifiedmxArray, returned assize_t. For example, if the dimensions of an array are 3-by-5-by-10, thenmxGetNumberOfElementsreturns the number150. Input Arguments expand all Examples ...
Sum the Elements of a Matrix Using thesum()Function in MATLAB To find the sum of all the elements of a matrix, we can use thesum()function. In the case of a matrix, we have to use thesum()function two times, one for rows and one for columns, but in the case of a vector, we...
nel=50; % number of elements nnel=2; % number of nodes per element ndof=2; % number of dofs per node nnode=(nnel-1)*nel+1; % total number of nodes in system sdof=nnode*ndof; % total system dofs % Material properties
Matrix elements in Matlab are stored in columns, and the elements in the matrix can be obtained by the serial number or subscript of the matrix element. 利用英文冒号可以获取矩阵的子矩阵,通常英文冒号表示矩阵的某一列或某一行的全部元素。
% length - Length of vector. % ndims - Number of dimensions. % numel - Number of elements. % disp - Display matrix or text. % isempty - True for empty array. % isequal - True if arrays are numerically equal. % isequaln - True if arrays are numerically equal, treating NaNs as ...