WebSep 15, 2024 · I know of the way to first replace all of empty cells with 0 and they use the find and cellfun function. But is there a simpler way? Lets say A={2 5 0 10 0 [] 22 0 13} index=find(~cellfun(@isempty,A)) % index for non-empty cells Is there a way to find indexes for those who contain positive numbers only? Thanks btw using MatLab 2015a WebJun 7, 2024 · The nnz () function of MATLAB is used to find the nonzero elements present in a vector or matrix. The following is the basic syntax of the nnz () function. Syntax: num = nnz(m) The syntax will return the total number of nonzero elements stored inside the matrix or vector m and store it in the variable num.
Finding a max in a column and making all other elements equal …
WebUse nnz in conjunction with a relational operator to determine how many matrix elements meet a condition. Since relational operators produce logical matrices of 1s and 0s, the … WebJul 4, 2024 · You can use indexing to access the elements of the array. In MATLAB the array indexing starts from 1. To find the index of the element in the array, you can use the find() function. Using the find() function you can find the indices and the element from the array. The find() function returns a vector containing the data. Syntax: ps in lung cancer
How to Find the Position of a Number in an Array in MATLAB?
WebNov 2, 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. WebThe density of a matrix is the ratio of nonzeros to the total number of elements, nnz (X)/numel (X). Create a sparse matrix representing the finite difference Laplacian on an L-shaped domain and calculate its density. X = delsq (numgrid ( 'L' ,20)); spy (X) d = nnz (X)/numel (X) d = 0.0194. The result indicates that only about 2% of the ... WebJun 26, 2024 · Actually array A saves the number of non-zero elements in each rows of a sparse matrix B. I want to do some calculations on those selected rows in B with certian number of non-zero elements. I want to find out the … ps in instagram