I want to calculates the sum of each row and column of a matrix. Given an NxN matrixmm, is there a way to linearize the following code? forjj=1:N sm(jj)=sum(mm(jj,:)) + sum(mm(:,jj));endsm = sm -diag(mm)'; As an example: mm=[123;123;123] mm =123123123forjj=1:3...
S = sum(A) returns the sum of the elements of A along the first array dimension whose size does not equal 1. If A is a vector, then sum(A) returns the sum of the elements. If A is a matrix, then sum(A) returns a row vector containing the sum of each column. If A is a ...
S = sum(A) returns the sum of the elements of A along the first array dimension whose size does not equal 1. If A is a vector, then sum(A) returns the sum of the elements. If A is a matrix, then sum(A) returns a row vector containing the sum of each column. If A is a ...
of elements.s = sum(x)is the sum of the elements of the vector x.if x is a matrix,s is a row vector with the sum over each column.for n-d arrays,sum(x)operates along the first non-singleton dimension.if x is floating point,that is double or single,s is accumulated ...
S = sum(A) returns the sum of the elements of A along the first array dimension whose size does not equal 1. If A is a vector, then sum(A) returns the sum of the elements. If A is a matrix, then sum(A) returns a row vector containing the sum of each column. If A is a ...
It might be more efficient to re-arrange the columns or rows. But it's good to lean different techniques. Similar questions were asked here. http://www.mathworks.com/matlabcentral/answers/18989-find-imax-and-jmax-of-a-and-substitute-in-new-matrix-b-for-1st-row-and-1st-column ...
下面是matlab中sum函数的代码，可以看出里面也是用for循环实现的~~function s = sum(A,dim)SUM Sum of the elements.For vectors, SUM(X) is the sum of the elements of X.For matrices, SUM(X) or SUM(X,1) is a row vector of column sums and SUM(X,2) is a column vector ...
Enter the valuesforrow2,column3:3 b) sum the elements of the middle column. The MATLAB function sum() must not be used in your solution (10 marks) Sample Output: Given A = [ 5, 4, 6, 7, 3 ; 1, 2, 3, 4, 5 ; 5, 6, 4, 2, 4 ; 4, 5, 3, 2, 1] ...
S = sum(A) returns the sum of the elements of A along the first array dimension whose size does not equal 1. If A is a vector, then sum(A) returns the sum of the elements. If A is a matrix, then sum(A) returns a row vector containing the sum of each column. If A is a ...
If A is a vector, then cumsum(A) returns a vector containing the cumulative sum of the elements of A. If A is a matrix, then cumsum(A) returns a matrix containing the cumulative sums of each column of A. If A is a multidimensional array, then cumsum(A) acts along the first nonsin...