Here we have passed ‘2’ as an argument, so the sum will be along dimension 2. This function will return sum along the dimension passed in argument. Here, the first non-singleton dimension is 1, so the sum will be along with the row elements. So, the sum will be along with the column elements
Here first non-singleton dimension is 2 (i.e.
So, some will be along with the row elements i.e. Here 1 is the first non-singleton dimension (the dimension whose length is not equal to 1). For a single row/column, we will get the result as one number. But before that, please keep in mind that in MATLAB, matrices have the following dimensions:Įxample #1 – When we have both rows & columnsĪs explained above, sum(A) will do the addition along the 1st dimension which is non-singleton. Now Let us understand sum(A) with an example. This dimension will become 1 and the size of other dimensions will not be changed. If A is a multidimensional array, sum(A) will operate along the 1st array dimension whose size is not equal to 1 and will treat all the elements as vectors.sum(A) will return a row vector which will have some of each column if A is a matrix.sum(A) will return the sum of the elements if A is vector.the size is not equal to 1 (It will consider the first dimension which is non-singleton). This will return the sum of all the elements of ‘A’ along the dimension of the array which is non-singleton i.e.Now let us understand all these functions one by one. S = sum(_, nanflag) Description of Sum Function in Matlab Hadoop, Data Science, Statistics & others
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