Returns the matrix product of two arrays. The result is an array with the same number of rows as array1 and the same number of columns as array2.
Syntax
MMULT(array1,array2)
Array1, array2 are the arrays you want to multiply.
Remarks
The number of columns in array1 must be the same as the number of rows in array2, and both arrays must contain only numbers.
where i is the row number, and j is the column number.
Example 1
The example may be easier to understand if you copy it to a blank spreadsheet.
Selecting an example from Help
Array 1 | Array 1 |
---|---|
1 | 3 |
7 | 2 |
Array 2 | Array 2 |
2 | 0 |
0 | 2 |
Formula | Formula |
=MMULT(A2:B3,A5:B6) | |
Note The formula in the example must be entered as an array formula. After copying the example to a blank spreadsheet, select the range A8:B9 starting with the formula cell. Press F2, and then press CTRL+SHIFT+ENTER. If the formula is not entered as an array formula, the single result is 2.
Example 2
The example may be easier to understand if you copy it to a blank spreadsheet.
Selecting an example from Help
Array 1 | Array 1 |
---|---|
3 | 0 |
2 | 0 |
Array 2 | Array 2 |
2 | 0 |
0 | 2 |
Formula | Formula |
=MMULT(A2:B3,A5:B6) | |
Note The formula in the example must be entered as an array formula. After copying the example to a blank spreadsheet, select the range A8:B9 starting with the formula cell. Press F2, and then press CTRL+SHIFT+ENTER. If the formula is not entered as an array formula, the single result is 6.