**What does the determinant of a matrix mean? Quora**

Multiplying a Vector by a Matrix To multiply a row vector by a column vector, the row vector must have as many columns as the column vector has rows. Let us define the multiplication between a matrix A and a vector x in which the number of columns in A equals the number of rows in x .... In this example, the initial matrix has 3 columns and the second matrix has 3 rows so they can be multiplied. The resulting matrix will be 3 x 3. The resulting matrix will be 3 x 3. To multiply

**Multiplying a Vector by a Matrix Varsity Tutors**

It is only through the order of matrix involved in the calculation that we decide whether the matrices are eligible to get multiplied. For matrix multiplication to work, the columns of the second matrix have to have the same number of entries as do the rows of the first matrix. Hence, A and B above can’t be multiplied as neither 3=4 (For A x B) or 3=2 (For B x A). This brings another issue:... Yes, it wll give you a 2xx1 matrix! When you consider the order of the matrices involved in a multiplication you look at the digits at the extremes to "see" the order of the result. In this case (red digits): color(red)(2)xx2 and 2xxcolor(red)(1) So the result will be a 2xx1. The internal ones 2 and 2 tell you if the multiplication is possible

**How do you determine if you can multiply two matrices?**

17/12/2009 · Best Answer: Yes, you can. We know that two matrices, with dimensions AxB and CxD can be multiplied together to make a matrix with dimensions AxD iff B = C. how to turn airplane mode off windows 8 In this example, the initial matrix has 3 columns and the second matrix has 3 rows so they can be multiplied. The resulting matrix will be 3 x 3. The resulting matrix will be 3 x 3. To multiply

**How much matrix algebra do statistics students REALLY need**

A symmetricmatrix is a square matrix which is symmetric about its leading diagonal (top left to bottom right). The following are symmetric matrices: M = 4 ?1 ?1 9! N = 2 7 3 7 9 4 3 4 7 Note that the leading diagonal is a line of symmetry - a mirror line. Thetransposeofamatrix If the rows and columns of a matrix A are interchanged (so that the ?rst row becomes the ?rst column, the how to tell if a greek man likes you It is only through the order of matrix involved in the calculation that we decide whether the matrices are eligible to get multiplied. For matrix multiplication to work, the columns of the second matrix have to have the same number of entries as do the rows of the first matrix. Hence, A and B above can’t be multiplied as neither 3=4 (For A x B) or 3=2 (For B x A). This brings another issue:

## How long can it take?

### SOLUTION Determine whether the product of matrices A and

- Matrix multiplication Wikipedia
- How to multiply two column matrices Quora
- How to multiply two column matrices Quora
- Order of Matrix and Matrix Multiplication

## How To Tell If A Matrix Can Be Multiplied

You can only multiply two matrices if their dimensions are compatible , which means the number of columns in the first matrix is the same as the number of rows in the second matrix. If A = [ a i j ] is an m ? n matrix and B = [ b i j ] is an n ? p matrix, the product A B is an m ? p matrix.

- 17/08/2011 · By the way, you can know if you can multiply matrixs together if the number of columns in one matrix is the same number of rows in another matrix. In this matrix (2 x 3), 2 represents the number of rows and 3 represents the number of columns.
- In this example, the initial matrix has 3 columns and the second matrix has 3 rows so they can be multiplied. The resulting matrix will be 3 x 3. The resulting matrix will be 3 x 3. To multiply
- This means that we can only multiply two matrices if the number of columns in the first matrix is equal to the number of rows in the second matrix. An easy method to determine whether two matrices can be multiplied together would be to check the order of the matrices.
- Now I guess I have to prove it, so add this code to the bottom so it will compare my code to the usual Mathworks matrix multiplication method and show that there is no difference: % Do it the usual way, with matrix multiplication instead of for loops.