What is the difference between matlab a and b multiplication?

matlab The difference between a and b multiplication: 1. [a.*b] is preceded by dot multiplication, which requires the number of elements of the two variables to be equal and arranged in the same way, such as both row vectors or columns Vectors or matrices; 2. [a*b] The latter is matrix multiplication, requiring the same internal dimensions.

Difference:

a.*bThe front is dot multiplication, which requires the number of elements of the two variables to be equal. The arrangement is the same, such as row vectors, column vectors or matrices. a*bThe latter is matrix multiplication, which requires the same internal dimensions.

Use examples to illustrate the difference between the two multiplications C=A.B, C=AB in matlab

1. A matrix

2. B matrix

3. C=A.*B

##4. C=A*B

Extended information:

provides two operation rules:

1) A.B

During this operation, it must be ensured that the shapes of matrices A and B are the same, that is, they are both mn matrices. The result of the operation is that the elements at the corresponding positions are multiplied to form a matrix of the same shape (mn), that is, C=AijBij;

2)AB

This operation is the same as the matrix multiplication calculation method in linear algebra. The same, the shape of A and B does not need to be the same, but the number of columns of A and the number of rows of B must be the same (for example: A is an mn matrix and B is an n*p matrix).

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