What does X * Y mean in MATLAB?

It indicates the end of a row when creating a matrix from other matrices. For example X = [1 2]; Y = [3,4]’; A = [X; Y’]

What is the difference between A * B and A * B in MATLAB?

In the expression C=A*B , the * operator is the standard matrix product, which collects the vector dot products combining all row vectors from A with all column vectors from B. The * is used for product between two numbers from dimension 1 i.e a*b in R.

What is a * b in MATLAB?

C = A . * B multiplies arrays A and B by multiplying corresponding elements. The sizes of A and B must be the same or be compatible. If the sizes of A and B are compatible, then the two arrays implicitly expand to match each other. C = times( A , B ) is an alternate way to execute A.

What is the difference between global variables and persistent variables?

Persistent variables are similar to global variables because MATLAB creates permanent storage for both. They differ from global variables because persistent variables are known only to the function that declares them. Therefore, code at the MATLAB command line or other functions cannot change persistent variables.

What is array operation in MATLAB?

Array operations execute element by element operations on corresponding elements of vectors, matrices, and multidimensional arrays. If the operands have the same size, then each element in the first operand gets matched up with the element in the same location in the second operand.

Whats the difference between * and * MATLAB?

* is matrix multiplication while . * is elementwise multiplication. In order to use the first operator, the operands should obey matrix multiplication rules in terms of size.

What is * used for in MATLAB?

MATLAB matches all characters in the name exactly except for the wildcard character * , which can match any one or more characters.

What does backslash mean in Matlab?

The backslash operator is used to solve a linear equation of the form a*x = b, where ‘a’ and ‘b’ are matrices and ‘x’ is a vector. It is used to calculate the left division between two matrices. For backslash operator to work, both the input matrices must have an equal number of rows.

Are AB and BA the same?

Well, if A and B are numbers,yes A*B=B*A is always true. If A and B are matrices,well A*B=B*A is not always true,it depends on the value of matrices.

What is the difference between matrix and array in MATLAB?

MATLAB® has two different types of arithmetic operations: array operations and matrix operations. Matrix operations follow the rules of linear algebra. By contrast, array operations execute element by element operations and support multidimensional arrays.

What is the difference between Numpy array and matrix?

Numpy matrices are strictly 2-dimensional, while numpy arrays (ndarrays) are N-dimensional. Matrix objects are a subclass of ndarray, so they inherit all the attributes and methods of ndarrays.

What is the difference between * and * in MATLAB?

*is matrix multiplication while .*is elementwise multiplication. In order to use the first operator, the operands should obey matrix multiplication rules in terms of size. For the second operator vector lengths(vertical or horizontal directions may differ) or matrix sizes should be equal for elementwise multiplication Share

What functions are not available in the MATLAB version?

There are a few functions that aren’t implemented, usually to do with specific missing Octave functionality (GUI, DLL, Java, ActiveX, DDE, web, and serial functions). Some of the core functions have limitations that aren’t in the Matlab version.

What happens when you subtract a vector in MATLAB?

When you perform the subtraction, the vector is implicitly expanded to become a 3-by-3 matrix. A row vector and a column vector have compatible sizes. If you add a 1-by-3 vector to a 2-by-1 vector, then each vector implicitly expands into a 2-by-3 matrix before MATLAB executes the element-wise addition.

Does MATLAB support object-oriented programming?

Matlab classdef object oriented programming is only partially supported, see classdef for details. A large number of the Matlab core functions (i.e. those that are in the core and not a toolbox) are implemented, and certainly all of the commonly used ones.