Have you ever needed to calculate matrix multiplication and found yourself doing it manually in an Excel spreadsheet or on paper? If yes, then you know that it is a tedious process and one that can easily result in errors. But don't worry, because now there's a much faster and more accurate solution: the matrix calculator.

The matrix calculator is an online tool that allows you to enter two matrices and receive the result of their multiplication. With just a few clicks, you can get an exact answer without having to spend hours doing calculations.

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## Matrix Calculator

In the matrix calculator, matrices must be entered as text in the text entry fields. Each matrix element must be separated by commas and a space and each line must be separated by a line break (skip line with enter).

If you put a comma without a space or a point, the calculation may not result as expected, as the calculator may interpret it as a decimal value. Put it like this: [2, 4, 7] (without the quotes).

## Is it giving Invalid Matrix?

For an array to be valid, it must have the following characteristics:

- The number of elements in each row of the matrix must be equal. In other words, each row must have the same amount of elements.
- Each array element must be a real or complex number. Arrays cannot contain non-numeric values such as letters or symbols.
- The dimensions of the matrix must be compatible with the operations that will be performed with it. For example, to multiply two matrices, the number of columns in the first matrix must equal the number of rows in the second matrix.

If an array does not meet these characteristics, it is considered invalid and may cause errors or incorrect results in array operations.

## How the calculation works

Calculating matrix multiplication is an operation that involves multiplying each element in a row of the first matrix by the corresponding elements in a column of the second matrix. The result is an element of the resulting array. This process is repeated for all rows and columns, generating a new matrix.

For example, if we have matrices A and B below:

A = [1 2 3] B = [4 5] [4 5 6] [6 7]

The result of multiplying A and B will be:

[1*4+2*6+3*6 1*5+2*7+3*9] [4*4+5*6+6*6 4*5+5*7+6*9]

This results in a new matrix with dimensions 2×2, like matrix C below:

C = [28 32] [64 74]

## Matrix calculator functions

The matrix calculator allows you to enter two matrices and receive the result of their multiplication. In addition, it checks whether the entered matrices are compatible for calculation and displays an error message if they are not.

Another useful function of the matrix calculator is the ability to convert text input into a matrix. This means that you can enter the arrays as text, separating each element with commas and each line with a line break. The calculator will convert them into real matrices for calculation.

Finally, the matrix calculator displays the result of the multiplication in a new matrix, with its correct dimensions and elements.

## Matrix calculator utilities

The matrix calculator is an extremely useful tool for students and professionals working with matrix calculus. It allows you to save time and avoid errors when performing matrix multiplication calculations.

This tool is particularly useful in areas such as engineering, physics, statistics, and computer science. If you're working on a project involving matrices, the matrix calculator can be your best friend.