How to Create Matrices and Perform matrix Operations in R
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- Опубликовано: 22 авг 2024
- This video is about creating matrices and performing matrix operations in R programming. Matrix is a collection of elements of same data type which are arranged in rows and columns. A matrix has two dimensions which are rows and columns. For example, if a matrix has 3 rows and 2 columns, then the dimensions of this matrix are 3 x 2.
In R, matrices can be created using the matrix() function. In matrix syntex, data argument specifies data values or elements of the matrix. nrow specifies the desired number of rows. Next to nrow is ncol which stands for the number of columns. byrow is a logical argument and by default it is set to False. It means the matrix will be filled by columns. If you want to fill elements by rows then you have to mention byrow equals to true. The last argument is dimnames which is used to give the names to the dimensions.
To arrange the value in this matrix row wise, we will add byrow argument TRUE in this code. To access a particular element from a matrix, we type the name of the matrix and then type square bracket and in this square bracket we type row number comma and column number. You can also add, multiply, divide and subtract a specific value to each element of a matrix and store it into a new matrix.
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