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6.8.5 transforming List to Vector
            You can transform a list into a vector for performing further manipulations on the elements of the vector. Once a list
            is converted to a vector, all the arithmetic operations are possible on vectors.
            To convert a list into a vector, the unlist() function can be used. This function takes a list as input and generates a
            vector as an output.
            An example of converting lists into vectors and performing addition on them.

            Example
            Enter the following code snippet:

                # Creating two lists.
                list1 <- list(2:6)
                print(list1)
                list2 <-list(11:15)
                print(list2)
                # Converting the lists to vectors.
                v1 <- unlist(list1)
                v2 <- unlist(list2)
                print(v1)
                print(v2)
                # Now add the vectors
                result <- v1+v2
                print(result)
            The following is displayed:
































            6.9 matrix

            Matrices are the R objects in which the elements are arranged in a two-dimensional rectangular layout. They contain
            elements of the same atomic type. Though you can create a matrix containing only characters or only logical values,
            they are not very useful. We use matrices containing numeric elements to be used in mathematical calculations.





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