In the command below of creating a matrix, which parameter provides optional labels for the columns and rows.mymatrix <- matrix(vector, nrow=r, ncol=c, byrow=FALSE,dimnames=list(char_vector_rownames, char_vector_colnames))nrow=rbyrow=FALSEdimnames=list(char_vector_rownames,char_vector_colnames))ncol=c

% Create a new matrix "matC" by appending a row vector [10, 11, 12] to "matA".

In R, define the column vector

Fill in the blank to complete the function create_I_matrix( ) { int* matrix = malloc(sizeof(int) * length); for(int row = 0; row < length; row++) { for(int column = 0; column < length; column++) { if(row == column) { matrix[ row ][ column ] = 1; } else { matrix[ row ][ column ] = 0; } } } return matrix;}

A matrix is ___dimensionsinal rectangular data set?

How can you set a specific column as the row names of a data frame?rownames(df) <- df$columndf$column -> row.names(df)set_row(df, df$column)df[rowname] <- df$column