Understanding Matrices
A matrix is a two-dimensional data structure where each element is identified by its row and column position, and elements must be of the same data type.
In R, matrices can be created in different ways. The most common are by merging vectors as rows or by merging them as columns.
Creating Matrix from Rows
You can create a matrix by combining vectors as rows with rbind()
function.
Example
12345row_1 = c(1, 2, 3) row_2 = c(4, 5, 6) # Bind rows into a matrix rbind(row_1, row_2)
This produces a matrix with two rows and three columns.
Creating Matrix from Columns
Alternatively, you can create a matrix by combining vectors as columns with cbind()
function.
Example
12345col_1 = c(1, 2, 3) col_2 = c(4, 5, 6) # Bind columns into a matrix cbind(col_1, col_2)
This produces a matrix with three rows and two columns.
Swipe to start coding
- Create two vectors:
a
with integers from1
to4
;b
with integers from5
to8
.
Use the colon (:
) sign syntax for a range.
- Create and output matrix by merging
a
andb
as rows. - Create and output matrix by merging
a
andb
as columns.
Solution
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Understanding Matrices
Swipe to show menu
A matrix is a two-dimensional data structure where each element is identified by its row and column position, and elements must be of the same data type.
In R, matrices can be created in different ways. The most common are by merging vectors as rows or by merging them as columns.
Creating Matrix from Rows
You can create a matrix by combining vectors as rows with rbind()
function.
Example
12345row_1 = c(1, 2, 3) row_2 = c(4, 5, 6) # Bind rows into a matrix rbind(row_1, row_2)
This produces a matrix with two rows and three columns.
Creating Matrix from Columns
Alternatively, you can create a matrix by combining vectors as columns with cbind()
function.
Example
12345col_1 = c(1, 2, 3) col_2 = c(4, 5, 6) # Bind columns into a matrix cbind(col_1, col_2)
This produces a matrix with three rows and two columns.
Swipe to start coding
- Create two vectors:
a
with integers from1
to4
;b
with integers from5
to8
.
Use the colon (:
) sign syntax for a range.
- Create and output matrix by merging
a
andb
as rows. - Create and output matrix by merging
a
andb
as columns.
Solution
Thanks for your feedback!
single