Write a R program to create a 5 × 4 matrix , 3 × 3 matrix with labels and fill the matrix by rows and 2 × 2 matrix with labels and fill the matrix by columns
- برمجة R
- 2021-09-04
- adonis77j
الأجوبة
m1 = matrix(1:20, nrow=5, ncol=4)
print("5 × 4 matrix:")
print(m1)
cells = c(1,3,5,7,8,9,11,12,14)
rnames = c("Row1", "Row2", "Row3")
cnames = c("Col1", "Col2", "Col3")
m2 = matrix(cells, nrow=3, ncol=3, byrow=TRUE, dimnames=list(rnames, cnames))
print("3 × 3 matrix with labels, filled by rows: ")
print(m2)
print("3 × 3 matrix with labels, filled by columns: ")
m3 = matrix(cells, nrow=3, ncol=3, byrow=FALSE, dimnames=list(rnames, cnames))
print(m3)Sample Output:
[1] "5 × 4 matrix:"
[,1] [,2] [,3] [,4]
[1,] 1 6 11 16
[2,] 2 7 12 17
[3,] 3 8 13 18
[4,] 4 9 14 19
[5,] 5 10 15 20
[1] "3 × 3 matrix with labels, filled by rows: "
Col1 Col2 Col3
Row1 1 3 5
Row2 7 8 9
Row3 11 12 14
[1] "3 × 3 matrix with labels, filled by columns: "
Col1 Col2 Col3
Row1 1 7 11
Row2 3 8 12
Row3 5 9 14أسئلة مشابهة
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