Chapter 10 R recycles if columns are not equal

num2 <- 1:10
alt2 <- cbind(patients, num2)

## Warning in cbind(patients, num2): number of rows of result is not a multiple of
## vector length (arg 1)

alt2

##       patients num2
##  [1,] "Bill"   "1" 
##  [2,] "Gina"   "2" 
##  [3,] "Kelly"  "3" 
##  [4,] "Sean"   "4" 
##  [5,] "Bill"   "5" 
##  [6,] "Gina"   "6" 
##  [7,] "Kelly"  "7" 
##  [8,] "Sean"   "8" 
##  [9,] "Bill"   "9" 
## [10,] "Gina"   "10"

df <- data.frame(patients, my_matrix)

df

##   patients X1 X2 X3 X4 X5
## 1     Bill  1  5  9 13 17
## 2     Gina  2  6 10 14 18
## 3    Kelly  3  7 11 15 19
## 4     Sean  4  8 12 16 20

class(df)

## [1] "data.frame"