R function: rbind

Creating a matrix

# rbind stands for «row-bind». See also -> cbind

a <- 100:104
b <- 10 + 5*0:4
c <- c(17, 13, 22, 21, 18)

mat <- rbind(a, b, c)

class(mat)
# "matrix"

colnames(mat) <- c('val_1', 'val_2', 'val_3', 'val_4', 'val_5')

mat
#
#   val_1 val_2 val_3 val_4 val_5
# a   100   101   102   103   104
# b    10    15    20    25    30
# c    17    13    22    21    18

union all

wf_1 <- data.frame(
  col_1 = c('Foo', 'Bar', 'Baz'),
  col_2 = c(  11 ,   22 ,   33 )
)

df_2 <- data.frame(
  col_1 = c('one', 'two', 'three'),
  col_2 = c(    1,    2 ,     3  )
)

df_1
#   col_1 col_2
# 1   Foo    11
# 2   Bar    22
# 3   Baz    33

df_2
#   col_1 col_2
# 1   one     1
# 2   two     2
# 3 three     3


#
#  Note, column names bust be the same for rbind to work,
#  otherwise «names do not match previous names» error is
#  thrown.
#
rbind (df_1, df_2)
#   col_1 col_2
# 1   Foo    11
# 2   Bar    22
# 3   Baz    33
# 4   one     1
# 5   two     2
# 6 three     3

See also