# create vectors
x=c(1,2,3,4,3,4,5)
y=c(4,5,6,7,2,3,4)
# pass these vectors to the
# input of dataframe1(a)
a=data.frame(x,y)
# create vectors
x=c(10,20,30,40,50,60,70)
y=c(40,50,60,40,50,60,70)
# pass these vectors to the
# input of dataframe1(a)
b=data.frame(x,y)
# apply rbind function to
# merge rows
print(rbind(a,b))