R cheat sheet

ToC

Basics

Concatenation, length of vectors, numeric operations, matrix creation



In [2]:

    
x = c(1,2,3,4,5,6) #concatenate to create a vector
x



In [4]:

    
length(x)

vector 1 + vector 2 is a element by element summation



In [5]:

    
y = c(8,9,10,11,12,14)
x_y = x+y
x_y

use ls()



In [6]:

    
ls()









    





	'x'
	'x_y'
	'y'

remove variables using rm(var_name)



In [8]:

    
rm('x_y')
ls()









    





	'x'
	'y'

use ?symbol to get help



In [7]:

    
?ls

use matrix(data, nrow, ncol) method to build a nd matrix



In [9]:

    
m1 = matrix(data= x, nrow=2, ncol=3)
m1



In [ ]: