R Programming Examples- 2

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Code	Execution
chose(12,8)	Combination of 8 objects out of 12. 12C3
gamma(5)	Gives value of gamma function
?’+’	Arithmetic Operator help page.
factorial(9)	9!
exp(2.3)	e2.3
2.7^2	2.72
sqrt(64)	Square Root of 64
beta(2,3)	Value of beta function with parameters 2 & 3.
round(2.3)	Rounds 2.3. See more examples in the examples section below.
round(2.476,2)	Rounds the value up to 2 digits.
pi	Gives value
abs(-2)	Gives absolute value
b=3	Assigns b as 3
class(b)	Type of object of b.
class(log)	To test the type of log. Note: It can be done for testing any function or value. Also note, log is a function while ‘b’ is a numeric/value.
x=c(1,3,4,5)	Makes a vector with the values respectively.
x=scan()	Another option to make a vector. Note: after pressing Enter, input values as many as you need. Then again push Enter to stop entering values. See example below.
rm(x)	Deletes a command
y=seq(1,3,.1)	Gives values 1 through 3 with difference .1.
x=1:100	Does almost same but applicable for integers only as you cannot define difference.
rep(1,10)	Gives 1 10 times.
floor(2.3)	Transforms to nearest lower integer.
floor(2.9)	Transforms to nearest lower integer. Note : Unlike ‘round’ it goes below rather than above.
ceiling(2.3)	Nearest upper Integer.
ceiling(2.3)	Nearest upper Integer.
round(2.3)	Rounding the value
round(2.6)	Rounding the value