3wtsvxq3y
3wtsvxq3y
Output:
X siteID BirdA BirdB BirdC elevation X.1 1 NA :------- :-----: :-----: :-----: :---------: NA 2 NA 1 3 2 0 275 NA 3 NA 2 1 5 1 550 NA 4 NA 3 0 0 3 850 NA 5 NA 4 4 3 2 322 NA
R Language Online Compiler
Write, Run & Share R Language code online using OneCompiler's R Language online compiler for free. It's one of the robust, feature-rich online compilers for R language, running on the latest version 3.4. Getting started with the OneCompiler's R Language compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as R
and start coding.
About R
R is very popular for data analytics which was created by Ross Ihaka and Robert Gentleman in 1993. Many big companies like Google, Facebook, Airbnb etc uses this language for data analytics. R is good for software developers, statisticians and data miners.
Key Features
- Interpreted programming language(no compilation required)
- provides highly extensible graphical techniques.
- Good community support
- Free and open-source
- Handles data very effectively.
Syntax help
Data Types
Data type | Description | Usage |
---|---|---|
Numeric | To represent decimal values | x=1.84 |
Integer | To represent integer values, L tells to store the value as integer | x=10L |
Complex | To represent complex values | x = 10+2i |
Logical | To represent boolean values, true or false | x = TRUE |
Character | To represent string values | x <- "One compiler" |
raw | Holds raw bytes |
Variables
Variables can be assigned using any of the leftward, rightward or equal to operator. You can print the variables using either print or cat functions.
var-name = value
var-name <- value
value -> var-name
Loops
1. IF Family:
If, If-else, Nested-Ifs are used when you want to perform a certain set of operations based on conditional expressions.
If
if(conditional-expression){
#code
}
If-else
if(conditional-expression){
#code if condition is true
} else {
#code if condition is false
}
Nested-If-else
if(condition-expression1) {
#code if above condition is true
} elseif(condition-expression2){
#code if above condition is true
}
elseif(condition-expression3) {
#code if above condition is true
}
...
else {
#code if all the conditions are false
}
2. Switch:
Switch is used to execute one set of statement from multiple conditions.
switch(expression, case-1, case-2, case-3....)
3. For:
For loop is used to iterate a set of statements based on a condition.
for (value in vector) {
# code
}
4. While:
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
# code
}
5. Repeat:
Repeat is used tyo iterate a set of statements with out any condition. You can write a user-defined condition to exit from the loop using IF
.
repeat {
#code
if(condition-expression) {
break
}
}
Functions
Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.
How to define a Function
func-name <- function(parameter_1, parameter_2, ...) {
#code for function body
}
How to call a Function
function_name (parameters)
Vectors
Vector is a basic data strucre where sequence of data values share same data type.
For example, the below statement assigns 1 to 10 values to x.
You can also use se() function to create vectors.
x <- 1:10
#using seq() function
x <- seq(1, 10, by=2)
the above statement prints the output as [1] 1 3 5 7 9
.