Apache Pig - COSH()

The COSH() function of Pig Latin is used to calculate the hyperbolic cosine of a given expression.

Syntax

Here is the syntax of the COSH() function.

grunt> COSH(expression)

Example

Assume that there is a file named math.txt in the HDFS directory /pig_data/. This file contains integer and floating point values as shown below.

math.txt

5 
16 
9 
2.5 
5.9 
3.1 

And, we have loaded this file into Pig with a relation named math_data as shown below.

grunt> math_data = LOAD 'hdfs://localhost:9000/pig_data/math.txt' USING PigStorage(',')
   as (data:float);

Let us now calculate the hyperbolic cosine values of the contents of the math.txt file using COSH() function as shown below.

grunt> cosh_data = foreach math_data generate (data), COSH(data);

The above statement stores the result in the relation named cosh_data. Verify the contents of the relation using the Dump operator as shown below.

grunt> Dump cosh_data; 
 
(5.0,74.20994852478785) 
(16.0,4443055.260253992) 
(9.0,4051.5420254925943) 
(2.5,6.132289479663686) 
(5.9,182.52012106128686) 
(3.1,11.121499185584959)