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)