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What is cosh() function?
- The inverse hyperbolic functions are the area hyperbolic sine "arsinh" (also denoted "sinh−1", "asinh" or sometimes "arcsinh") and so on.
- Just as the points (cos t, sin t) form a circle with a unit radius, the points (cosh t, sinh t) form the right half of the equilateral hyperbola.
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COSH() function in Apache Pic
- The COSH() function of Pig Latin is used to compute the hyperbolic cosine of a specified expression.
Syntax:
grunt> COSH(expression)
Example:
- Ensure that we have a file named wikitechy_math.txt in the HDFS directory /pig_data/.
- This file contains integer and floating point values as shown below.
Wikitechy_math.txt
5
16
9
2.5
5.9
3.1
- You have loaded this file nito Pig with a relation named math_data as given below.
grunt> math_data = LOAD 'hdfs://localhost:9000/pig_data/wikitechy_math.txt' USING PigStorage(',')
as (data:float);
- You compute the hyperbolic cosine values of the contents of the wikitechy_math.txt file using COSH() function as shown below.
grunt> cosh_data = foreach math_data generate (data), COSH(data);
- Above statement stores the result in the relation named cosh_data.
Verification:
Now you can the contents of the relation using the Dump operator as given below.
grunt> Dump cosh_data;
Output:
The output shows that the result in the file>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)