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What is Apache Pig - ASIN()?
- The ASIN() function is used to calculate the arc sine value of a given expression
Syntax
- Here is the syntax of the ASIN() function.
grunt> ASIN(expression)
Example
- Assume that there is a file named wikitechy_math.txt in the HDFSdirectory /pig_data/. This file contains integer and floating point values as shown below
wikitechy_math.txt
3
10
15
6.5
4.9
7.5
- And, we have loaded this file into Pig with a relation named wikitechy_math_data as shown below
- Let us now calculate the arc sine values of the contents of the wikitechy_math.txt file using ASIN() function as shown below
grunt> asin_data = foreach wikitechy_math_data generate (data), ASIN(data);
- The above statement stores the result in the relation named asin_data. Verify the contents of the relation using the Dump operator as shown below.
grunt> Dump asin_data;
(3.0,NaN)
(10.0,NaN)
(15.0,NaN)
(6.5,NaN)
(4.9,NaN)
(7.5,NaN)