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What is SIN() function?

  • The sine function is one of the basic functions encountered in trigonometry (the others being the cosecant, cosine, cotangent, secant, and tangent).
  • Let be an angle measured counterclockwise from the x-axis along an arc of the unit circle.
 sin function in apache pig

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SIN() function in Apache Pig

  • The SIN() function of Pig Latin is used to calculate the sine value of a given expression.


grunt> SIN(expression)


  • 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 given below.


  • You have loaded this file into 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);
  • Now, you can generate the sine values of the contents of the wikitechy_math.txt file using SIN() function as given below.
grunt> sin_data = foreach math_data generate (data), SIN(data);


Verify the contents of the relation using the Dump operator as shown below.

grunt> Dump sin_data;


  • The above statement stores the result in the relation named sin_data.

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