# R Example for Beginners – R Program to find Sum, Mean and Product of a Vector

In this Learn by Coding example, we are explaining how to write an R program to find Sum, Mean, and Product of a Vector, ignore elements like NA or NaN. Here we are using built-in functions sum, mean, prod for this calculation. The numbers are passed to these functions directly here. The function sum() returns the sum of all the values present in its arguments. The sum of the values dividing with the number of values in a data series is calculated using the mean() function. Finally, the prod() is for finding the product of given arguments.

sum(…, na.rm = FALSE); mean(x, …); prod(…, na.rm = FALSE);
In the above function argument structure by making na.rm = TRUE we can avoid the elements like NA, NAN.

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## Two Machine Learning Fields

There are two sides to machine learning:

• Practical Machine Learning: This is about querying databases, cleaning data, writing scripts to transform data and gluing algorithm and libraries together and writing custom code to squeeze reliable answers from data to satisfy difficult and ill defined questions. It’s the mess of reality.
• Theoretical Machine Learning: This is about math and abstraction and idealized scenarios and limits and beauty and informing what is possible. It is a whole lot neater and cleaner and removed from the mess of reality.

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