Java: Data Science Made Easy

Reading in a CSV file

ND4J provides the CSVRecordReader class, which is useful for reading CSV data. It has three overloaded constructors. The one we will demonstrate is passed two arguments. The first is the number of lines to skip when first reading a file and the second is a string holding the delimiters used to parse the text.

In the following code, we create a new instance of the class, where we do not skip any lines and use only a comma for a delimiter:

RecordReader recordReader = new CSVRecordReader(0, ","); 

The class implements the RecordReader interface. It has an initialize method that is passed an instance of the FileSplit class. One of its constructors is passed an instance of a File object that references a dataset. The FileSplit ...