code: public static DMatrixRMaj loadCSV(String fileName , int numRows , int numCols )
          throws IOException
      {
          FileInputStream fileStream = new FileInputStream(fileName);
          ReadMatrixCsv csv = new ReadMatrixCsv(fileStream);
  
          DMatrixRMaj ret = csv.readDDRM(numRows, numCols);
  
          fileStream.close();
  
          return ret;
      }
docs: Reads a matrix in which has been encoded using a Column Space Value (CSV)
  file format.  For a description of the format see {@link MatrixIO#loadCSV(String,boolean)}.
  
  @param fileName The file being loaded.
  @param numRows number of rows in the matrix.
  @param numCols number of columns in the matrix.
  @return DMatrixRMaj
  @throws IOException