Group of routines to open, read and write data files.

file_ext Routine to add a file extension to a base file name

open_out_file Routine to open a file for writing, given its name with extension

get_header Routine to read beginning of file to identify its header.

check_wav Routine to identify wave file header.

check_nsp Routine to identify NSP file header.

read_data Routine to read data from file.

read_25 Routine to read (downsampled) data from file.

write_nsp_head Routine to write nsp header to file.

write_data Routine to write data to file.

save_plot Routine to save plot information to file.

matrix_write Routine to write an array of vectors to a file.

vector_write Routine to write a vector to a file.