PRTools Contents

PRTools User Guide



Save datafile


 A Datafile, or cell array with datafiles and/or datasets
 FEATSIZE Feature size, i.e. image size of a single object in B Default: as it is.
 NAME Desired name of directory
 NBITS # of bits in case of rescaling (8,16 or 32) Default: no rescaling
 FILESIZE # of elements stored in a single file  Default 10000000.

 B New datafile


The datafile A is completed by desired preprocessing and postprocessing.  It should therefore be convertable to a dataset. It is saved in the  directory NAME and B refers to it. If desired the data and target fields  are compressed (after appropriate rescaling) to NBITS unsigned integers.  The stored datafile can be retrieved by


B is a 'mature' datafile, i.e. a dataset distributed over a number of  files with maximum size FILESIZE. This has only advantages over a 'raw'  datafile defined for a directory of images in case of substantial pre-  and postprocessing, due to the overhead of the dataset construct of B FEATSIZE can be used to reshape the size of object (e.g. from 256 to  [16 16])

If A is cell array with datafiles and/or datasets, they are first  horizontally concatenated before the datafile is written. The first  element in A should be a datafile.

The difference with CREATEDATAFILE is that SAVEDATAFILE assumes that  the datafile after completion by preprocessing can be converted into a  dataset and the data is stored as such and as compact as possible.  CREATEDATAFILE saves every object in a separate file and is thereby  useful in case preprocessing does not yield a proper dataset with the  same number of features for every object.

See also

datafiles, datasets, createdatafile,

PRTools Contents

PRTools User Guide

This file has been automatically generated. If badly readable, use the help-command in Matlab.