%ADDPREPROC Add commands in the PREPROC field of a datafile%%   A = ADDPREPROC(A,PREPROC,PARS,OUTSIZE)%% INPUT%   A       - Datafile%   PREPROC - String with preprocessing command%   PARS    - Cell array with parameters (default empty)%   OUTSIZE - Output size of objects%% OUTPUT%   A       - Datafile%% DESCRIPTION% Extends the structure array of preprocessing commands, A.PREPROC( )% with one element, having two fields:% A.PREPROC(N).PREPROC = PREPROC% A.PREPROC(N).PARS = PARS%% Preprocessing can only be defined for raw datafiles that do not contain% datasets. It is an error to define preprocessing for a datafile that% points to MAT files. In that case datasets are expected and preprocessing% is superfluous.%% The first command in the PREPROC field should always be a file read% command. The DATAFILE constructor stores by default IMREAD. Use% SETPREPROC to clear the PREPROC field and replace it by another% command.%% PRTools needs to know the size of the output objects. If not supplied in% the call, it is found by processing the first object. This may take some% time.%% SEE ALSO % DATAFILES, SETPREPROC, ADDPOSTPROC, DATASETS