plx_ad_span_v.m

function [adfreq, n, ad] = plx_ad_span_v(filename, channel, startCount, endCount)
% plx_ad_span_v(filename, channel): Read a span of a/d data from a .plx file
%
% [adfreq, n, ad] = plx_ad_span_v(filename, channel, startCount, endCount)
%
% INPUT:
%   filename - if empty string, will use File Open dialog
%   startCount - index of first sample to fetch
%   endCount - index of last sample to fetch
%   channel - 0 - based channel number
%
% OUTPUT:
%   adfreq - digitization frequency for this channel
%   n - total number of data points 
%   ad - array of a/d values converted to mV

if nargin < 4
    error 'Expected 4 input arguments';
end
if (isempty(filename))
   [fname, pathname] = uigetfile('*.plx', 'Select a Plexon .plx file');
   if isequal(fname,0)
     error 'No file was selected'
   end
   filename = fullfile(pathname, fname);
end

[adfreq, n, ad] = mexPlex(18, filename, channel, startCount, endCount);