vb_analog_trigger_new

 Create analog trigger.

 [USAGE]
    vb_analog_trigger_new(ch_name, slope trig_level);
 [IN]
       ch_name : extract trigger from this channel [string]
         slope : trigger slope. ('low_to_high' or 'high_to_low') [string]
    trig_level : factor for amplitude threshold.
 [OUT]
           obj : analog_trigger object
 [see also]
    vb_get_trigger_event

 Copyright (C) 2011, ATR All Rights Reserved.
 License : New BSD License(see VBMEG_LICENSE.txt)

0001 function [obj] = vb_analog_trigger_new(ch_name, slope, trig_level)
0002 % Create analog trigger.
0003 %
0004 % [USAGE]
0005 %    vb_analog_trigger_new(ch_name, slope trig_level);
0006 % [IN]
0007 %       ch_name : extract trigger from this channel [string]
0008 %         slope : trigger slope. ('low_to_high' or 'high_to_low') [string]
0009 %    trig_level : factor for amplitude threshold.
0010 % [OUT]
0011 %           obj : analog_trigger object
0012 % [see also]
0013 %    vb_get_trigger_event
0014 %
0015 % Copyright (C) 2011, ATR All Rights Reserved.
0016 % License : New BSD License(see VBMEG_LICENSE.txt)
0017 
0018 %
0019 % --- Previous check
0020 %
0021 if nargin < 3
0022     error('This function needs 3 argments. Please check your code.');
0023 end
0024 if ~strcmp(slope, 'low_to_high') && ~strcmp(slope, 'high_to_low')
0025     error('trigger slope must be low_to_high or high_to_low');
0026 end
0027 
0028 %
0029 % --- Main Procedure
0030 %
0031 obj = vb_trigger_new(ch_name, 'analog', trig_level);
0032 
0033 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0034 % obj.FIELDNAMES SHOULD BE DEFINED FOR vb_get_trial_time_index
0035 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0036 obj.slope = slope;
0037 
0038 %
0039 % --- After check
0040 %
0041 if nargout < 1
0042     error('function caller should receive this object.');
0043 end