function [dataOUT] = correct_time_baseline(dataIN)
%CORRECT_TIME_BASELINE Summary of this function goes here
%   Detailed explanation goes here

%Create figure
f = figure('Units','Normalized',...
     'Position',[.3 .3 .4 .4],...
     'NumberTitle','off',...
     'Name','Choose Pretrigger');
%input field
inp = uicontrol('Style','Edit',...
     'Units','Normalized',...
     'Position',[.025 .025 .7 .05],...
     'Tag','myedit');
%"Done" button
p = uicontrol('Style','PushButton',...
     'Units','Normalized',...
     'Position',[.75 .025 .225 .05],...
     'String','Done',...
     'CallBack','uiresume(gcbf)');
%axes for plot
ax = axes(f,'Units','Normalized',...
     'Position',[.05 .125 .925 .85]);
%plot current data in figure
plot(ax,dataIN)
axis tight
%wait until button pressed
uiwait(f)
pretrigger = str2double(get(inp,'String'));

%timeline CORRECTING
data_size = size(dataIN);
dataOUT = zeros(data_size);
for n = 1:data_size(2)
    column_mean = mean(dataIN(1:pretrigger,n));
    dataOUT(:,n) = dataIN(:,n) - column_mean;
end
%plotting result
plot(ax,dataOUT)
axis tight
end