view aim-mat/tools/@signal/linsigx.m @ 0:74dedb26614d

Initial checkin of AIM-MAT version 1.5 (6.4.2011).

% method of class @signal
% 
%   INPUT VALUES:
%  
%   RETURN VALUE:
%
% 
% (c) 2003-2008, University of Cambridge, Medical Research Council 
% Maintained by Tom Walters ([e-mail]), written by Stefan Bleeck ([e-mail])
% http://www.pdn.cam.ac.uk/cnbh/aim2006
% $Date: 2008-06-10 18:00:16 +0100 (Tue, 10 Jun 2008) $
% $Revision: 585 $

function linsig=linsigx(sig)
% usage: linsig=linsigx(sig)
% transferes the signal from a signal that is in logarithmic scale
% to a signal, that is in linear scale.
% reverser operation from logsinx
%
% this is a little bit tricky since we cant take the times as measure for
% the logarithmic part. We therefore take the labels, which must be defined
% properly!

if length(sig.x_tick_labels) > 0
    tmin=sig.x_tick_labels(1)/1000;
    tmax=sig.x_tick_labels(end)/1000;
%     tmin=sig.x_tick_labels(1);
%     tmax=sig.x_tick_labels(end);
else
    error('signal::linsig: definie x labels of signal');
end

nr_points=getnrpoints(sig);

oldvals=getvalues(sig);
newvals=zeros(nr_points,1);


% [ntimes,scaleinfo]=distributelogarithmic(tmin,tmax,nr_points);
ntimes=linspace(tmin,tmax,nr_points);
mtimes=f2f(ntimes,0.001,0.035,0.001,0.035,'loglin');
% mtimes=f2f(ntimes,tmin,tmax,tmin,tmax,'loglin');
newvals=gettimevalue(sig,mtimes);

sr=nr_points/(tmax-tmin);
linsig=signal(newvals,sr);    % copy all values
linsig=setstarttime(linsig,tmin);