Learn how easy it is to sync an existing GitHub or Google Code repo to a SourceForge project! See Demo

Close

[90d51d]: inst / tfe.m Maximize Restore History

Download this file

tfe.m    58 lines (53 with data), 2.0 kB

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
## Copyright (C) 2006 Peter V. Lanspeary <pvl@mecheng.adelaide.edu.au>
##
## This program is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free Software
## Foundation; either version 3 of the License, or (at your option) any later
## version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
## details.
##
## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.
## Usage:
## [Pxx,freq] = tfe(x,y,Nfft,Fs,window,overlap,range,plot_type,detrend)
##
## Estimate transfer function of system with input "x" and output "y".
## Use the Welch (1967) periodogram/FFT method.
## Compatible with Matlab R11 tfe and earlier.
## See "help pwelch" for description of arguments, hints and references
## --- especially hint (7) for Matlab R11 defaults.
function varargout = tfe(varargin)
##
## Check fixed argument
if ( nargin<2 )
error( 'tfe: Need at least 2 args. Use help tfe.' );
endif
nvarargin = length(varargin);
## remove any pwelch RESULT args and add 'trans'
for iarg=1:nvarargin
arg = varargin{iarg};
if ( ~isempty(arg) && ischar(arg) && ( strcmp(arg,'power') || ...
strcmp(arg,'cross') || strcmp(arg,'trans') || ...
strcmp(arg,'coher') || strcmp(arg,'ypower') ))
varargin{iarg} = [];
endif
endfor
varargin{nvarargin+1} = 'trans';
##
saved_compatib = pwelch('R11-');
if ( nargout==0 )
pwelch(varargin{:});
elseif ( nargout==1 )
Pxx = pwelch(varargin{:});
varargout{1} = Pxx;
elseif ( nargout>=2 )
[Pxx,f] = pwelch(varargin{:});
varargout{1} = Pxx;
varargout{2} = f;
endif
pwelch(saved_compatib);
endfunction