utils/matlab/stats.m

function [varargout] = stats(A)
% stats(A) writes the basic statistics of the A to the terminal which
% are i) the minimum finite value
%    ii) the maximum finite value
%   iii) the mean of the finite values
%    iv) the S.D. of the finite values ( RMS of [A-mean] )
%     v) the fraction of non-finite elements excluded from calculations
%
% e.g.
%  >> stats(topo)
% Min -4555     Max 0         Mean -2331.07  SD 1207.3441   N-Z 1024/1024
%
% [Min Max Mean SD]=stats(topo); returns the statistics in Min, Max,
% Mean and SD and does not write to the terminal.

% $Header: /u/gcmpack/MITgcm/utils/matlab/stats.m,v 1.4 2004/06/04 17:03:50 adcroft Exp $
% $Name:  $

A=A(:);

%ii=find(A~=0);
ii=find(isfinite(A));
if isempty(ii)
 ii=1;
end
sZ=prod(size(A));
minA=min(A(ii));
maxA=max(A(ii));
meanA=mean(A(ii));
sdA=sqrt( mean( (A(ii)-meanA).^2 ) );
rmsA=sqrt( mean( A(ii).^2 ) );
nZ=sum(~isfinite(A));
switch max(nargout)
 case {0}
% disp( ...
%  sprintf('Min %0.5g  Max %0.5g  Mean %0.5g  SD %0.5g   NaN %i/%i',...
%        minA,maxA,meanA,sdA,nZ,sZ) );
  disp( ...
   sprintf('Min %0.5g  Max %0.5g  Mean %0.5g  RMS %0.5g   NaN %i/%i',...
         minA,maxA,meanA,rmsA,nZ,sZ) );
 case {1}
  varargout(1)={minA};
 case {2}
  varargout(1)={minA};
  varargout(2)={maxA};
 case {3}
  varargout(1)={minA};
  varargout(2)={maxA};
  varargout(3)={meanA};
 case {4}
  varargout(1)={minA};
  varargout(2)={maxA};
  varargout(3)={meanA};
  varargout(4)={sdA};
 otherwise
  error('Too many return arguments requested')
end
1	function [varargout] = stats(A)
2	% stats(A) writes the basic statistics of the A to the terminal which
3	% are i) the minimum finite value
4	% ii) the maximum finite value
5	% iii) the mean of the finite values
6	% iv) the S.D. of the finite values ( RMS of [A-mean] )
7	% v) the fraction of non-finite elements excluded from calculations
8	%
9	% e.g.
10	% >> stats(topo)
11	% Min -4555 Max 0 Mean -2331.07 SD 1207.3441 N-Z 1024/1024
12	%
13	% [Min Max Mean SD]=stats(topo); returns the statistics in Min, Max,
14	% Mean and SD and does not write to the terminal.
15
16	% $Header: /u/gcmpack/MITgcm/utils/matlab/stats.m,v 1.4 2004/06/04 17:03:50 adcroft Exp $
17	% $Name: $
18
19	A=A(:);
20
21	%ii=find(A~=0);
22	ii=find(isfinite(A));
23	if isempty(ii)
24	ii=1;
25	end
26	sZ=prod(size(A));
27	minA=min(A(ii));
28	maxA=max(A(ii));
29	meanA=mean(A(ii));
30	sdA=sqrt( mean( (A(ii)-meanA).^2 ) );
31	rmsA=sqrt( mean( A(ii).^2 ) );
32	nZ=sum(~isfinite(A));
33	switch max(nargout)
34	case {0}
35	% disp( ...
36	% sprintf('Min %0.5g Max %0.5g Mean %0.5g SD %0.5g NaN %i/%i',...
37	% minA,maxA,meanA,sdA,nZ,sZ) );
38	disp( ...
39	sprintf('Min %0.5g Max %0.5g Mean %0.5g RMS %0.5g NaN %i/%i',...
40	minA,maxA,meanA,rmsA,nZ,sZ) );
41	case {1}
42	varargout(1)={minA};
43	case {2}
44	varargout(1)={minA};
45	varargout(2)={maxA};
46	case {3}
47	varargout(1)={minA};
48	varargout(2)={maxA};
49	varargout(3)={meanA};
50	case {4}
51	varargout(1)={minA};
52	varargout(2)={maxA};
53	varargout(3)={meanA};
54	varargout(4)={sdA};
55	otherwise
56	error('Too many return arguments requested')
57	end