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wlognrnd

PURPOSE ^

Random matrices from a Lognormal distribution.

SYNOPSIS ^

R = wlognrnd(mu,v,varargin);

DESCRIPTION ^

 WLOGNRND Random matrices from a Lognormal distribution.
 
  CALL:  R = wlognrnd(mu,v,sz);
 
      mu, v = parameters (see wlognpdf) (Default 0 and 1, respectively)
         sz = size(R)    (Default common size of mu and v)
              sz can be a comma separated list or a vector 
              giving the size of R (see zeros for options).
  Example:
    R = wlognrnd(1,2,100,2);
    wnormplot(log(R))
 
  See also  wlogninv, wnormrnd, wlognpdf

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

001 function R = wlognrnd(mu,v,varargin);
002 %WLOGNRND Random matrices from a Lognormal distribution.
003 %
004 % CALL:  R = wlognrnd(mu,v,sz);
005 %
006 %     mu, v = parameters (see wlognpdf) (Default 0 and 1, respectively)
007 %        sz = size(R)    (Default common size of mu and v)
008 %             sz can be a comma separated list or a vector 
009 %             giving the size of R (see zeros for options).
010 % Example:
011 %   R = wlognrnd(1,2,100,2);
012 %   wnormplot(log(R))
013 %
014 % See also  wlogninv, wnormrnd, wlognpdf
015 
016 % Reference: Cohen & Whittle, (1988) "Parameter Estimation in Reliability
017 % and Life Span Models", p. 59 ff, Marcel Dekker.
018 
019 
020 
021 % Tested on; Matlab 5.3
022 % History: 
023 % revised pab 23.10.2000
024 %  - added comnsize, nargchk
025 %  - added greater flexibility on the sizing of R
026 % added ms 10.08.2000
027 
028 
029 error(nargchk(2,inf,nargin))
030 if nargin<1|isempty(mu),mu=0;end
031 if nargin<2|isempty(v), v=1;end
032 
033 if nargin<3,
034   [errorcode mu v] = comnsize(mu,v);
035 else
036   [errorcode mu v] = comnsize(mu,v,zeros(varargin{:}));
037 end
038 if errorcode > 0
039     error('mu and v must be of common size or scalar.');
040 end
041 
042 R = exp(wnormrnd(mu,v));
043 
044

Mathematical Statistics
Centre for Mathematical Sciences
Lund University with Lund Institute of Technology

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