[sdotresult,n,sx,incx,sy,incy]=sdot(n,sx,incx,sy,incy);

function [sdotresult,n,sx,incx,sy,incy]=sdot(n,sx,incx,sy,incy);
sdotresult=[];
persistent i ix iy m mp1 ns ; 

;
if isempty(i), i=0; end;
if isempty(ix), ix=0; end;
if isempty(iy), iy=0; end;
if isempty(m), m=0; end;
if isempty(mp1), mp1=0; end;
if isempty(ns), ns=0; end;
%***BEGIN PROLOGUE  SDOT
%***PURPOSE  Compute the inner product of two vectors.
%***LIBRARY   SLATEC (BLAS)
%***CATEGORY  D1A4
%***TYPE      SINGLE PRECISION (SDOT-S, DDOT-D, CDOTU-C)
%***KEYWORDS  BLAS, INNER PRODUCT, LINEAR ALGEBRA, VECTOR
%***AUTHOR  Lawson, C. L., (JPL)
%           Hanson, R. J., (SNLA)
%           Kincaid, D. R., (U. of Texas)
%           Krogh, F. T., (JPL)
%***DESCRIPTION
%
%                B L A S  Subprogram
%    Description of Parameters
%
%     --Input--
%        N  number of elements in input vector(s)
%       SX  single precision vector with N elements
%     INCX  storage spacing between elements of SX
%       SY  single precision vector with N elements
%     INCY  storage spacing between elements of SY
%
%     --Output--
%     SDOT  single precision dot product (zero if N .LE. 0)
%
%     Returns the dot product of single precision SX and SY.
%     SDOT = sum for I = 0 to N-1 of  SX(LX+I*INCX) * SY(LY+I*INCY),
%     where LX = 1 if INCX .GE. 0, else LX = 1+(1-N)*INCX, and LY is
%     defined in a similar way using INCY.
%
%***REFERENCES  C. L. Lawson, R. J. Hanson, D. R. Kincaid and F. T.
%                 Krogh, Basic linear algebra subprograms for Fortran
%                 usage, Algorithm No. 539, Transactions on Mathematical
%                 Software 5, 3 (September 1979), pp. 308-323.
%***ROUTINES CALLED  (NONE)
%***REVISION HISTORY  (YYMMDD)
%   791001  DATE WRITTEN
%   890831  Modified array declarations.  (WRB)
%   890831  REVISION DATE from Version 3.2
%   891214  Prologue converted to Version 4.0 format.  (BAB)
%   920310  Corrected definition of LX in DESCRIPTION.  (WRB)
%   920501  Reformatted the REFERENCES section.  (WRB)
%***end PROLOGUE  SDOT
sx_shape=size(sx);sx=reshape(sx,1,[]);
sy_shape=size(sy);sy=reshape(sy,1,[]);
%***FIRST EXECUTABLE STATEMENT  SDOT
sdotresult = 0.0e0;
if( n<=0 )
sx_shape=zeros(sx_shape);sx_shape(:)=sx(1:numel(sx_shape));sx=sx_shape;
sy_shape=zeros(sy_shape);sy_shape(:)=sy(1:numel(sy_shape));sy=sy_shape;
csnil=dbstack(1); csnil=csnil(1).name(1)~='@';
if csnil&&~isempty(inputname(4)), assignin('caller','FUntemp',sy); evalin('caller',[inputname(4),'=FUntemp;']); end
if csnil&&~isempty(inputname(2)), assignin('caller','FUntemp',sx); evalin('caller',[inputname(2),'=FUntemp;']); end
if csnil&&~isempty(inputname(1)), assignin('caller','FUntemp',n); evalin('caller',[inputname(1),'=FUntemp;']); end
if csnil&&~isempty(inputname(5)), assignin('caller','FUntemp',incy); evalin('caller',[inputname(5),'=FUntemp;']); end
if csnil&&~isempty(inputname(3)), assignin('caller','FUntemp',incx); evalin('caller',[inputname(3),'=FUntemp;']); end
return;
end;
if( incx==incy )
if( incx<1 )
elseif( incx==1 ) ;
%
%     Code for both increments equal to 1.
%
%     Clean-up loop so remaining vector length is a multiple of 5.
%
m = fix(rem(n,5));
if( m~=0 )
for i = 1 : m;
sdotresult = sdotresult + sx(i).*sy(i);
end; i = fix(m+1);
if( n<5 )
sx_shape=zeros(sx_shape);sx_shape(:)=sx(1:numel(sx_shape));sx=sx_shape;
sy_shape=zeros(sy_shape);sy_shape(:)=sy(1:numel(sy_shape));sy=sy_shape;
csnil=dbstack(1); csnil=csnil(1).name(1)~='@';
if csnil&&~isempty(inputname(4)), assignin('caller','FUntemp',sy); evalin('caller',[inputname(4),'=FUntemp;']); end
if csnil&&~isempty(inputname(2)), assignin('caller','FUntemp',sx); evalin('caller',[inputname(2),'=FUntemp;']); end
if csnil&&~isempty(inputname(1)), assignin('caller','FUntemp',n); evalin('caller',[inputname(1),'=FUntemp;']); end
if csnil&&~isempty(inputname(5)), assignin('caller','FUntemp',incy); evalin('caller',[inputname(5),'=FUntemp;']); end
if csnil&&~isempty(inputname(3)), assignin('caller','FUntemp',incx); evalin('caller',[inputname(3),'=FUntemp;']); end
return;
end;
end;
mp1 = fix(m + 1);
for i = mp1 : 5: n ;
sdotresult = sdotresult + sx(i).*sy(i) + sx(i+1).*sy(i+1) + sx(i+2).*sy(i+2)+ sx(i+3).*sy(i+3) + sx(i+4).*sy(i+4);
end; i = fix(n +1);
sx_shape=zeros(sx_shape);sx_shape(:)=sx(1:numel(sx_shape));sx=sx_shape;
sy_shape=zeros(sy_shape);sy_shape(:)=sy(1:numel(sy_shape));sy=sy_shape;
csnil=dbstack(1); csnil=csnil(1).name(1)~='@';
if csnil&&~isempty(inputname(4)), assignin('caller','FUntemp',sy); evalin('caller',[inputname(4),'=FUntemp;']); end
if csnil&&~isempty(inputname(2)), assignin('caller','FUntemp',sx); evalin('caller',[inputname(2),'=FUntemp;']); end
if csnil&&~isempty(inputname(1)), assignin('caller','FUntemp',n); evalin('caller',[inputname(1),'=FUntemp;']); end
if csnil&&~isempty(inputname(5)), assignin('caller','FUntemp',incy); evalin('caller',[inputname(5),'=FUntemp;']); end
if csnil&&~isempty(inputname(3)), assignin('caller','FUntemp',incx); evalin('caller',[inputname(3),'=FUntemp;']); end
return;
else;
%
%     Code for equal, positive, non-unit increments.
%
ns = fix(n.*incx);
for i = 1 : incx: ns ;
sdotresult = sdotresult + sx(i).*sy(i);
end; i = fix(ns +1);
sx_shape=zeros(sx_shape);sx_shape(:)=sx(1:numel(sx_shape));sx=sx_shape;
sy_shape=zeros(sy_shape);sy_shape(:)=sy(1:numel(sy_shape));sy=sy_shape;
csnil=dbstack(1); csnil=csnil(1).name(1)~='@';
if csnil&&~isempty(inputname(4)), assignin('caller','FUntemp',sy); evalin('caller',[inputname(4),'=FUntemp;']); end
if csnil&&~isempty(inputname(2)), assignin('caller','FUntemp',sx); evalin('caller',[inputname(2),'=FUntemp;']); end
if csnil&&~isempty(inputname(1)), assignin('caller','FUntemp',n); evalin('caller',[inputname(1),'=FUntemp;']); end
if csnil&&~isempty(inputname(5)), assignin('caller','FUntemp',incy); evalin('caller',[inputname(5),'=FUntemp;']); end
if csnil&&~isempty(inputname(3)), assignin('caller','FUntemp',incx); evalin('caller',[inputname(3),'=FUntemp;']); end
return;
end;
end;
%
%     Code for unequal or nonpositive increments.
%
ix = 1;
iy = 1;
if( incx<0 )
ix =fix((-n+1).*incx + 1);
end;
if( incy<0 )
iy =fix((-n+1).*incy + 1);
end;
for i = 1 : n;
sdotresult = sdotresult + sx(ix).*sy(iy);
ix = fix(ix + incx);
iy = fix(iy + incy);
end; i = fix(n+1);
sx_shape=zeros(sx_shape);sx_shape(:)=sx(1:numel(sx_shape));sx=sx_shape;
sy_shape=zeros(sy_shape);sy_shape(:)=sy(1:numel(sy_shape));sy=sy_shape;
csnil=dbstack(1); csnil=csnil(1).name(1)~='@';
if csnil&&~isempty(inputname(4)), assignin('caller','FUntemp',sy); evalin('caller',[inputname(4),'=FUntemp;']); end
if csnil&&~isempty(inputname(2)), assignin('caller','FUntemp',sx); evalin('caller',[inputname(2),'=FUntemp;']); end
if csnil&&~isempty(inputname(1)), assignin('caller','FUntemp',n); evalin('caller',[inputname(1),'=FUntemp;']); end
if csnil&&~isempty(inputname(5)), assignin('caller','FUntemp',incy); evalin('caller',[inputname(5),'=FUntemp;']); end
if csnil&&~isempty(inputname(3)), assignin('caller','FUntemp',incx); evalin('caller',[inputname(3),'=FUntemp;']); end
return;
end
%DECK SDPSC