diff options
Diffstat (limited to 'math/surfit/doc/islrefit.hlp')
| -rw-r--r-- | math/surfit/doc/islrefit.hlp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/math/surfit/doc/islrefit.hlp b/math/surfit/doc/islrefit.hlp new file mode 100644 index 00000000..c34476d6 --- /dev/null +++ b/math/surfit/doc/islrefit.hlp @@ -0,0 +1,51 @@ +.help islrefit Aug85 "Gsurfit Package" +.ih +NAME +islrefit -- refit surface grid line assuming old cols, w vector +.ih +SYNOPSIS +include <math/surfit.h> + +islrefit (sf, cols, lineno, z, w) + +.nf +pointer sf # surface grid descriptor +int cols[ARB] # columns to be fit, 1 <= cols[i] <= ncols +int lineno # line number of surface grid line to be fit +real z[ARB] # array of data values +real w[ARB] # array of weights +.fi +.ih +ARGUMENTS +.ls sf +Pointer to the surface grid descriptor structure. +.le +.ls cols +The column numbers of the surface grid line to be added to the dataset. +.le +.ls lineno +The number of the surface grid line to be added to the dataset. +.le +.ls z +Array of data values. +.le +.ls w +Array of weights. +.le +.ih +DESCRIPTION +In some applications the cols, and w values remain unchanged from fit +to fit and only the z values vary. In this case it is redundant to +reaccumulate the matrix and perform the Cholesky factorization for each +succeeding surface grid line. ISLREFIT +zeros and reaccumulates the vector on the right hand side of the matrix +equation and performs the forward and back substitution phase to fit for +a new coefficient vector. +.ih +NOTES +It is the responsibility of the calling program to check for out of bounds +column values and INDEF valued pixels. +.ih +SEE ALSO +isinit, islfit, islaccum, islsolve, islzero, issolve, isfree +.endhelp |