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diff --git a/math/iminterp/doc/msigrid.hlp b/math/iminterp/doc/msigrid.hlp new file mode 100644 index 00000000..6bc110d5 --- /dev/null +++ b/math/iminterp/doc/msigrid.hlp @@ -0,0 +1,51 @@ +.help msigrid Dec98 "Image Interpolation Package" +.ih +NAME +msigrid -- evaluate the interpolant on a grid of points +.ih +SYNOPSIS +msigrid (msi, x, y, zfit, nx, ny, len_zfit) + +.nf + pointer msi #I interpolant descriptor + real x[2*nx] #I x values, 1 <= x[i] <= nx + real y[2*ny] #I y values, 1 <= y[i] <= ny + real zfit[len_zfit,ARB] #O grid of interpolated values + int nx #I number of x points + int ny #I number of y points + int len_zfit #I length zfit, len_zfit >= nx +.fi +.ih +ARGUMENTS +.ls msi +Pointer to the interpolant descriptor structure. +.le +.ls x, y +The x and y arrays of points to be evaluated, or in the case of the drizzle +interpolant the x and y ranges over which the points are to be evaluated. +The x and y arrays must be ordered in increasing values of x and y respectively. +.le +.ls zfit +The array of interpolated points. +.le +.ls nx, ny +The number of points in the x and y directions respectively. +.le +.ls len_zfit +The row length of the zfit array. Len_zfit >= nx. +.le +.ih +DESCRIPTION +MSIGRID evaluates the interpolant at a set of x and y values on a +rectangular grid or in the case of the drizzle interpolant within +rectangular regions. It is most efficient for evaluating the interpolant +at many values which are closely spaced in x and y. For widely spaced +points MSIVECTOR should be used. +.ih +NOTES +Checking for out of bounds and INDEF valued pixels is the responsibility +of the user. +.ih +SEE ALSO +msieval, msivector, msider, mrieval, mrider +.endhelp |