Possible Duplicate:
Linear trend has to pass through a point
I need to interpolate a linear trend surface through a number of points but with the condition that the surface has to pass exactly through one of them. Can somebody give me any advice?
Possible Duplicate:
Linear trend has to pass through a point
I need to interpolate a linear trend surface through a number of points but with the condition that the surface has to pass exactly through one of them. Can somebody give me any advice?