Designating Point References

Most macros need a reference to a position in one of dimensions. In the simple case this can be a single row or column number. In other cases, however, it is benificial to use a range of rows or columns in calculation.

Drawing of a baseline in a noisy spectrum is an example: noise variation at the desired pixel may be large enough to cause significant baseline errors. By averaging values of several points niose contribution may be significantly reduced.

Depending on specific needs, one can specify either a frame or a range of points.

To designate a frame of points specify the center position and a half-frame from that position. Points in from {center position - half-frame} to {center position + half-frame} will be used. When half-frame is set to zero a frame is reduced to a point (center position).

To designate a range simply specify from which point or value to which point of value to average data.