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16. Moving a Break Point

To move a break point, select the Move option from the Break Point menu or the crosshairs on the tool bar. The cursor will change into a cross hairs shape. Move the cursor over the break point on the input data plot to be moved. Click and drag the mouse to the new location and the break point will be deposited when the mouse button is released. If more than one break point is at the original screen location then the point for the first station in the list will be moved. To ensure which station break point gets moved, hide all other stations from the plot and then select the break point to be moved.

For MAT data, moving a break point from one date to another will occur in both the minimum and maximum temperature plots.

The effect of moving a break point is that the segments before and after the break point have their range changed, but the correction factors for the segments stay the same. For example:

Before moving the break point j:

Segment IdStarting PointEnding PointCorrection Factor
1ijcf1
2jkcf2
3klcf3

After moving the break point j:

Segment IdStarting PointEnding PointCorrection Factor
1i new jcf1
2new jkcf2
3klcf3

Only one break point can be moved at a time. To move another break point, the user must select the Move option again.

The order of doing add(s), delete(s) and/or move(s) will result in different correction factors for the same final segments if correction factors are not recalculated for all segments that are effected by the operations. See Appendix 2 for more details.


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Page Author: OHD webmaster
Page last modified: August 24, 2006
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