Quantity Column

If you are measuring a large number of features, you may wish to record single data entries which refer to several identical features having the same orientation. For this purpose, you may include a Quantity Column in your Dips file, by selecting the Quantity Column checkbox in the Project Settings dialog.

The Quantity Column allows you to enter values corresponding to the number of identical features represented by a particular measurement. The Quantity Column values are used in the generation of scatter , contour and rosette plots in Dips, and also in mean vector calculations for sets.

Quantity Column Values

• For convenience, the values in the Quantity Column are initially set to 1 when the column is created. The user can then enter higher values as necessary (e.g., 2, 3, 4, ...).
• Although the values in the Quantity Column are generally 1 or greater, the value may be set to zero if you wish to plot a feature on a pole plot, but NOT use it in the computation of the scatter or contour plots.
• It is possible for the Quantity Column to contain non-integer values (for example, when a processed data file is saved, the user has the option of multiplying the values in the Quantity Column by the Terzaghi Weighting, in order to preserve the bias correction information in the processed file).

Quantity Column Position

The position of the Quantity Column, if it exists, is always the THIRD column in the spreadsheet (i.e. the first column AFTER the two orientation columns).

Adding / Removing the Quantity Column

• The Quantity Column can only be added or removed from the spreadsheet through the Project Settings dialog.
• The Add Column / Remove Column options in the Edit menu cannot be used to create or remove the Quantity Column.