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Serie Properties

DM2000 has powerful graphic engine that can display not only raw numeric data, but arbitrary functions calculated dynamically without actual data changes. There's two types of series: data and functional. Data series must be associated with worksheet and display worksheet data. Functional series don't use numeric data; instead, points coordinates are calculated. X coordinates belong linear grid ranged from X_min to X_max and divided into selected number of equal intervals, Y coordinates defined as a result of evaluation of Y expression at the X grid nodes. Note that Y expression for functional series MUST depend only on X, hence, the only allowed parameter in Y expression will be cx. Also note that X axis expression does not affect on the functional series (Y axis expression does). See expression syntax for more details about available functions and operators.

Serie Properties dialog box should be used to change various parameters of the selected serie, grouped on three tabs: Data, View and Info.

Data properties:

• X data source - select the source of X coordinates of the curve points. You can define single column, arbitrary expression evaluated on column values or linear grid for functional series.
• Y data source - you have the same choices except linear grid. Note that both X and Y columns must not be empty (unselected); otherwise this serie will not be displayed.
• Select worksheet to be associated with this serie, and a first and last lines in the selected worksheet. If worksheet is not selected, or first line is greater than last line, or equal to -1, serie is treated as empty and will not be displayed.

View properties:

• Show points - check this flag and define point attributes if you want to display points on the plot curve.
• Show lines - check this flag and define line properties if you want to connect curve points with lines. If you uncheck both flags the serie will be not empty, but invisible. For your convenience, there's curve preview at this tab.
• Caption - like column caption, the plot serie can have associated text string that should be used as a description.

Info properties:

• Show best fit line - check this flag to display linear least-squares fit. Fit expression is also available. DM2000 has separate and much more powerful linear and NLSF fitters.
• Data limits - when serie is plotting, X and Y coordinate ranges (as well as linear "best fit line" coefficients) are automatically calculated. You can copy these ranges to the plot axes or selection ranges. Note that these values are undefined before serie is displayed (at least for the first time). This is true in case of empty or functional series.

Note that if data range is invalid (for example, you select third column (D), but worksheet has only two non-empty columns), or an error occurred when serie expression(s) are evaluated, the data sources will be automatically cleared (so serie will be marked as empty and not plotted), and appropriate error message will be displayed in the status bar.

Use context-sensitive help (F1 key and [?] button) to get more detailed information about controls.