9.3.7.4 The (Plot Details) Display Tab(Plot Elements to Show)

PD-Dialog-PlotLevel-Display-Tab

The controls on the Display tab at Plot level is only available for general cartesian 2D plots or 3D XYY bar plots.

• 2D Graphs: Line, Scatter, Line + Symbol, Area; Box, Histogram, 3D XYY Walls/Ribbons/Waterfall
  

• 3D Graphs: 3D XYZ Bar, 3D Scatter graph
  

• 2D Graphs: Column, Bar
  

• 3D Graphs: 3D YY Bar
  

Plot Data on

As Origin supports double Y axes in 2D graph and double Y/Z axes in 3D graph, you can use this option to specify which axis the current plot bases on.

For 2D graph and 3D XYY/XYZ graph, by default, all plots will be plotted on the left Y/Z axis(exclude those plotted from the specific templates). You can use this radio box to decide which Y/Z axis the current plot should be plotted on. For example, if Right Y/Z Axis is choosen, the current plot will be plotted on the right Y/Z axis, the axis scale will auto-adjust to include the whole data range; and vice versa.

Note: If you want to plot 2D and 3D stacked bar plot with subgrouping by axis, check Offset within Subgroup( in Group tab ) for Cumulative/Incremental and set Subgrouping to By Axis, and then use this Plot Data on radio box to set different axis for each bar plot.

Bar

Once you created a 2D or 3D YY bar/column plot, this check box will be checked by default. You can use this check box to turn off the bar display in the graph.

Symbol

Specify whether to show symbols at the top middle of the 2D/3D bars/columns.

Connect Line

Specify whether show the connect lines to connect the midpoints of each bars in a plot. Once you selected this check box, the Line tab will show up to let you do subsequent line style settings.

For 2D bar chart, the color of connect line will automatically follow the border color of the bars by default.

For 3D XYY bar chart, the color of connect line will automatically follow the pattern fill of 3D bar by default.

If there are subsets in your 2D bar graph, in the Line tab, the Connect within Subset check box will be checked by default to add connect lines within the subset.

Example Plots:

• 2D Column Chart with connect line and symbols

  

• 3D XYY Bars with connect line

  

Drop Lines

Specify whether to add drop lines from the midpoints at top of the bars to the bottom axis or bottom panel. Once you added drop lines for the bars, the Drop Lines tab will show up to let you customize the drop lines.

Bar Projection in XZ Plane with Y =

Specify whether show the projection of 3D XYY bar in XZ plane and the position(Y=) of the projection bar. By default, Auto is selected, which means the projection bars will be plotted at Y= Axis Begin.

Note: In this sample, the 3D Bar start from Y=-1500, so the projection bars at XZ plane started from Z=-1500 too. The XY plane which the projection bars are in, is at the position Y= .

Data Points Display Control

Specify whether and how to skip data points when show the drop lines.

No Skipping Points

All data points will have their own droplines, without any skipping point. This is the default seletction for this control group.

Skip Points by Increment

Select the Skip Points by Increment from the dropdown list to display a specified frequency of data points, then type the frequency in the associated text box. This setting also effects the display of the data plot drop lines, symbols, error bars, and data labels. For a vector plot, the vectors will be hidden as well when scatter point is skipped. For projection of 3D Scatter, the skip points options will be hidden and the projection will skip points bt following the settings of original plot.

If n is entered in the Skip Points text box, then only the first out of every n data points will be displayed; the remaining n-1 data points will be skipped. But the last data point will always show. If you want to hide the last point, set @SMEP = 0. n must be an integer value greater than or equal to 2. If n = 0 or 1, no point is skipped.

No Line Break for Skipped Point(s)

If Gap to Symbol is checked for a Line+Symbol plot, No Line Break for Skipped Point(s) check box will show to let you specify whether to break the line if points are skipped. If this is selected, the line will still be continuous even though the data points are skipped.

Smart Skip

Select one of the Smart Skip options, to skip the data points with a smart caculation based on the data density abd curve shape.

Smart Skip(Total Points Kept)

Smart skip the data points by specifying the total data points kept after skipping.

Smart Skip(% of Points Skipped)

Smart skip the data points by specifying how many data points will be skiped with a percentage of all data points.

Smart Skip Method

Based on the different curve shape and data density, there are four methods selectable to skip the data points:

• Largest Triangle: Find a point near the midpoint, this point(1) should be the largest triangle in area with the start point and end point. Then, point 1 will divide the whole curve to two segments, each segment will do the same calculation as that of finding point 1 to find point 2 and point 3. Compare the triangle area of point 2 and point 3 in their segment, keep the one which has the larger area.
  

Follow this algorithm to search step by step, each time only the point with the largest triangular area (between the current larger-area triangle and the higher-level smaller triangle) is kept until the set number of points is reached.

• Y-threshold: According to the number of points you want to find, calculate a threshold on Y axis distance using the iterative method; Then, keep the points under the threshold. Note: 3D Scatter does not support "Y-threshold" method.
• Data Distance Threshold: According to the number of points you want to find, calculate a threshold with larger triangle area using the iterative method; Then, keep the points under the threshold.
• Douglas Peucker Hull: Use the Douglas–Peucker algorithm to decimate a curve composed of line segments to a similar curve with fewer points.
• Largest Triangle for Segments: Divide the curve into several segments, and then follow the largest triangle algorithm to find the points. Each segment will find some number of data points.