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Large Datasets
ēKoView attempts to display large datasets which can be accumulated over long time ranges in a
meaningful manner to the user. To do this, ēKoView uses aggregated data for charts that span
long time ranges. The aggregate data is displayed as an average over a time range with a
minimum and maximum value. Users can view the detailed data of an aggregate by specifying a
shorter date range which encompasses that data point.
Charting date ranges less than 14 days displays detailed data for every point.
Charting date ranges between 14 days and 94 days are displayed as hourly aggregates of
the data.
Charting date ranges between 94 days and 300 days are displayed as 6 hour aggregates of
the data.
Charting date ranges between 300 days and 900 days are displayed as daily aggregates of
the data.
Charting date ranges over 900 days and 9000 days are displayed as 10-day aggregates of
the data.
Charting date range greater than 9000 days is displayed as 30-day aggregates of the data.
Plot Type
When displaying data, the user can choose one of six plot types:
Graph
. Line plots connect a line between the individual data points, attempting to interpolate the
trend being displayed. Point plots display each data value as a point with not connections. The
High-Low plots display each data value as a bar ranging between its maximum and minimum
value. Finally, Bucket graph displays accumulated change over specified bucket size (eg. daily,
weekly monthly) for certain agricultural calculations (eg. Chill hours, Degree days, Powdery
Mildew) and average value over specified bucket size for the sensor values.
The data values plotted for a particular chart depends on the whether a detailed or aggregate data
point is displayed. When displaying detailed data the Line and Point plots display the actual data
value. Since detailed data does not have a maximum and minimum value (like aggregate data),
the High-Low plot displays as a Point plot for detailed data values.
When displaying aggregate data the Line and Point plots display the average value of the
aggregate point over that time. The minimum and maximum value for the aggregate is displayed
when the mouse is held over a point. The High-Low plot displays a bar representing the
maximum and minimum value over that time range. The average value is displayed when the
mouse is held over the bar.
6.3.4 Modifying a chart
Once a chart has been created, user can modify the current chart. When the user clicks on the
Modify Chart
button, Modify an Existing Chart dialog is displayed to the user. User can change
the desired chart parameters and click on
Doc. # 7430-0710-01 Rev. C
OK
.
Line
Point
High Low,
,
,
or
Bucket
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