Piega 1.6 user manual Graphing Readings, Viewing a Graph

At the top of the list window is a menu, which allows you to specify how data is grouped. There are five options:

View ungrouped	Select this option to view the values in a list, which can be sorted
	by any of the column headings.
Group by Product	Select this option to display a separate sub-list of readings for
	each product.
Group by Process/Location	Select this option to display a separate sub-list of readings for
	each process/location.
Group by User	Select this option to display a separate sub-list of readings
	performed by each user.
Group by Year:Month	Select this option to display a separate sub-list of readings for
	each month.

Graphing Readings

You can create a graph of the readings with the Graph button at the top of the list window (next to the grouping menu). First choose a grouping of the data with the grouping menu, and then click the Graph button. The graph is displayed in a new graph window. The grouping you choose affects the units of the x-axis. For example, if you graphed readings that were grouped by process/location, the x-axis would include all of the processes/locations in the graphed data.

You can graph a subset of the data by clicking and dragging the mouse over the data you want to graph, or clicking on individual rows, in the list window, before clicking Graph.

Viewing a Graph

When viewing a graph, you can zoom in on a certain part of the graph by clicking and dragging a rectangle. The area inside the rectangle you defined will enlarge to fill the window.

The Y-axis can display either numbers of readings, or alternatively, percentages. The button in the top left of the graph view determines whether the percentages or number of readings will be displayed on the (vertical) Y-axis. When this button is down percentages will be displayed; otherwise numbers of readings will be displayed.

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