Vernier Original LabQuest - Manual (Page 15)

LabQuest Reference
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There are several important shortcuts on the Graph screen. After collecting data, tap on the
graph itself to read values from the examine cursors. Read values in the readouts to the right.
Tap the file cabinet icon to store a run; choose between stored runs with the menu to the
left of the cabinet icon.
Graph Menu
In the Graph menu itself, you can choose what is plotted, how the graph is scaled, choose
point protectors or connecting lines, and choose data to ignore by striking through the
values. You can choose to display two smaller graphs if desired.
Graph Options
For full control over how the data are graphed, choose
Graph Options. Here you can choose the columns used
for the x- and y-axes and the top/bottom and left/right
limits. Selecting Autoscale will cause the graph range to
adjust to the data range after data collection ends.
Autoscale from 0 does the same, but includes the
origin. Manual scaling will respect values entered in the
range limits, unless incoming data falls outside the
range. In this case the range will expand to include the
data. To enter range limits, tap in each field and use the keyboard to enter numeric values.
Dismiss the keyboard by tapping the keyboard icon.
The Point Protectors option will mark some, but not all, of the points with a mark such as a
circle or diamond. This allows easy identification of a trace by the corresponding mark in the
graph legend. On by default, turning off the point protectors may be desirable if only one
trace is being viewed.
The Connect Points option connects data points with straight-line segments. These lines
help the eye follow the data trend, but in some cases are not appropriate. On by default,
unchecking Connect Points will leave only the actual points on the graph.
Columns being graphed on the y-axis are checked. If multiple runs are present, you can
quickly choose which runs are plotted by tapping to place checkmarks in the runs you want
to see.
LabQuest can display either one or two graphs. The two graphs share a common x-axis
column and range. Tap the diamond next to Graph 1 Y-Axis or Graph 2 Y-Axis to show or
hide the settings for that-axis. If no column is selected for Graph 2, only one graph will be
drawn.
When you are done setting Graph Options, tap OK to return to the Graph screen.
Show Graph
The Show Graph menu item lets you quickly jump between the two graphs or both graphs.