Справочник Пользователя для Vernier Software & Technology LQ2-LE
LabQuest App
20
Integral
– The Integral tool numerically
integrates graphed data. Select a region, if
needed, then choose Integral from the Analyze
menu. Enable the tool by tapping on the
displayed sensor or column name. The integral
will be drawn, and the numeric result will be
displayed to the right of the graph.
needed, then choose Integral from the Analyze
menu. Enable the tool by tapping on the
displayed sensor or column name. The integral
will be drawn, and the numeric result will be
displayed to the right of the graph.
Statistics
– The Statistics tool displays statistics
for graphed data. Select a region, if needed, and
then choose Statistics from the Analyze menu.
Enable the tool by tapping on the displayed
sensor or column name. Descriptive statistics
will be displayed to the right of the graph. If a
region is selected, brackets are drawn to indicate
the region used for calculations
then choose Statistics from the Analyze menu.
Enable the tool by tapping on the displayed
sensor or column name. Descriptive statistics
will be displayed to the right of the graph. If a
region is selected, brackets are drawn to indicate
the region used for calculations
Delta
– The Delta tool opens a preview window
where you can examine x- and y-deltas. Choose
Delta from the Analyze menu to open the
preview window. Then tap-and-drag to create a
box overlaid on the graph. The vertical side of
the box yields
Delta from the Analyze menu to open the
preview window. Then tap-and-drag to create a
box overlaid on the graph. The vertical side of
the box yields
y, and the horizontal side of the
box yields
x. Tap OK to keep these values and
display the box on the Graph screen. To exit the
Delta tool without displaying the box on the
Graph screen, tap Cancel.
Delta tool without displaying the box on the
Graph screen, tap Cancel.
Curve Fit
– The Curve Fit tool allows you to
automatically fit a chosen function to your data.
If a region of the graph is selected, only that
region is used for fitting. If there is no selection,
the entire graph is used.
If a region of the graph is selected, only that
region is used for fitting. If there is no selection,
the entire graph is used.
Enabling the curve fit displays a Curve Fit
dialog box. Choose the desired fit equation from
the drop-down menu. Upon choosing the fit
equation, LabQuest will display the fit in the
preview graph at left. The fit coefficients and Root Mean Square Error (RMSE) are also
displayed. Tap OK to keep this fit and display the curve on the Graph screen. To exit the
Curve Fit tool without applying the curve, tap Cancel.
dialog box. Choose the desired fit equation from
the drop-down menu. Upon choosing the fit
equation, LabQuest will display the fit in the
preview graph at left. The fit coefficients and Root Mean Square Error (RMSE) are also
displayed. Tap OK to keep this fit and display the curve on the Graph screen. To exit the
Curve Fit tool without applying the curve, tap Cancel.
Tip: The RMSE (root mean square error) is a measure of how well the fit matches the
data. The smaller the RMSE, the closer the data are to the fitted line. The RMSE has the
same units as the y-axis data.
data. The smaller the RMSE, the closer the data are to the fitted line. The RMSE has the
same units as the y-axis data.