USB-5100 Series Software Help
Reading Out, Plotting, and Analyzing Data
32
Using the Arrow Tool
Use the Arrow tool to select items on the plot. Click the Arrow icon on the toolbar or press <A> to select the
arrow tool.
If you are using another tool and do not want to switch tools, press <N> on your keyboard to select each graph
item (including hidden items, such as value axes for states or events) in sequence.
The selected item (if visible) is shaded or boxed. You can then right-click the selected item, double-click it, or
press <Enter> to open the Properties dialog box for that item.
To deselect, click an area within the axes that does not have series data. Select
View»Select None
or press
<D>.
Using the Crosshair Tool
Use the crosshair tool to zero in on a specific date and time in the plot and any data points associated with that
date and time. To use the crosshair, complete the following steps:
1.
Click the Crosshair icon
on the toolbar or press <C>.
7.
Click a point on the graph to mark it.
8.
Click another point to move the marker.
When you click on a graph, the nearest data point is selected. When series are very close together and the
location you click is between two points, it is possible that the nearest point is not on the series you clicked.
You can also mark the point on the graph by clicking the corresponding cell in the Points table. If you are
zoomed in and click a point in the Points table that is outside the zoom area, the plot scrolls to that area of the
graph.
To prevent scrolling in this situation, complete the following steps:
1.
Select
File»Preferences»Plotting»Points Table & Details Pane
.
2.
Clear the
When selected value in table is out of plot range, drag series to that value
checkbox.
The plot changes in several ways when the crosshair is in use. The Points table shifts to the row that contains
the data point. Where the crosshair intersects a data point, a square surrounds the data point. The intersection
points are also marked by small color-coded arrows on the left and right value axes.
If the legend is displayed next to the graph, the point values for each series are updated to reflect the crosshair
location. Values are listed in the legend differently depending on whether the data is a logged sample, state, or
event:
Values that are not in parentheses are actual data points logged at the time selected by the crosshair.
Values in parentheses are estimated because there were no exact values for the series at the time selected by
the crosshair. Zoom in or move the crosshair to see actual values.
A value of
…
indicates that there is no series data during the time selected. This is seen most frequently for
events. If the time selection falls within an event series, but does not contain an event, parentheses surround
the
…
value.
A value of
logged
indicates an internal logger event happened at the selected time.
The legend must expand in height to list the point values. If the application window is too small to
accommodate the expanded height, the values does not be added to the legend. You can still refer to the Points
table to find the values of the selected points.
To remove the crosshair from the graph, right-click the plot and select
Remove Crosshair
from the context
menu or select
View»Remove Crosshair
.
