# External data plots

External data are shown in the form of X-Y plots. The start and end time of the tracks does not always coincide with the start and end time of the co-acquired external data. When you visualize the integrated data, you can only view the external data acquired in the same time interval as the tracks associated with the external data file. External data samples acquired before the start and after the end of the tracks are not plotted.

The hairline shows the current video/track position. The current value of heart rate is shown next to the data set name.

By default the external data are not plotted in the Integrated Visualization.

Plot the original signals

1.Choose Show/Hide > Dependent Variables.

2.Select the [data set name] (original signal) that you require.

By default the original signal is plotted in green.

Plot the resampled signals

1.Define the re-sampled signal in the Analysis profile. See External data (resampled).

2.Choose Analysis > Results > Integrated Visualization.

By default, resampled signals are plotted in red.

▪Select Show/Hide > Show Graph Data Points to better view the original and resampled signals.

▪If you upsample a signal with a sample rate much lower than the EthoVision sample rate, and you choose Missing value as the Upsampling method, it may be difficult to see the data points. Choose Show/Hide > Show Graph Data Points and zoom in the plot.

Synchronize the external data with the tracks

Click the Synchronize External Data button.

Either change the Start date and time and Stop date and time, or move the external data plot to the correct position. For details, see Synchronize data manually after import.

The plot’s titles

The titles are shown at the left of the plots and vary according to what level the external data have been linked at.

▪If linked to the subject level, the title shows the Arena and Subject names.

▪If linked to the arena level, the title shows the Arena name.

▪If linked to the whole trial, the title is not shown.

In the example below, the first plot was linked at the Arena level, the second at the subject level.

See also Customize tracks and plots.