Knowledge Base

Edit Axes, Gridlines, and Legend

In the Chart Properties window, click Axes and Legend.

For the Vertical axis:

• Select Display vertical axis title and enter the new title. The default title is [name of trial statistic] [unit].
• Next to Scale min and Scale max, set minimum and maximum value of the vertical axis automatically (Auto), or select Fixed and enter the values you require.
• Select or deselect Display gridlines.

For the Horizontal axis:

• Select Display horizontal axis title and enter the new title. The default title is the name of the category selected as Horizontal axis.

For the Legend:

• Select Display legend. The legend lists the possible combinations of specifiers and the item selected under Data series, separated by "/".

Apply the Changes to Other Charts

Click Apply to All at the bottom of the Chart Properties window. This copies the settings to all charts on that tab, not in other tabs.

Reset to Default Charts

Click Reset to Default at the bottom of the Chart Properties window. This resets the current chart to default, not other charts.

Notes

• In Box and whiskers charts, the box includes from 25% (first quartile) to 75% (third quartile) of the data points; the range of data is also named interquartile range. The whiskers include the whole range of the data, including potential outliers.
• If you deselect an element from the Show/Hide menu, this element is removed from the statistics table, not from the chart.
• To remove a statistic from the chart, right-click the header of the dependent variable in the table, and click Properties. Click Group Statistics, and deselect that statistic.

Batch Calculation

Aim

Batch calculation helps you perform calculations in multiple runs, each with a particular combination of track smoothing settings, data profiles and analysis profiles. It is handy when you have large data sets that take hours to analyze. In that case you can start batch calculation at the end of the day, and return the next day to collect the results.

Each analysis run is based on a combination of three profiles:

• Track Smoothing profile (for smoothing tracks and filtering noise).
• Data profile (the trials and samples subject to analysis).
• Analysis profile (the dependent variables and their statistics).

When you carry out batch data acquisition, it is also useful to couple this with batch statistics calculations, so that analysis is started automatically after acquisition of the last trial has ended. See Auto-start data analysis.

To Run Batch Calculation

1. Make sure that all Track Smoothing profiles, Data profiles and Analysis profiles that you want to use are defined in the Experiment Explorer.
2. Choose Analysis > Results > Statistics & Charts, or in the Experiment Explorer, under Results, click Statistics & Charts.
3. Click the Batch button.
4. In the Batch Calculation window, do one of the following:
   • If you want to carry out batch calculation for all the combinations of Track smoothing profiles, Data profiles and Analysis profiles, click Add all.
   • If you are interested in specific combinations of profiles, select the combination of profiles that you want to use, and click Add. Repeat this step for all the combinations you require.

   To remove a profile combination, click that combination in the list and then click Delete. To select multiple combinations, click each combination while holding the Ctrl key down.

   To minimize processing time and disk space occupied by the results, make sure that when you select Add all, the Track smoothing, Data and Analysis profiles in your experiment are those you want to use for analysis. Remove any duplicate or non-interesting profiles.

5. The Batch Calculation window lists the combinations selected for calculation.
6. Click Calculate when you are ready. To retrieve the results for a particular combination of profiles, select this combination from the lists on the toolbar.
7. Export the results. Note: You can export the result for one combination of profiles at a time. See Export the statistics result.

Note

• Batch statistics calculations create a number of temporary files. For this reason, they may require large disk space, especially when you analyze large amounts of data. These files may also make backup files excessively large. Before backing up an experiment, make sure to remove unnecessary files to create a smaller backup file. For more information, see Back up an experiment.

Dependent Variables

Notes

• You can use dependent variables:
  • In Trial Control. For example, to start tracking when a specific behavior or event occurs.
  • In the Data profile. For example, to select the intervals when the subject was moving.
  • In the Analysis profile. For example, to calculate statistics of distance, velocity or specific behaviors.
• Some dependent variables are only available if you have one of the add-on modules installed: Trial and Hardware Control, Social Interaction, Rat/Mouse Behavior Recognition and Live Mouse Tracker.

Activity and Movement

• Distance Moved
• Velocity
• Movement
• Acceleration
• Acceleration State
• Activity
• Activity State
• Body Elongation
• Body Elongation State
• Mobility
• Mobility State

Source: EthoVision XT 19 Help, Noldus Information Technology