Repeated Measures - Data in Parallel

Data

This specifies the list of data variates containing the measurements to be analysed. The

button allows multiple selections to be copied from Available Data.

Time Points

A variate or list of values specifying the time points for the observations for the subjects. The number of values in the variate or list must equal the number of variates entered in the Data field. If the values are entered using a list, the items in that list can be separated by spaces or commas.

Equally spaced time-points

Specifies whether the times of measurement are equally spaced or irregular. The available types of correlation model that can be fitted will differ according to whether the time points are equally spaced or irregular.

Model for correlation within subject across time

Lists the available correlation models that can be fitted. The types of models available will depend on the form of the repeated measurements i.e. whether the time-points are equally spaced or whether the time-points are the same for all subjects.

Allow heterogeneity across time

For the models defined in terms of correlation matrices, that is, the AR, uniform, power and ante-dependence models, it may sometimes be desirable to allow for unequal variances. Select this option to allow heterogeneity across time.

Additional uniform correlation within subject

Specifies whether you want to include additional uniform correlation within subject into the model.

Fixed Model

The fixed model describes imposed treatment factors and covariates for which the effect of specified levels or values are of interest. The model is described using a formula, which can combine main effects and interactions of factors and also covariates.

Available Data

This lists data structures appropriate to the current input field. The contents will change as you move from one field to the next. Double-click on a name to copy it to the current input field; alternatively, you can type in the name directly.

Operators

This provides a quick way of entering operators in the fixed model formula. Double-click on the required symbol to copy it to the current input field. You can also type in operators directly. See model formula for a description of each.

Action Buttons

Run	Run the analysis.
Cancel	Close the menu without further changes.
Options	Opens a dialog where additional options and settings can be specified for the analysis.
Defaults	Set the menu settings back to the default settings. Clicking the right mouse on this button produces a shortcut menu where you can choose to set the menu using the currently stored defaults or the GenStat default settings.
Save	Opens a dialog where you can save results from the analysis.
Predict	Allows you form predictions based on the current model.
Further output	Opens a dialog for specifying further output from the analysis and displaying residual and means plots.