Stateflow®

Truth Table Editor Operations

Truth Table Editor Reference

This section describes the operations you can perform in the Truth Table Editor.

Adding or Modifying Stateflow Data

Appending Rows and Columns

Compacting the Table

Deleting Text, Rows, and Columns

To delete the contents of a cell:

1. Right-click the cell.

2. From the context menu, select Delete Cell.

To delete an entire row or column:

1. Right-click the row or column header.

2. From the context menu, select Delete Row or Delete Column.

   You can also click the row or column header to select the entire row or column and press the Delete key.

Diagnosing the Truth Table

Viewing Generated Content

Editing Tables

Both the default Condition Table and the default Action Table have one empty row. Click a cell to edit its text contents. Use Tab and Shift+Tab to move horizontally between cells. To add rows and columns to either table, see Appending Rows and Columns .

You set the Truth Table Editor to display only one of the two tables by double-clicking the header of the table to display. To revert to the display of both tables, double-click the header of the displayed table.

Cells for the numbered rows in decision columns like D1 can take values of T, F, or -. Once you select one of these cells, you can use the spacebar to step through the T, F, and - values. In these cells you can use the left, right, up, and down arrow keys to advance to another cell in any direction.

Inserting Rows and Columns

To insert a blank row above an existing table row:

1. Right-click any cell in the row (including the row header).

2. From the context menu, select Insert Row.

To insert a blank decision column to the left of an existing decision column:

1. Right-click any cell in the existing decision column (including the column header).

2. From the context menu, select Insert Column.

Moving Rows and Columns

To move a condition or action row up or down:

1. Click the row header to select the row.

2. Drag the row to a new position.

   The Truth Table Editor renumbers the rows automatically.

To move a decision column up or down:

1. Click the column header to select the column.

2. Drag the column to a new position.

   The Truth Table Editor renumbers the decision columns automatically.

Printing Tables

Selecting and Deselecting Table Elements

• To select a cell for editing, click the cell.

• To select text in a cell, click and drag your pointer over the text.

• To select a row, click the header for the row.

• To select a decision column in the Condition Table, click the column header (D1, D2, and so on).

• To deselect a selected cell, row, or column, press Esc, or click another table, cell, row, or column.

Undoing and Redoing Edit Operations

Viewing the Stateflow Chart for the Truth Table

Back to Top

Searching and Replacing Text in Truth Tables

You can use the Search & Replace tool to search for text in the Description, Condition, and Action columns of a truth table and replace it with a substitute string.

A Simple Example

Suppose you want to search a model for the string x is equal to and replace it with the string x equals. Follow these steps:

1. In the Stateflow Editor, select Search & Replace from the Tools menu.

2. In the Search & Replace dialog box, enter the text x is equal to in the Search field, and the text x equals in the Replace field.

3. Select the Search button.

   You see something like this in the Search & Replace window.

   

   In the Viewer pane of the Search & Replace window, the first occurrence of the string x is equal to is highlighted normally and the other matches are highlighted lightly.

4. Select Replace to replace the first match with x equals.

5. Select Replace All to replace all matches in the model (not just in the truth table) with x equals.

   Note   For more information, see Using the Stateflow Search & Replace Tool.

Back to Top

Using Row and Column Tooltip Identifiers

Row and column header tooltips appear to aid truth table navigation when you scroll to other columns or rows while editing a large truth table. When you place your pointer over row or column headers, these tooltips appear:

Back to Top

How Stateflow Software Implements Truth Tables

Using Embedded MATLAB Functions in Stateflow Charts