tk_message(text [, time]) Opens a new window and displays the 'text' message during 'time' seconds. if 'time' is not specified, the default is five seconds. After 'time' is elapsed, if a tk interpreter was launched, it will be terminated. If you want to cancel a message before 'time' expires, call tk_message with only one (possibly empty) argument. If a further tk_message is issued before 'time' of the previous one has expired, the new message will be displayed, and the timer rearmed with the new value. Octave can continue processing meanwhile.