
WaveRider Operating Manual
43
Copyright 1997-2004 Jonathan Purcell
All Rights Reserved
Bar Graph Options
The Bar Graph Options dialog box allows you to change the appearance and characteristics of
the Fast Bars and Slow Bars windows.
Channels
Choose among the WaveRider channels (or among the saved channels, if an archive file is
being read); the chosen channels will be displayed in this bars window. Some of the channel
checkboxes may be grayed, indicating channels that have a different use category.
If multiple channels are displayed in one window, those channels become Linked; the ranges
of linked channels are always kept the same.
Timebase
The Slow Bars display differs from Fast Bars in that the Slow Bars display averages the
frequencies of the brain signals over a selected number of seconds.
A longer timebase renders the Slow Bars display more stable and hence easier to read, while
a shorter timebase makes events such as a momentary burst of a certain frequency more
visible.
umbered Frequencies
If this box is checked, the Bars display includes a post which shows the frequencies
represented by the bars, numbered from 1 to 40 Hz.
Style
The arrangement of the bar graphs within the window may be selected, by clicking on the
picture that represents your preference. This allows you to arrange the window so that the
display reflects the positions of the electrodes on the scalp. The channels are always
displayed in order, from the top left across the window.
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