User Reference:BCI2000Viewer

2013-06-27T19:34:07Z

Nilew:

''BCI2000Viewer'' displays brain signal data and [[BCI2000 Glossary#State|state variables]] contained in [[Technical Reference:BCI2000 File Format|BCI2000 data files]].

[[Image:BCI2000Viewer.PNG]]

==Opening Files==
To open a data file, drag-and-drop it into the program's main window. Alternatively, double-click a .dat file in Windows Explorer, and choose BCI2000 FileViewer when prompted for an application program to associate with the .dat extension.

==Browsing==
User interface elements for browsing are located below the signal display.
*<tt>|<<</tt> and <tt>>>|</tt> move to beginning/end of file;
*<tt><<</tt> and <tt>>></tt> move forward/backward by entire pages (i.e., the amount of time displayed in the window);
*<tt><</tt> and <tt>></tt> move forward/backward by sample blocks;
*''Zoom in'' and ''Zoom out'' enlarge/shrink the time axis;
*the ''position'' field displays the current position in <tt>hh:mm:ss</tt> format, followed by the total length of the file. Entering a value in seconds, or in <tt>hh:mm:ss</tt> format, will move the center of the display to the specified position.

==Selecting States and Channels for Display==
Once a file is opened in BCI2000 Viewer, the area to the right displays a list of state variables and brain signal channels contained in the data file.
By default, all channels are selected for display, and none of the states are.
To display one or more state, mark the respective checkbox.

State names and values are displayed above the signal; whenever a state changes its value, a vertical line indicates the respective point in time, and the state's new value appears at the top end of that line.

==Display Properties==
Similar to the [[User Reference:Operator Module#Visualization Windows|signal display]] in the operator module, display properties may be changed from the ''View'' menu (which is reduplicated as a context menu that appears by right-clicking the signal display).

Also, the following keyboard shortcuts are provided:
{|
|''up/down''||back/forward one channel,
|-
|''page-up/page-down''||back/forward one screenful of channels,
|-
|'' 'b'/space''||same as page-up/page-down ('less'-like shortcuts),
|-
|''-/+''||reduce/enlarge the signal,
|-
|'',/.''||fewer/more channels,
|-
|''left/right''||slow down/speed up the time sweep,
|-
|''home/end''||jump to the first/last screenful of channels,
|-
|''typing a number and pressing return (or 'g')''||jump to the specified channel number.
|}

====Unit Display====
{{UnitDisplay}}

====Choosing Signal Colors====
{{ChooseColors}}

==See also==
[[User Reference:BCI2000FileInfo]]

[[Category:User Interface]][[Category: Data Analysis Tools]]

BCI2000 Wiki - User contributions [en]

User Reference:BCI2000Viewer