User Reference:BCI2000 Offline Analysis - Revision history

Abelsten: /* Installing and Running */

2021-03-23T20:47:46Z

Installing and Running

← Older revision		Revision as of 20:47, 23 March 2021
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	== Installing and Running ==		== Installing and Running ==
	In order to run ''BCI2000 Offline Analysis'' you'll need a system running Windows. If your system meets this requirement, please choose from one of the following:		In order to run ''BCI2000 Offline Analysis'' you'll need a system running Windows. If your system meets this requirement, please choose from one of the following:


	===Systems with MATLAB v7.0 or greater installed===		===Systems with MATLAB v7.0 or greater installed===

Abelsten: /* Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0 */

2021-03-23T20:47:14Z

Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0

← Older revision		Revision as of 20:47, 23 March 2021
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	===Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0===		===Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0===
	# Install the MATLAB Component Runtime (MCR)		# Install the MATLAB Component Runtime (MCR)
	## [http://www.~~bci2000~~.~~org~~/~~downloads~~/~~bin~~/~~MCRInstaller~~.~~exe Click here~~] ~~to download the MCR installer for Windows~~.		## Download MATLAB runtime version 8.5 (R2015a) from the [http://www.mathworks.com/products/compiler/mcr/index.html MathWorks website].
	## When the download is complete, run the installer.		## When the download is complete, run the installer.
	## Follow the on-screen instructions to complete the installation.		## Follow the on-screen instructions to complete the installation.
	# Navigate to <tt>tools/OfflineAnalysis/</tt>		# Navigate to <tt>tools/OfflineAnalysis/</tt>
	# ~~Double~~-click <tt>~~OfflineAnalysisWin~~.exe</tt> to begin analyzing your data.		# If you installed the x64 version of MATLAB runtime version 8.5, double-click <tt>OfflineAnalysisWin64.exe</tt> to begin analyzing your data. Otherwise, run <tt>OfflineAnalysisWin32.exe</tt>.

	== Reference ==		== Reference ==

Mellinger: /* Installing and Running */

2019-06-11T14:34:39Z

Installing and Running

← Older revision		Revision as of 14:34, 11 June 2019
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	== Installing and Running ==		== Installing and Running ==
	In order to run ''BCI2000 Offline Analysis'' you'll need a system running ~~either~~ Windows ~~XP or 2000~~. If your system meets this requirement, please choose from one of the following:		In order to run ''BCI2000 Offline Analysis'' you'll need a system running Windows. If your system meets this requirement, please choose from one of the following:

Mellinger: /* Operation */

2012-01-30T16:25:47Z

Operation

← Older revision		Revision as of 16:25, 30 January 2012
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	[[Image:offlineAnalysis.png]]		[[Image:offlineAnalysis.png]]

	==Operation==		==Basic Operation==
	The OfflineAnalysis tool operates in two steps. In a first step, it transforms recorded data such that it is now represented by a certain set of features rather than by EEG time courses. The set of features differs by the type of data analyzed as follows:		The OfflineAnalysis tool operates in two steps. In a first step, it transforms recorded data such that it is now represented by a certain set of features rather than by EEG time courses. The set of features differs by the type of data analyzed as follows:

Mellinger at 16:25, 30 January 2012

2012-01-30T16:25:32Z

← Older revision		Revision as of 16:25, 30 January 2012
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	[[Image:offlineAnalysis.png]]		[[Image:offlineAnalysis.png]]

			==Operation==
			The OfflineAnalysis tool operates in two steps. In a first step, it transforms recorded data such that it is now represented by a certain set of features rather than by EEG time courses. The set of features differs by the type of data analyzed as follows:

			For P300 (ERP) data, a single feature corresponds to
			* raw EEG amplitude
			* at a certain time offset after the stimulus
			* in a certain channel.

			For mu rhythm (SMR) data, a single feature corresponds to
			* absolute value of EEG amplitude
			* at a certain frequency
			* in a certain channel.

			After transformation from raw EEG into features, data are selected/sorted into two groups according to the conditions specified in the OfflineAnalysis GUI. Again, the meaning of these conditions depends on the type of data analyzed: For P300 data, one condition is the presentation of an unattended stimulus, while the other condition is the presentation of an attended stimulus. For mu rhythm data, one condition may be imagined movement of the left hand, while the other condition may be rest.

			Now, for a single feature, there exists a number of sampled values, taken from two sets (conditions). What OfflineAnalysis now does is that it uses these values to compute a number representing how much a feature's value tells about the condition under which it was recorded. That measure is called "determination coefficient", or "r^2 (r squared)," and is a number between 0 and 1. The larger a feature's r^2, the more correlation exists between a feature's value and the condition under which it was recorded. For details about how r^2 values are computed, see [[Glossary\|Coefficient of Determination]].

			Finally, OfflineAnalysis produces a main graph that shows r^2 values, plotted over the two dimensions that locate a feature. Using this graph, one may identify and select individual channels and time offsets/frequencies for which to display more detailed information, i.e. topographic plots, ERP wave forms, spectra.

	== Installing and Running ==		== Installing and Running ==

Mellinger: /* See also */

2012-01-30T16:19:35Z

Mellinger: /* See also */

2012-01-30T16:18:48Z

Mellinger at 16:17, 30 January 2012

2012-01-30T16:17:02Z

← Older revision		Revision as of 16:17, 30 January 2012
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	''I've typed in a valid target or trial change condition, but I get the error "Invalid ... condition specified".''		''I've typed in a valid target or trial change condition, but I get the error "Invalid ... condition specified".''
	Condition syntax is case-sensitive. For instance, while states.TargetCode may be a valid state condition, states.targetcode is not. Please double-check your conditions to ensure that the state variables are capitalized correctly.		Condition syntax is case-sensitive. For instance, while states.TargetCode may be a valid state condition, states.targetcode is not. Please double-check your conditions to ensure that the state variables are capitalized correctly.

			==See also==
			[[User Tutorial:Performing an Offline Analysis of EEG Data]], [[User Tutorial:Performing a Time-Domain Offline Analysis of EEG Data]]

Jhill at 02:01, 28 January 2012

2012-01-28T02:01:10Z

← Older revision		Revision as of 02:01, 28 January 2012
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	''BCI2000 Offline Analysis'' is a tool for finding useful features in EEG and ECoG data.		''BCI2000 Offline Analysis'' is a graphical tool for finding useful features in EEG and ECoG data. It should not be confused with the [[User_Reference:Matlab_Tools\|matlab tools for offline data analysis]], which are of more interest to experienced Matlab users.

	[[Image:offlineAnalysis.png]]		[[Image:offlineAnalysis.png]]

Mellinger: /* Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0 */

2008-10-16T16:03:50Z

Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0

← Older revision		Revision as of 16:03, 16 October 2008
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	===Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0===		===Systems that do not have MATLAB installed or with versions that predate MATLAB v7.0===
	# Install the MATLAB Component Runtime (MCR)		# Install the MATLAB Component Runtime (MCR)
	## [http://www.bci2000.org/downloads/bin/~~mcrInstallerWin7.0~~.exe Click here] to download the MCR installer for Windows.		## [http://www.bci2000.org/downloads/bin/MCRInstaller.exe Click here] to download the MCR installer for Windows.
	## When the download is complete, run the installer.		## When the download is complete, run the installer.
	## Follow the on-screen instructions to complete the installation.		## Follow the on-screen instructions to complete the installation.

← Older revision		Revision as of 16:19, 30 January 2012
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	[[User Tutorial:Performing an Offline Analysis of EEG Data]], [[User Tutorial:Performing a Time-Domain Offline Analysis of EEG Data]]		[[User Tutorial:Performing an Offline Analysis of EEG Data]], [[User Tutorial:Performing a Time-Domain Offline Analysis of EEG Data]]

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

← Older revision		Revision as of 16:18, 30 January 2012
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	==See also==		==See also==
	[[User Tutorial:Performing an Offline Analysis of EEG Data]], [[User Tutorial:Performing a Time-Domain Offline Analysis of EEG Data]]		[[User Tutorial:Performing an Offline Analysis of EEG Data]], [[User Tutorial:Performing a Time-Domain Offline Analysis of EEG Data]]

			[[Category:Data Analysis Tools]]