Medcn: Difference between revisions
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===Purpose=== | ===Purpose=== | ||
Median center scales matrix to median zero. | Median center scales matrix to median zero. | ||
===Synopsis=== | ===Synopsis=== | ||
:[mcx,mx,msg] = medcn(x,''options'') | :[mcx,mx,msg] = medcn(x,''options'') | ||
===Description=== | ===Description=== | ||
MEDCN centers a matrix x to it's median and returns a matrix mcx with median zero columns and a vector of medians mx used to center the data. Optional input options is discussed below. | MEDCN centers a matrix x to it's median and returns a matrix mcx with median zero columns and a vector of medians mx used to center the data. Optional input options is discussed below. | ||
The output msg returns any warning messages. | |||
The output <tt>msg</tt> returns any warning messages. | |||
===Options === | ===Options === | ||
* display: [ {'off'} | 'on'] Governs screen display. | ''options'' = a structure array with the following fields. | ||
* matrix_threshold: | |||
* column_threshold: | * '''display''': [ {'off'} | 'on'] Governs screen display. | ||
* '''matrix_threshold''': [.15] Error threshold based on fraction of missing data in whole matrix. | |||
* '''column_threshold''': [.25] Error threshold based on fraction of missing data in single column. | |||
===See Also=== | ===See Also=== | ||
[[auto]], [[mncn]], [[rescale]], [[scale]] | |||
[[auto]], [[mncn]], [[percentile]], [[polytransform]], [[rescale]], [[scale]] | |||
Latest revision as of 10:07, 21 September 2011
Purpose
Median center scales matrix to median zero.
Synopsis
- [mcx,mx,msg] = medcn(x,options)
Description
MEDCN centers a matrix x to it's median and returns a matrix mcx with median zero columns and a vector of medians mx used to center the data. Optional input options is discussed below.
The output msg returns any warning messages.
Options
options = a structure array with the following fields.
- display: [ {'off'} | 'on'] Governs screen display.
- matrix_threshold: [.15] Error threshold based on fraction of missing data in whole matrix.
- column_threshold: [.25] Error threshold based on fraction of missing data in single column.