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PSStruct =
probesetlookup(AffyStruct, ID)
| AffyStruct | Structure created by the affyread function from an Affymetrix CHP file or an Affymetrix CDF library file for expression assays. |
| ID | String or cell array of strings specifying one or more probe set IDs/names or gene IDs. |
| PSStruct | Structure or array of structures containing
the following fields for a probe set:
|
PSStruct = probesetlookup(AffyStruct, ID) returns a structure or an array of structures containing information for an Affymetrix probe set specified by ID, a string or cell array of strings specifying one or more probe set IDs/names or gene IDs, and by AffyStruct, a structure created from an Affymetrix CHP file or Affymetrix CDF library file for expression assays.
Note This function works with CHP files and CDF files for expression assays only. It requires that the GIN library file associated with the CHP file or CDF file to be located in the same folder as the CDF library file. |
The following example uses the CDF library file from the E. coli Antisense Genome array, which you can download from:
http://www.affymetrix.com/support/technical/sample_data/demo_data.affx
The following example assumes that the Ecoli_ASv2.CDF library file is stored at D:\Affymetrix\LibFiles\Ecoli.
Read the contents of a CDF library file into a MATLAB structure.
cdfStruct = affyread('D:\Affymetrix\LibFiles\Ecoli\Ecoli_ASv2.CDF');Look up the gene ID (Identifier) associated with the argG_b3172_at probe set.
probesetlookup(cdfStruct,'argG_b3172_at')
ans =
Identifier: '3315278'
ProbeSetName: 'argG_b3172_at'
CDFIndex: 5213
GINIndex: 3074
Description: [1x82 char]
Source: 'NCBI EColi Genome'
SourceURL: [1x74 char]Bioinformatics Toolbox functions: affyread, celintensityread, probelibraryinfo, probesetlink, probesetplot, probesetvalues, rmabackadj

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