Microarray Data Analysis Using BRB-ArrayTools Version 4.2.0 ...

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Prediction <strong>Analysis</strong> <strong>Microarray</strong>PAM• Uses Shrunken Centroid algorithm developed byTibshirani’s s group (Stanford).• Similar to Nearest Centroid but the centroids areshrunk towards each other based on shrinking theclass means for each gene towards an overall mean.• Amount of shrinking is determined by a tuningparameter delta and the number of genes includedin the classifier is determined by the value of delta.128
Important notes• Cross validation is only valid if the test set isnot used in any way in the development of themodel.• With proper CV, the model must be developedfrom scratch for each leave-oneone-out out training set.This means that feature selection must berepeated for each leave-oneone-out. out.129
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Microarray Data AnalysisUsing BRB-A
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Part I:What is BRB-ArrayTools?3
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Features of BRB-ArrayTools• Capab
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New to ArrayToolsv4.1• Affy ST ar
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Full Installer• Also available is
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Downloading BRB-ArrayTools• After
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Installing BRB-ArrayTools13
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Installing BRB-ArrayTools• Select
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Installing BRB-ArrayTools• Procee
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Installing BRB-ArrayTools• Instal
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Excel 2007- loading the add-in• 1
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Part II:Getting your data intoBRB-A
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Expression data(one or more files)E
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Expression dataHorizontally aligned
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Gene identifiers• A gene identifi
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Experiment descriptorsDescribes the
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Gene lists• Genelists are used fo
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Gene listsUser-defined text files38
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Specify data using thecollate dialo
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Affymetrix CEL file importation•
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Part III:The collated projectworkbo
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[Hands-on instructions][Importing P
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• Click “OK”[Hands-on instruc
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Collated project workbookOverview
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The collated project workbookGene i
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The collated project workbookGene a
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[Hands-on instructions][Data filter
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Data filtering optionsNormalization
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Data filtering optionsGene filters:
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Data filtering optionsGene subsets
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Scatterplot tools• Scatterplot of
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[Optional: Hands-on instructions][S
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Analysis Wizard• Finding GenesFin
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Tools for finding Genes/Genesetscom
Page 78 and 79: Class Comparison78
Page 80 and 81: Class comparison tool1. Enter the c
Page 82 and 83: Average over replicates• If multi
Page 84 and 85: Find genes lists determined by:84
Page 86 and 87: [Hands-on instructions][Class compa
Page 88 and 89: Class comparison toolMultivariate p
Page 90 and 91: Gene ontology analysis• In the cl
Page 92 and 93: [Hands-on instructions][Significanc
Page 94 and 95: Gene Set ExpressionComparison• Co
Page 96 and 97: Goeman’s s Global test• Tests t
Page 98 and 99: Quantitative trait tool• Selects
Page 100 and 101: Survival Gene Set analysis• This
Page 102 and 103: Hierarchical clustering tools• Cl
Page 104 and 105: [Hands-on instructions - cont’d][
Page 110 and 111: Multidimensional scaling• Rotatin
Page 112 and 113: Analysis Wizard- Prediction• Clas
Page 114 and 115: C1. Gene Selection Criteria• Sele
Page 116 and 117: C2. Class prediction Methods• Six
Page 118 and 119: Permutation test• Use a permutati
Page 120 and 121: Linear classifiers for two classesl
Page 122 and 123: Diagonal linear discriminant analys
Page 124 and 125: K-nearest neighbor• May be used f
Page 126 and 127: Support vector machines(V. Vapnik)
Page 130 and 131: [Hands-on instructions ][Class pred
Page 132 and 133: Included plugins• Analysis of Var
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Page 136 and 137: Further help• We hope this class
Page 138 and 139: Technical support• For questions
Page 140 and 141: Feedback on this class• Please fi
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Microarray Data Analysis Using BRB-ArrayTools Version 4.2.0 ...

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