Create an ExpressionSet object

Managing 3 different data sets for one experiment is tedious and error-prone, especially if you need to perform any filtering. Combine the 3 data sets from the leukemia experiment into a unified object using the Bioconductor class ExpressionSet.

Cet exercice fait partie du cours

Differential Expression Analysis with limma in R

Afficher le cours

Instructions

The expression matrix (x), feature data (f), and phenotype data (p) are loaded in your workspace.

Create a new ExpressionSet object using the function ExpressionSet.
Pass the expression matrix to the assayData argument.
Pass the phenotype data frame to the phenoData argument.
Pass the feature data frame to the featureData argument.

Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

# Load package
library(Biobase)

# Create ExpressionSet object
eset <- ___(assayData = ___,
                      phenoData = AnnotatedDataFrame(___),
                      featureData = AnnotatedDataFrame(___))

# View the number of features (rows) and samples (columns)
dim(eset)

Modifier et exécuter le code