Boxplot of Top2b
Next a sanity check: create a boxplot of the expression level of Top2b to confirm the null mice have lower levels of Top2b expression.
Recall that you made a similar boxplot in Chapter 1 Exercise 4.
Cet exercice fait partie du cours
Differential Expression Analysis with limma in R
Instructions
The ExpressionSet object eset with the doxorubicin data has been loaded in your workspace.
Find the row that contains the Top2b data by searching the feature data column
"symbol"for"Top2b".Create a boxplot using the formula syntax. The expression level should be to the left of the
~, and the genotype variable to the right.Pass the feature data frame row to
mainto title the plot.
Exercice interactif pratique
Essayez cet exercice en complétant cet exemple de code.
# Find the row which contains Top2b expression data
top2b <- which(___(eset)[___] == "Top2b")
# Plot Top2b expression versus genotype
boxplot(___(eset)[top2b, ] ~ ___(eset)[___],
main = ___(eset)[top2b, ])