gene expression level of a specific gene-set from cuffdiff output

Question

[Giuseppe]

I’m using CummeRbound for analyzing Cuffdiff output. I need to focus the analysis of expression dynamics to a restricted gene set (roughly 50-100 genes). My aim would be to construct a heat map where is plotted the expression level of selected genes across the samples.

From the manual they provided a function to "grab a single gene of interest":

myGeneId<-"XLOC_020405"
myGene<-getGene(cuff,myGeneId)
myGene

How can I extend this analysis from one single gene to a set of genes?

Thank you in advance.

[EagleEye]

Your question is bit confusing, Do you like to construct heatmap for all your genes across different samples using FPKM values from cufflinks?