[R] collided row names in heatmap.2

[Elham Hooshmand]

Hi,

I am trying to draw a heatmap for my 45 topvar gene by the use of
heatmap.2, and when I set a srtRow=45 in my code(below):

heatmap.2( assay(rld)[ topVarGenes, ], srtRow=45, scale="row",trace="none",
dendrogram="column",col = colorRampPalette( rev(brewer.pal(9, "RdBu"))
)(255))

row names collided with each other in a messy way.

would you please help me to solve this problem? (also I'm a newbie beginner
using R Studio) Thank you so much
(also I attached the output image)