Hi.

I am a student and I am currently learning about microarray analysis.  I
tried to install genefilter package on my Ubuntu OS, but run into the
following problem.

Input:
> source("http://bioconductor.org/biocLite.R")
> biocLite("genefilter")

Error message:
The downloaded source packages are in
    ‘/tmp/RtmpUU7GsP/downloaded_packages’
Warning message:
installed directory not writable, cannot update packages 'boot', 'cluster',
'mgcv', 'spatial'


I have tried to google for this error message, but I wasn't able to find
anything useful. Would appreciate if someone could advise me on how to rectify
this issue.

Thank you.


Yours faithfully
Kee Pang

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