How to list only certain files in R? -

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i have thousands of different files (having same extension .img) in folder called data. if use :

 dir<- list.files ("c:\\users\\data", "*.img", full.names = true)

it list files have in folder data.

what need list files named as:

 file_yyyymmdd_data.img     (in yyyymmdd varies 10 years)

any idea or hint appreciated!

try this

files.new = list.files(directory.path, recursive = true, pattern=".img")

where, "directory.path" path directory containing files need read

edited

to more appropriate 

files.new = list.files(directory.path, recursive = true, pattern="file_[0-9]{8}_data[.]img$")

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