Srinivas Iyyer wrote:> dear group,
>
> i have 100 files starting with 'hsa-*'.
>
> ex. file:
>
> fruit p-value
> ------------
> apple 0.0003
> orange 0.004
> kiwi 0.0003
> peach 0.0004
>
>
>
> I want to read all these files and create a single
> matrix. here each file may have different fruit names.
>
> in the matrix i want to have a union of all fruits and
> those should be the rows in the matrix and file names
> should be columns.
>
> ex;
> hsa-1 hsa-2 hsa-3 hsa-4 hsa-5
> apple 0.003 0.01 0.002 0.002 0.002
> orange 0.003 0.01 0.002 0.002 0.002
> kiwi 0.003 0.01 0.002 0.002 0.002
> peach 0.003 0.01 0.002 0.002 0.002
> banana 0.003 0.01 0.008 0.002 0.001
> plum 0.003 0.01 0.009 0.002 0.005
> mango 0.003 0.001 0.002 0.002 0.008
>
>
> could any one help me please.
This is a FAQ, more or less, please read the FAQs as the posting guide
asks you to do.
Use
myFiles <- list.files( ..., pattern="^hsa-")
to get the filenames, loop ober the files and insert the values into you
matrix or data.frame.
Uwe Ligges
> thank you.
>
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http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.