[R] diff doesnot work

george brida george.brida at gmail.com
Mon Feb 6 23:21:49 CET 2017

Dear R users,

I have a txt file entitled coc composed by one column of numeric values
without header and having 50 rows. This file is under the following path:


I have written the following lines:


I have obtained the series xc but when I wrote

I obtained the following message:

data frame with 0 columns and 50 rows

I don't know where is the problem. Can you help me please

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