[Rd] read.csv, worrying behaviour?

[TAYLOR, Benjamin (BLACKPOOL TEACHING HOSPITALS NHS FOUNDATION TRUST)]

Dear all

I've been using R for around 16 years now and I've only just become aware of a behaviour of read.csv that I find worrying which is why I'm contacting this list. A simplified example of the behaviour is as follows

I created a "test.csv" file containing the following lines:

a,b,c,d,e,f,g
1,2,3,4

And then read it into R using:

> d = read.csv("test.csv")
> d
  a b c d  e  f  g
1 1 2 3 4 NA NA NA

I was surprised that this did not issue a warning. I can understand why the following csv would not issue a warning:

a,b,c,d,e,f,g
1,2,3,4,,,

But the missing commas in the first example? Thoughts from others would be welcome.

Kind regards

Ben


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Benjamin M. Taylor, MSci, MSc, PhD
Lead Data Scientist
Blackpool Teaching Hospitals NHS Foundation Trust
Home 15
Whinney Heys Road
Blackpool
FY3 8NR

Scholar: https://scholar.google.co.uk/citations?user=6Hf0CJkAAAAJ&hl=en
Github: https://github.com/bentaylor1
Gitlab: https://gitlab.com/ben_taylor
ORCID: http://orcid.org/0000-0001-8667-4089



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