Your file seems to be encoded as UTF-8-BOM.
When I read it in on my Windows 10 machine the Title column has extra
characters at the front ("�..Title"), which is why your function returns "no
object found" when checking for the Title column.
If I resave your file with UTF-8 format your function works as expected and I
am able to install your package.
Gavin
________________________________
From: Bioc-devel <bioc-devel-boun...@r-project.org> on behalf of Murphy, Alan E
<a.mur...@imperial.ac.uk>
Sent: 02 March 2021 17:00
To: bioc-devel@r-project.org
Subject: [Bioc-devel] ExperimentHub package development - Windows OS specific
error
Hi all,
My apologies, I have emailed before on a related issue but now think I have
found a potential cause of the issue I am having but can't seem to find a fix.
I am working on an ExperimentHub data package;
ewceData<https://github.com/neurogenomics/ewceData>, which fails checks on
Windows OS but passes on Linux and Mac. On Windows, the package fails to
install with the following output:
Error: package or namespace load failed for 'ewceData':
.onLoad failed in loadNamespace() for 'ewceData', details:
call: fun(libname, pkgname)
error: no objects found
Error: loading failed
Execution halted
It seems like this error is caused by my onload function. The onload function I
use (zzz.R) should allow easy access to the stored datasets, allowing a user to
call the dataset like dataset1(). The error note printed appears because the
metadata.csv file did not read properly
.onLoad <- function(libname, pkgname) {
objs <- read.csv(system.file("extdata", "metadata.csv",
package="ewceData"),
stringsAsFactors=FALSE)$Title
if (!length(objs))
stop("no objects found")
It would seem the issue is with either read.csv or system.file and is specific
to Windows OS. Just to note I also do import read.csv from utils.
If anyone has come across an issue like this before or have good guesses for a
possible fix it would be greatly appreciated?
Kind regards,
Alan,
Alan Murphy
Bioinformatician
Neurogenomics lab
UK Dementia Research Institute
Imperial College London
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