... This is most likely due to the fact that the precursor M/Z isn't exactly 808.5253. 808.5253 is probably a rounded up value that is shown as part of showing the spectrum object, and `==` returns `TRUE` when the two values are exactly identical. You would need to check the exact value of the M/Z value ...
... I have the following `DataFrame`
> k <- sample(3, 10, replace = TRUE)
> df <- DataFrame(k = k,
+ x = round(rnorm(length(k)), 2),
+ y = seq_len(length(k)),
+ z = sample(LETTERS, length(k), replace = TRUE),
+ ir = IRange ...
... Strange, and unlikely to be an `MSnbase` issue. Could you
1. restart R altogether
2. re-install with `BiocManager::install("MSnbase")`
3. load `library("MSnbase")`
If the above fails, could you provide the end of the installation output. ...
... What kind of quantitation are you planning to use? It will be a label-free approach, but depending on whether you want to use spectral counting or M1 label-free, you will need different software. You will also need to search your data against a protein database using a search engine (Mascot, MSGF+, ...
... Have you tried to install the package with
That would certainly help. ...
... Could you provide the output of `sessionInfo` please. This was addressed end of last year, which should be available in the latest devel (version 1.23.1). ...
... The `mzR` package is missing. The lines that tried to installed `RforProteomics` and `MSnbase` must have failed, as both depend on `mzR`.
To install `mzR` you will first have to install a system dependency, `ncdf4`, using your package manager. On ubuntu/debian, it should be `sudo apt install libn ...
... UCLouvain is recruiting a Research Logistician in Bioinformatics
- full-time with a permanent contract
- for the Louvain Institute of Biomolecular Science and Technology (LIBST)
- in Louvain-la-Neuve
**Context and organization**
The Research logistician in bioinformatics will be based in the Louv ...