Chapter 19 Multiple choice questions

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. Which line of code is most easily understood by someone other than the original programmer?

sl <- 1:10 correct incorrect

stimuluslevels <- 1:10 correct incorrect

sl <- 1:10 # store all of the stimulus levels correct incorrect

stimuluslevels <- 1:10 # store all of the stimulus levels correct incorrect

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. Before committing code changes to GitHub, what do you need to do?

stage the changes correct incorrect

pull the changes correct incorrect

push the changes correct incorrect

Delete the original code in the repository correct incorrect

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. Which object name is written in Dromedary case?

dataaboutcamels correct incorrect

dataAboutCamels correct incorrect

DataAboutCamels correct incorrect

Dataaboutcamels correct incorrect

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. Which of the following DOI numbers links to a publicly available data set? (You can use the website dx.doi.org to resolve them)

10.1037/met0000337 correct incorrect

10.2871/433783 correct incorrect

10.17605/OSF.IO/E62WU correct incorrect

10.1371/journal.pcbi.1009507.g002 correct incorrect

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. Install the osfr package as described on page 309. Retrieve details of the node ebhnk using the osf_retrieve_node function, and list its subnodes with osf_ls_nodes function. How many sub-nodes are there? (Note you do not need to set up an authentication token to access public files).

1 correct incorrect

3 correct incorrect

10 correct incorrect

15 correct incorrect

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. Download the list of files for the 6^th node, entitled "EEG: event-related potentials". What is the name of the figure in this node?

Figure5.pdf correct incorrect

Figure10.pdf correct incorrect

Figure1.jpg correct incorrect

Figure7.png correct incorrect

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. Use the osf_download function to download the file powercontoursERP.R. Open the script. How many lines does it contain?

312 correct incorrect

457 correct incorrect

519 correct incorrect

697 correct incorrect

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. Install the hdf5r package and look at the documentation. Which line of code would use to create a new hdf5 format file?

writeHDF5(filename) correct incorrect

H5File$new(filename, mode="w") correct incorrect

H5File$new(filename, mode="r+") correct incorrect

write.hdf(filename) correct incorrect

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. How could you reduce the file size of some data stored in csv format?

Remove all commas in the file correct incorrect

Encrypt the data using a public key correct incorrect

Use a proprietary data format instead correct incorrect

Use zip or gzip to compress the file correct incorrect

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. Which of the following would NOT typically be stored in a metadata file:

Information about the conditions in an experiment correct incorrect

Information about the equipment used to collect the data correct incorrect

Personal details of the participants in the experiment correct incorrect

Licensing and sharing information for the data set correct incorrect