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The recording of today is available.
Webex meeting recording: First steps with R - Day 1
Password: pDepq8Y9
Recording link: https://unilu.webex.com/unilu/ldr.php?RCID=9bd40106e99145a286c98b65c9fb00bb
This is for you only, please do not share or download and distribute recordings.
Webex meeting recording: First steps with R - Day 1
Password: pDepq8Y9
Recording link: https://unilu.webex.com/unilu/ldr.php?RCID=9bd40106e99145a286c98b65c9fb00bb
This is for you only, please do not share or download and distribute recordings.
Recording for "First steps with R - Day 2"
Password: kPBQpMZ8
Recording link: https://unilu.webex.com/unilu/ldr.php?RCID=e55a8954191e28c447a1eb827488984c
Password: kPBQpMZ8
Recording link: https://unilu.webex.com/unilu/ldr.php?RCID=e55a8954191e28c447a1eb827488984c
When you get a message "No such file or directory" check:
- if the file is in the directory (folder) that you are using in the file path,
- if the file name matches the name in the folder,
- if your working directory is the upper level to the folder you are addressing in the file path , in this case "R-intro" for the "data".
To check your working directory you can rungetwd()in the console, to set a working directory you can usesetwd( "file-path-to-the-desired-directory")or in the interface. In the interface in the pane with all folders and files, you should go to the folder you want as a working directory, click above the pane on the "More" and then select "Set as a working directory"
Also noteworthy to mention: In R (as pretty much all other programming environments) everything is case sensitive. The file "data.csv" cannot be imported by `read.csv("DATA.csv"). If you are using Windows, you might be used to not caring about this because the Windows operating system takes care of that.
Pipe tip:
If you're tired of inserting the pipe symbols, you can also use the RStudio shortcut ^M (Control-Shift-M) to insert the pipe symbol. In the Code section of Options in RStudio you can select if you prefer the base pipe (|>) or the magrittr pipe (%>%, needs the package installed and loaded).
If you're tired of inserting the pipe symbols, you can also use the RStudio shortcut ^M (Control-Shift-M) to insert the pipe symbol. In the Code section of Options in RStudio you can select if you prefer the base pipe (|>) or the magrittr pipe (%>%, needs the package installed and loaded).
ggsave tip:
- To save a png without saving the plot into an object
ggplot(data = airquality,
mapping = aes(x = Month,
y = Ozone))+
geom_boxplot()
ggsave(
"plots/air_plot.png",
plot = last_plot())
- To save a plot into an object and then save it in a directory we have to follow the arguments order in a function or to specify them
p <- ggplot(data = airquality,
mapping = aes(x = Month,
y = Ozone))+
geom_boxplot()
ggsave(plot= p, "plots/air_plot2.png", device = "png")
Info on practical submission
Please complete and submit the "Last_practical.R" script to veronica.codoni@uni.lu
The submission deadline is Today, 29th July 7.00 PM CET
Please complete and submit the "Last_practical.R" script to veronica.codoni@uni.lu
The submission deadline is Today, 29th July 7.00 PM CET
Dear learners,
we release the solutions for Exercises Day 3
Good luck 🍀 for the concluding practical !
Recording of today: First steps with R - Day 3
Password: HpfTRi2p
Recording link: https://unilu.webex.com/unilu/ldr.php?RCID=8648b16691c55125152c0f024a6e0fbb
Password: HpfTRi2p
Recording link: https://unilu.webex.com/unilu/ldr.php?RCID=8648b16691c55125152c0f024a6e0fbb