Organisation des données avec des feuilles de calcul

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Saving an Excel file to CSV.
Saving an Excel file to CSV.

Figure 9

The risks of having commas inside comma-separated data.
The risks of having commas inside comma-separated data.

Figure 10

A typical data analysis workflow.
A typical data analysis workflow.

R et RStudio

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Exponential increase of the number of packages available on [CRAN](https://cran.r-project.org/), the Comprehensive R Archive Network. From the R Journal, Volume 10/2, December 2018.
Exponential increase of the number of packages available on CRAN, the Comprehensive R Archive Network. From the R Journal, Volume 10/2, December 2018.

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RStudio interface screenshot. Clockwise from top left: Source, Environment/History, Files/Plots/Packages/Help/Viewer, Console.
RStudio interface screenshot. Clockwise from top left: Source, Environment/History, Files/Plots/Packages/Help/Viewer, Console.

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Set 'Save workspace to .RData on exit' to 'Never'
Set ‘Save workspace to .RData on exit’ to ‘Never’

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Set the default text encoding to UTF-8 to save us headache in the coming future. (Figure from the link above).
Set the default text encoding to UTF-8 to save us headache in the coming future. (Figure from the link above).

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Example of a working directory structure.
Example of a working directory structure.

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How it should look like at the beginning of this lesson
How it should look like at the beginning of this lesson

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Directory structure for a sample bioinformatics project.
Directory structure for a sample bioinformatics project.

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RStudio help interface.
RStudio help interface.

Introduction à R

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Two normal distributions: *N(0, 1)* on the left and *N(100, 5)* on the right.
Two normal distributions: N(0, 1) on the left and N(100, 5) on the right.

Commencer par les données

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Manipulation et analyse de données avec dplyr

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Grand pivot des données `rna`.
Grand pivot des données rna.

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Pivot long des données `rna`.
Pivot long des données rna.

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Visualisation de données

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Successive layers added on top of each other.
Successive layers added on top of each other.

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Plotting boxplots (top) and histograms (bottom) vectors (left) or a matrices (right).
Plotting boxplots (top) and histograms (bottom) vectors (left) or a matrices (right).

Prochaines étapes

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