November 2024
Intermediate to advanced
372 pages
9h 2m
French
Content preview from Maîtriser la brillance
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapitre 12. L'évaluation Tidy
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Si tu utilises Shiny avec le tidyverse, tu rencontreras presque certainement le défi de programmer avec l'évaluation tidy. L'évaluation tidy est utilisée dans tout le tidyverse pour rendre l'exploration interactive des données plus fluide, mais elle a un coût : il est difficile de faire référence à des variables de façon indirecte et donc plus difficile de programmer avec.
Dans ce chapitre, tu apprendras comment envelopper les fonctions ggplot2 et dplyr dans une application Shiny. (Si tu n'utilises pas le tidyverse, tu peux sauter ce chapitre 
.) Les techniques pour intégrer les fonctions ggplot2 et dplyr dans d'autres fonctions ou dans un package sont un peu différentes et sont abordées dans d'autres ressources comme Using ggplot2 in Packages (Utiliser ggplot2 dans les packages) ou Programming with dplyr (Programmer avec dplyr). Commençons :
library(shiny)library(dplyr,warn.conflicts=FALSE)library(ggplot2)
Motivation
Imagine Je veux créer une application qui te permette de filtrer une variable numérique pour sélectionner les lignes qui sont supérieures à un seuil. Tu pourrais écrire quelque chose comme ceci :
num_vars<-c("carat","depth","table","price","x","y","z")ui<-fluidPage(selectInput("var","Variable" ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.