The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
Color Key: Serious technical mistake Minor technical mistake Language or formatting error Typo Question Note Update
| Version |
Location |
Description |
Submitted by |
Date submitted |
| Printed |
Page 13
Code block for exercise 5 |
In the printed version of the book (2021-04-29), the code sample for chapter 1 exercise 5 contains only two bugs, not three.
The source for the exercise on Github (https://github.com/hadley/mastering-shiny/blob/master/basic-app.Rmd) reads:
output$summmry <- renderPrint({
summary(dataset())
})
But in the printed version of the book, the misspelling has been corrected:
output$summary <- renderPrint({ # the misspelling has been corrected
summary(dataset())
})
|
Alex Stevens |
Jun 29, 2021 |
| Printed |
Page 45,47
Figure at top of pg 45/Figure at bottom of pg 47 |
I think that the figures 3-10 and 3-13 are swapped.
|
David Rhoda |
Jun 03, 2021 |
| Printed |
Page 145
Download example code |
I have been implementing the code in the examples given in the chapters. for the most part, they give what is expected. in the case of the downloading data example, we have included code in the example:
output$download <- downloadHandler(
filename = function(){
paste0(input$dataset,".tsv")
},
content = function(file){
vroom::vroom_write(data(), file)
}
)
I've taken this to mean that at least one of:
1) "<dataset>.tsv" will appear in the "download file" dialog box
2)"<dataset>.tsv" will be the name of the file saved
<dataset> is the value of input$dataset
Unfortunately, I have tried a few possible variations that have not resulted in either of these results. I do notice that the initial value in the filename field of the download file dialog box turns out to be the variable name assigned to the download button or download link (assuming this is matched by the corresponding "output$" value.
I wonder if there is something I'm missing or if the user will always be expected to supply the complete filename in the dialog box. If so, it would not be difficult to prompt the user to do so.
|
Patrick Mitchell |
Jul 27, 2021 |
| Printed |
Page 257
2nd paragraph code block |
The code block is identical to the previous version at the bottom of page 256, without the suggested proposed revision, "We could, of course, add session to the arguments of the function:...".
Should perhaps read:
switch_page <- function(i, session) {
updateTabsetPanel(input = 'wizard', selected = paste0('page_', i)
}
server <- function(input, output, session) {
observeEvent(input$page_12, switch_page(2, session))
etc.
|
Morris Johnson |
May 11, 2022 |