I made this flexdashboard: https://corona.berndschmidl.com/oesterreich/ which reads in data from Wikipedia and shows it. Till yesterday I was able to update the dashboard with restarting the shiny server. Now this doesn't work anymore. I'm aware that it has something to do with the cache but I tried everything I found here and on Google with no success. This is kind of important and therefore pretty frustrating.
Any help would be really appreciated.
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how are you. For a while I've been working for a Gynecologist building her a data base. For the project I am using Firebase and JavaScript. The database is for her to keep track of their patients and she keeps reports on each one of them. I am almost done with the job, the UI is almost finished, the core functionalities of the database (save data, delete, retreive, and update) are up and running but I am stuck in one little thing. She asked me for a way to turn those reports she keeps in the database into a format like PDF so she can print them and give them in case needed to her patients. The thing is that Ive tried with html2pdf, a git repository that works kind of clunky, and tried looking for others but I still cant find one that works correctly. So I wanted to ask you guys if you know of some alternatives. I started thinking about using EXCEl or Word document. But either way it seems quite complicated. Thank you for your time.
Best to all.
I was developing a shiny app when suddenly all plots and tables stopped rendering. There was no error message so it was very confusing what the problem was. I want to share the answer the solution just in case anyone else runs into the same problem!
I realised that I had two downloadButton()s and linked them both to the outputId="dl". Not only did it stop everything from rendering but also gave HTML downloads called qwe_download
I am not sure if I can show any reproducible example here, however let me narrate the issue I am facing with my Shiny app.
I have a Shiny app, which is basically data driven. All my required data is saved in an RData file which is placed in WWW folder. When user put my Shiny app's address (which is hosted on Amazon AWS) i.e. when my Shiny app starts, that RData file is loaded onto R, and then subsequent calculation starts.
The issue is that, my RData file is of quite huge size ~50MB. So R takes quite long time to load that onto memory. From User's perspective, he/she is not sure what is happening behind the screen, that makes some of them leave my App.
So I was thinking if I can put some progress bar to show User something is happening, as that Progress bar would be displayed only during the time when R is loading my RData file. I am aware of various Progress bar schemes available for Shiny, however as far as I know they are to display progress only during calculation (e.g. simulation) not during loading something.
Any idea if it is possible to put some Progress bar during loading RData, package etc?
Thanks for any pointer.
maybe a bit late but I share what I used, should it be useful for someone else.
Take a look at the shinycssloaders package (https://github.com/andrewsali/shinycssloaders).
By adding a simple function withSpinner and set a few parameters, you'll be able to set loader animations to Shiny apps. Furthermore you can select different spinners by looking at this link https://projects.lukehaas.me/css-loaders/.
I used it when I made this app: https://abenedetti.shinyapps.io/bioNPS/
Look at the Species Choropleth map section.
Edit:
Maybe this article and this app could help. Did you had a look at them?
Lately I have been making several very similar Shiny apps for different clients and hosting them on shinyapps.io.
Each app has a different title, different data, some differences in branding etc. but otherwise the code is very similar.
I'm having trouble maintaining these apps. When find and fix a bug I currently have to go through 5 different apps and make the change each time.
Does anyone have good suggestions on how to handle this? Git branches? I know the best solution would be to have one app and upload different data, but that's not possible unfortunately.
I'd like to keep using shinyapps.io, but I'm open to hosting the apps somewhere else if it makes my workflow better.
As I wrote in the comment shinyModules() will help you: https://shiny.rstudio.com/articles/modules.html
Shiny modules are to shiny functions, like ordinary functions are to repeating code.
Or to put it differently:
Repeating code --> function
repeating shiny function --> shiny module
As the documentation is a bit complicated here and there, i wrote a simplified example here:
Create a reactive function outside the shiny app.
You could store all the shiny modules in a file modules.R and add a global.R script to each of the apps that loads the modules (source("../modules.R"). Then you only have to update the functions within modules.R. That change of structure might take a while in the beginning. But, i think in the long run it pays off for more complex apps.
I ended up making a library that contained most of the code I needed for the apps, as suggested by Adam Spannbauer in the comments.
It's not perfect; I still have some duplication and I have to have the library on GitHub so that it will work with shinyapps.io. However, it's a big improvement on what I was doing previously.
I have created a report in Spotfire that appears fine in the software itself but when accessed through our web player it just presents a blank screen.
I have created another report, which works perfectly, using the same data table and the connection strings and login details are the same.
I've asked everyone here that uses Spotfire and nobody has seen the problem before. Any suggestions on what the problem may be or where I might try looking would be greatly appreciated!!
B
Thanks to those who looked at my quetsion - sorry it was a bit vague! Turns out it was a problem with the complexity of the report vs. the capability of our web player!