shiny | Easy interactive web applications with R | Data Visualization library

I've written and optimized a Shiny app, and now I'm struggling with the IT section of the organization where I work to have it published on their servers. Currently, they are claiming that the app is not W3C compliant, which is true, according to the W3C validator.

The errors I'm trying to solve, with no success, are:

• Bad value “complementary” for attribute “role” on element “form”.

• The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.

Such errors can be seen also in very minimal shiny apps, like:

I would like to display a scaled-up popup image on mouseover or on-click event on an image displayed in the rhandsontable cell similar to as shown here in DT table.

I would like to display the popup image for the image displayed in the table created as shown below:

This question is in the continuity of this one: Is it possible to stop executing of R code inside shiny (without stopping the shiny process)?.

The plot that I display in my app takes some time to produce, and I want the users to be able to stop its creation (for instance if they made a mistake in the options). I found this blog post about using callr in Shiny. The workflow is the following:

• create an empty list of jobs/plots
• clicking on "start" creates a background process to create the plot
  • if the user doesn't do anything, the plot is computed in the background. I use invalidateLater() every second to check if the background process is finished. If it is, then I display the plot.
  • if the user clicks on "stop" before the end of the process, the process is killed, removed from the list, and the previous plot is displayed (if there was no plot produced before, nothing is displayed)

First, I'm not sure how this would scale when several people use the app at the same time. Since every background process is independent, I don't think one user would be blocking the others, but I may be wrong.

Second, I'd like to show a waiting indicator on the plot. So far, I used the package waiter to do that, but the problem here is that renderPlot() is being invalidated every second to check if the background process is finished. Therefore, waiter appears and disappears repeatedly as the output is being invalidated.

Below is an example app that mimics the behavior I'd like to have:

With this code I can upload a csv file in my shiny app.

I recently created this post trying to figure out how to reference GitHub Secrets in a GitHub action. I believe I got that solved & figured out and I'm onto a different issue.

Below is a sample of the workflow code as of right now, the issue I need help with is the Create and populate .Renviron file part.

When I try to upload multiple .xpt files to show the tables in the main panel of the R shiny app, it gives me the following issue.

I am also looking at the filtering option. I would like to filter by columns while uploading multiple files so that the appropriate rows in the main panel of each data frame/datatable are displayed.

Error: Warning: Error in This kind of input is not handled

Can Someone help me for the solution?

code:

I want to create a clickable histogram in shiny but I don't know if it is possible.

Some months ago I saw a clickable volcano plot which gives you a table of what you click.

Source: https://2-bitbio.com/2017/12/clickable-volcano-plots-in-shiny.html

The closest post that I found about creating clickable histograms is this one Click to get coordinates from multiple histogram in shiny

However, I don't want to get the coordinates. I want the rownames of the dataframe.

Having this dataframe, can I get the rownames everytime I click a bar from the histogram?

I am making an app which can generate plots from input and it has no problem showing it on the UI but when I try to zip it by putting them into a temporary directory using ggsave() and use zip(), it doesn't work.

The example I have here generated the plot file in the temporary directory, but no zip file was generated. There is an extra directory in the temp dir which makes me think it has tried the process but somehow stopped.

Here is my code:

There are a number of different Q/A's regarding this topic on SO, but none that I have been able to find that fit my use-case. I am also very surprised that RStudio / the Shiny developers themselves have not come out with some documentation on how to do this. Regardless, take this example application: