shinydashboard | Shiny Dashboarding framework | Data Visualization library

I'm trying to make custom valueboxes in R Shiny. I've discovered how to change the color of the background, but something is making my value boxes stubby and leaving large gaps in between them. I'd like to display 3 on a line ideally, but even with a width of 4, they appear squished. How can I get them to have more of the red with just a small gap of white in between.

Below is a reproducible example as well as a screenshot.

I'm doing a project on Shiny where there are several drop-down menus. The options contained in the menus are stored in a data frame and when running the app you have the option to add more data to the data frame. The behavior I expected was that the options in the drop-down menu would automatically update with changes in the data frame, but this doesn't happen.

Is this possible to be done in Shiny? If yes, how?

Here's a code with an example of how I'm doing.

I get this most common error message in shiny app. I am well aware of this error and have resolved it dozens of time. But this time I am stumped.

I am using below code and try to do below action.

1. Click on action button to go to next table. How can I do this?

As the title says. I have entered the code exactly as it is the book, but I run into this error message: "Error in shiny::tabsetPanel(..., id=id, selected = selected) : argument is missing, with no default"

I have no idea what is missing.

Here is the code:

I wrote the shiny app bellow and it is working that way. It is a simple control to select a material from a list (a column from a tibble) and then output a table containing all the columns from that tibble, but just the row corresponding to the selected material. What I don't understand is why I have to create the reactive value (that I named "materialInfo") on the server function in order to update tableOutput("materialInfo") on the dashboardBody.

Why won't simply output$materialInfo <- Material %>% filter({Material == input$matId}) %>% renderTable() do the job? Any ideas? tks

I'm trying to build a shiny app that filters a data frame based on user entries, however, i'm struggling using a function I created to do this task, the error Problem with 'filter()' input '..1'. x Input '..1' must be of size 9 or 1, not size 0. keeps apperaring. I found a similar issue here but the answer didn't help.

Here's my code. And also here are the xlsx and csv files with example data.

I appreciate a lot your help

UPDATE: I've found a mistake - I used plotOutput instead of plotlyOutput. All is fine now.

I want to build a Shiny dashboard that does something like that:

• takes a dataset with a numeric variable value
• uses Numeric Input widget to obtain a numeric value
• creates new variable value2=value*number provided in the Numeric Input box
• plots a bar chart

The sample code is below. It correctly places the Numeric Input box, but the chart does not appear (the box where the chart is supposed to be is completely empty). Why?

Im trying to get rid of the empty space, especially over my plotly chart using margin but I cant. Ideally I would like no empty space all around my chart but especially the top one is very annoying.