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1. stackoverflow.com › questions › 18324397What's the difference between Reactive Value and Reactive ...

   stackoverflow.com › questions › 18324397

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   The key difference is the distinction they make in the Shiny documentation, between reactive "sources" and "conductors." In that terminology, reactive({...}) is a conductor, but reactiveValues can only be a source.

2. mastering-shiny.org › reactivity-objectsChapter 15 Reactive building blocks | Mastering Shiny

   mastering-shiny.org › reactivity-objects

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   Compare the syntax for getting and setting individual reactive values. l1 <- reactiveValues (a = 1, b = 2) l2 <- list (a = reactiveVal (1), b = reactiveVal (2)) Design and perform a small experiment to verify that reactiveVal() also has reference semantics.

3. rstudio.github.io › shiny › referenceCreate a (single) reactive value — reactiveVal • shiny

   rstudio.github.io › shiny › reference

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   The reactiveVal function is used to construct a "reactive value" object. This is an object used for reading and writing a value, like a variable, but with special capabilities for reactive programming.

4. forum.posit.co › t › reactivevalues-vs-reactive-andreactiveValues vs reactive and eventReactive: a general ...

   forum.posit.co › t › reactivevalues-vs-reactive-and

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   Apr 1, 2019 · reactiveValues and reactiveVal are super useful to handle events such as setting a counter that can control whether to show outputs and when. Below is the reactiveValues version but the reactiveVal would also do the job: library(shiny) library(shinyWidgets) shinyApp( ui = fluidPage( numericInput("n", "n", 1),

5. rstudio.github.io › shiny › referenceCreate a reactive expression — reactive • shiny

   rstudio.github.io › shiny › reference

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   Reactive expressions are expressions that can read reactive values and call other reactive expressions. Whenever a reactive value changes, any reactive expressions that depended on it are marked as "invalidated" and will automatically re-execute if necessary.

6. search.r-project.org › shiny › htmlR: Create a (single) reactive value - search.r-project.org

   search.r-project.org › shiny › html

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   The reactiveVal function is used to construct a "reactive value" object. This is an object used for reading and writing a value, like a variable, but with special capabilities for reactive programming.

7. People also ask

   What's the difference between reactive values and reactivevalues?

   • In that terminology, reactive({...}) is a conductor, but reactiveValues can only be a source. Here's how I think of reactiveValues - as a way to extend input which gets specified in UI.R. Sometimes, the slots in input are not enough, and we want derived values based on those input slots.

   r - What's the difference between Reactive Value and Reactive

   stackoverflow.com/questions/18324397/whats-the-difference-between-reactive-value-and-reactive-expression

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   What is a reactiveval object?

   • This is an object used for reading and writing a value, like a variable, but with special capabilities for reactive programming. When you read the value out of a reactiveVal object, the calling reactive expression takes a dependency, and when you change the value, it notifies any reactives that previously depended on that value.

   Create a (single) reactive value — reactiveVal • shiny - GitHub Pages

   rstudio.github.io/shiny/reference/reactiveVal.html

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   What is reactiveval function?

   • The reactiveVal function is used to construct a "reactive value" object. This is an object used for reading and writing a value, like a variable, but with special capabilities for reactive programming.

   Create a (single) reactive value — reactiveVal • shiny - GitHub Pages

   rstudio.github.io/shiny/reference/reactiveVal.html

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   How many types of reactive values are there?

   • There are two types of reactive values: A single reactive value, created by reactiveVal(). A list of reactive values, created by reactiveValues(). They have slightly different interfaces for getting and setting values: It’s unfortunate that these two similar objects have rather different interfaces, but there’s no way to standardise them.

   Chapter 15 Reactive building blocks | Mastering Shiny

   mastering-shiny.org/reactivity-objects.html

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8. rstudio.github.io › shiny › referenceCreate an object for storing reactive values — reactiveValues

   rstudio.github.io › shiny › reference

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   This function returns an object for storing reactive values. It is similar to a list, but with special capabilities for reactive programming. When you read a value from it, the calling reactive expression takes a reactive dependency on that value, and when you write to it, it notifies any reactive functions that depend on that value.