Matrix Input for Shiny

Matrix Input for Shiny

This package provides an input field to enter matrix conveniently in a shiny application. It supports tabbing and jumping linewise in the matrix.

Installation

From CRAN:

install.packages("shinyMatrix")

From GitHub:

if (require("devtools")) install_github("INWTlab/shiny-matrix")

Usage

UI

The input field is generated by the function matrixInput

matrixInput <- function(inputId,
                        value = matrix("", 1, 1),
                        inputClass = "",
                        rows = list(),
                        cols = list(),
                        class = "character"
                        pagination = FALSE,
                        lazy = FALSE){
  [...]
}

You can define parameters as follows:

Parameter rows / cols take a list of arguments. The following is supported

Call the matrixInput function in your UI generating, e.g. ui.R

## numeric matrix
matrixInput("matrix1", class = "numeric")

## editable rownames
matrixInput("matrix2",
  rows = list(
    names = TRUE,
    editableNames = TRUE),
  data = matrix(letters[1:12], 3, 4)
)

Get value

You can access the value from the matrix input using input$inputId in your server function. The result will always be a matrix of the class defined in matrixInput.

Update Input Field

You can update the input field using updateMatrixInput

updateMatrixInput(session, inputId, value = NULL)

value is the data object. In the future there should be also support to update the other parameters.

Example Apps

You find the code for the example app in inst/appXXX.

Basic functionality

• Fixed matrix width
• Editable matrix content
• No column and rownames

Use the matrix on the left to input values, matrix on the right displays the result.

library(shinyMatrix)

startApplication("app")

Update Matrix Input from R

• Generate a random matrix within the shiny server function by clicking on "Update Matrix"
• The matrixInput field gets updated with updateMatrixInput from R

startApplication("appUpdate")

Editable row and column names

• Edit row and column names by clicking on the cell
• The result will be shown on the right

startApplication("appRownames")

Uneditable cells

• Make table cells uneditable
• No clicking into cells, no changing values

startApplication("appUneditableCells")

Extend Matrix Automatically

• If matrix is full (last row and columns contain values) rows and columns are added automatically

startApplication("appExtend")

Custom Column Header

• Replace default header with a multiheader
• Automatically add 2 columns if matrix is full

startApplication("appDoubleHeader")

Delete Rows and Columns

• add a button to delete rows and columns. This also works for multiheader.

startApplication("appDelete")

Lazy Update of server values

• Only update data on server when no input field is visible

startApplication("appLazy")