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.

Screenshot Simple 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	Description
`inputId`	`id` of html element
`value`	matrix
`inputClass`	`class` of html element (Class `matrix-input` is added automatically)
`rows`	`list` of parameters (see below)
`cols`	`list` of parameters (see below)
`class`	class of resulting matrix (`numeric` and `character`) is supported
`pagination`	Should the matrix be paginated (10 rows per page)
`lazy`	Lazy update data on server

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

Parameter	Description
`n`	number of rows (is calculated from `value` per default)
`names`	show row/colnames (names are taken from `value`)
`editableNames`	should row/colnames be editable?
`extend`	should rows/cols be automatically be added if table is filled to the last row / column?
`delta`	how many blank rows/cols should be added
`multiheader`	Display multiheader - currently only header spanning two columns are 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")