Package 'gradientPickerD3'

gradientPickerD3

Description

Creates a widget for an interactive selection and modification of a color gradient. gradientPickerD3 allows the addition, removement and replacement of color ticks. List of numeric values will automatically translate in its corresponding tick position within the numeric range. App returns a R data.frame containing tick values, colors and the positions in percent (0.0 to 1.0) for each color tick in the gradient. The original JS 'jquery-gradient-picker' was implemented by Matt Crinklaw-Vogt. Widget and JS modifications were done by CD. Peikert.

Usage

gradientPickerD3(payload, width = NULL, height = NULL, elementId = NULL,
  border_extensions = 0.001, decimal_places = 8)

Arguments

payload	list containing 'ticks' and 'colors' to initialize the gradient. Ticks have to been numerical and in a logical order. Colors can be provided as R colors or HEX format.
width, height	must be a valid CSS unit (like '100%')
elementId	string id as a valid CSS element id
border_extensions	add to the min and max data range to cover the whole color spectrum
decimal_places	number of decimal places

Source

The interface was designed based on jquery-gradient-picker https://github.com/tantaman/jquery-gradient-picker, htmlwidgets and shiny

See Also

gradientPickerD3_example

Examples

ticks <- c(-1.8740103,  -0.0040747,  1.4022244,  2.2177949,  3.2116766)
payload <- list(
  colors=c("purple","blue", "green", "yellow", "red"),
  ticks=ticks
)
gradientPickerD3(payload)

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gradientPickerD3_example

Description

Creates an example shiny app which include the gradientPickerD3 and a rendered table for gradientPickerD3 return value. By clicking the reload button new random ticks will be generated.

Usage

gradientPickerD3_example()

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Shiny bindings for gradientPickerD3

Description

Output and render functions for using gradientPickerD3 within Shiny applications and interactive Rmd documents.

Usage

gradientPickerD3Output(outputId, width = "100%", height = "100%")

renderGradientPickerD3(expr, env = parent.frame(), quoted = FALSE)

Arguments

outputId	output variable to read from
width, height	Must be a valid CSS unit (like '100%', '400px', 'auto') or a number, which will be coerced to a string and have 'px' appended.
expr	An expression that generates a gradientPickerD3
env	The environment in which to evaluate expr.
quoted	Is expr a quoted expression (with quote())? This is useful if you want to save an expression in a variable.

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