dyPencilgraphs for R

The dyPencilgraphs extends the dygraphs package to do a simple function whereby you can input a curve using a pencil drawing tool. This also binds the values of the curve to the input$variable of your shiny application. The dygraphs javascript example from which this was constructed can be found under the dygraphs gallery

Installation

The dyPencilgraphs package depends on the dygraphs package and the development version of the htmlwidgets package so you need to install both packages. You can do this using the devtools package as follows:

devtools::install_github(c("ramnathv/htmlwidgets", "rstudio/dygraphs","albre116/DygraphsPencil"))

Usage

If you have an xts-compatible time-series object creating an interactive plot where you can drag the mouse to alter the data is as simple as this:

dyPencilgraph(ts, "Deaths from Lung Disease (UK)")

You can also further customize axes and series display as well as add interacitve features like a range selector. As a note, with dyPencilGraphs you can only plot 1 series:

    dyPencilgraph(ts, "Deaths from Lung Disease (UK)") %>%  ###you can only do 1 series or it will fail
      dySeries("V1","Deaths",fillGraph=T) %>%
      dyAxis("y",valueRange=c(min(ts),max(ts))) %>% ###you must specify the y values range or it will fail
      dyRangeSelector()

See the dygraphs gallery for the dygraphs package for additional details and examples.