The goal of flexdashboard is to make it easy to create interactive dashboards for R, using R Markdown.
Use R Markdown to publish a group of related data visualizations as a dashboard.
Support for a wide variety of components including htmlwidgets; base, lattice, and grid graphics; tabular data; gauges and value boxes; and text annotations.
Flexible and easy to specify row and column-based layouts. Components are intelligently re-sized to fill the browser and adapted for display on mobile devices.
Storyboard layouts for presenting sequences of visualizations and related commentary.
Optionally use Shiny to drive visualizations dynamically.
Learn more about flexdashboard: https://flexdashboard.rmarkdown.io
Install the flexdashboard package from CRAN as follows:
install.packages("flexdashboard")
To author a flexdashboard you create an R Markdown document with the flexdashboard::flex_dashboard output format. You can do this from within RStudio using the New R Markdown dialog:

If you are not using RStudio, you can create a new flexdashboard R Markdown file from the R console:
rmarkdown::draft("dashboard.Rmd", template = "flex_dashboard", package = "flexdashboard")
There are two main places to get help with flexdashboard:
The RStudio community is a friendly place to ask any questions about flexdashboard.
Stack Overflow is a great source of answers to common flexdashboard questions. It is also a great place to get help, once you have created a reproducible example that illustrates your problem.