nfultz

# An example based on http://shiny.rstudio.com/articles/dynamic-ui.html

library(shiny)

ui = basicPage(
  fluidRow(
    actionButton(inputId = "add_buttons", label = "Add 5 Buttons")
  ),
  uiOutput("more_buttons") # this is where the dynamically added buttons will go
)

nfultz

If you have a huge repository (in size and in history) and want to add a subfolder 
to your project as a submodule you can follow this example to save time and space
using git's shallow clone and shallow checkout feature. It is a bit more complicated
in this example because I assume that you want your submodule to track a non-default
branch, called `mybranch`, instead of the `master` branch. Things could probably get
a lot simpler when using the default branch. After following the commands in these
examples you can use `git submodule update` and `git submodule update --remote` as normal.

nfultz

ipoptr_qp <- function(Dmat, dvec, Amat, bvec, ub=100){
  # Solve the quadratic program
  #
  # min -d^T x + 1/2 x^T D x
  #   s.t. A%*%x>= b
  #
  # with ipoptr.
  
  n <- length(bvec)
  # Jacobian structural components