visr.param: Add app parameter
In hyounesy/bioc2016.visrseq: Materials for VisRseq Workshop at BioC2016 Conference

Description Usage Arguments Examples

Adds a new parameter to the curent app.

visr.param(name, label = NULL, info = NULL, type = c("string",
  "character", "int", "integer", "double", "boolean", "logical", "multi-string",
  "column", "multi-column", "column-numerical", "multi-column-numerical",
  "color", "multi-color", "filename", "output-column", "output-multi-column",
  "output-table"), default = NULL, min = NULL, max = NULL, items = NULL,
  item.labels = NULL, filename.mode = c("load", "save", "dir"),
  debugvalue = NULL)

`name`	Parameter name. will be appended to "visr.param." to create the full variable name in R.
`label`	The label for the parameter's GUI control. Will use variable name if not specified (NULL).
`info`	Additional information about parameter. Will be shown as tooltip in VisRseq.
`type`	Parameter type
`default`	Initial default value for the parameter.
`min`	Minimum value for numerical type parameters (`"int"`, `"double"`)
`max`	Maximum value for numerical type parameters (`"int"`, `"double"`)
`items`	Specify a vector of items for a `"string"` variable to select from.
`item.labels`	Specify a vector of items to be used as the labels for `items` argument.
`filename.mode`	Specify the file dialog mode (file load, file save or directory) for a `"filename"` type parameter
`debugvalue`	The value to be assigned to the R variable in debug mode. Useful for unit testing.

visr.param("k", type = "integer") # specify type
visr.param("k", default = 3L) # will infer type from default value
visr.param("k", label = "number of clusters")  # explicitly specify label
visr.param("title") # no type or default value: treated as a "string" type
visr.param("algorithm", items = c("Hartigan-Wong", "Lloyd", "Forgy", "MacQueen"))
visr.param("columns", type = "multi-column-numerical")
visr.param("output.clusterid", type = "output-column") # column appended to input table