Added code to call matlab

NAMESPACE

@@ -2,3 +2,4 @@ S3method(print,runr_results)
 export(proc_bash)
 export(proc_julia)
 export(proc_python)
+export(proc_matlab)

R/matlab.R

@@ -0,0 +1,59 @@
+#' Run a matlab process
+#'
+#' This function returns a list of functions to start/run/stop a matlab process.
+#' The code is sent to matlab via a socket connection, and the results are
+#' written back in another socket connection.
+#' @param port A TCP port number
+#' @return A list of functions \code{start()}, \code{exec()}, \code{running()}
+#'   (check if the process has been running), and \code{stop()}.
+#' @export
+#' @examples \dontrun{
+#' mat = proc_matlab()
+#' mat$start()
+#' mat$exec('1+1')
+#' mat$exec('x = 1 + 1; x = x + x; x;') # return nothing
+#' mat$exec('5:9') # [     5     6     7     8     9]
+#' mat$running() # should be TRUE
+#' mat$stop()
+#' }
+
+proc_matlab <- function(port = 6011, existing=FALSE){
+  require(R.matlab)
+  matlab <- NULL
+  exec_code = function(...){
+    if (is.null(matlab)) stop('the process has not been started yet')
+    code = as.character(c(...))
+    code = unlist(strsplit(code, "\n"))
+    result <- sapply(code, function(x) evaluatec(matlab, x))
+    return(do.call(paste, c(as.list(result), sep = "\n")))
+  }
+
+  list(
+    start = function() {
+      if (!is.null(matlab)) {
+        warning('the program has been started')
+        return(invisible())
+      }
+      Matlab$startServer(port=port)
+      matlab <<- Matlab(port=port)
+      isOpen <- open(matlab, trials=30, interval = 0, timeout = 1)
+      if(!isOpen)
+      {
+        stop("Unable to connect to matlab server")
+      }
+      invisible()
+    },
+
+    exec = exec_code,
+
+    running = function() !is.null(matlab),
+
+    stop = function() {
+      close(matlab)
+      matlab <<- NULL
+      invisible()
+    }
+  )
+}
+
+