[R] automating a script to read a file

[Petr Savicky]

On Mon, Apr 23, 2012 at 04:02:45PM -0400, Steve_Friedman at nps.gov wrote:
> 
> Hi,
> 
> 
> The following script (which I did not develop) is used to calculate and
> plot a skewed normal curve.  The script currently requires the user to
> input six parameters, rather than reading these directly from a file.
> 
> I've been spinning wheels here, trying to figure out how to modify the
> script to automate it.  I have four data sets, each in excess of 300
> records that I need to process.
> 
> My initial thoughts were to use the  lapply and use a pdf graphic device to
> capture the plots to do this, but my R programming skills are too limited
> to determine how to best accomplish this.

Hi.

If you read the parameters from a file and put them to a matrix,
then all the plots may be produced using a loop like the following.

  #some parameters
  p <- matrix(1:18, nrow=3, ncol=6)
  for (i in 1:nrow(p)) {
      plot.spdf(p[i, 1], p[i, 2], p[i, 3], p[i, 4], p[i, 5], p[i, 6])
      readline("press Enter to continue")
  }

If you use pdf() for sending the graphics to a file, then remove
the "readline" command.

Hope this helps.

Petr Savicky.