From cferna3@uic.edu  Thu Jun  8 19:54:19 2000
From: cferna3@uic.edu (Cheryl J Fernandes)
Date: Thu, 8 Jun 2000 13:54:19 -0500 (CDT)
Subject: [Rd] creating models from "Objects" in R's environment
Message-ID: <Pine.GSO.4.10.10006081350200.11509-100000@icarus.cc.uic.edu>

Hi
  I'm trying to create Tree based models in R using the downloadable
package called "tree".

  It is mentioned in the R documentation that Objects are created and 
stored in the R environment by name.

So I have saved all the objects formed during the creation of a tree model
using the R command:

dump(objects(),"Z:\\Project\\Exammples\\Output\\outputTree.txt");

Here's a snapshot of the output file outputTree.txt:


"hc" <-
structure(list(merge = structure(c(-1, -10, -12, -14, -18, -20, 
-22, -24, -26, -28, -30, -33, -36, -38, -40, -42, -44, -49, -52, 
-54, -56, -58, -60, -62, -64, -66, -68, -72, -74, -77, -80, -84, 
-88, -90, -93, -3, -4, -5, -46, -51, -95, -16, -35, -71, -76, 
80, 76, 83, 81, 85, 82, 89, 86, 88, 91, 93), .Dim = c(94, 2)), 
    height = c(0.00099999999999989, 0.00099999999999989,
0.00099999999999989, 
    0.00099999999999989, 0.00099999999999989, 0.00099999999999989, 
    0.00099999999999989, 0.00099999999999989, 0.00099999999999989, 
    0.00099999999999989, 0.00099999999999989, 0.00099999999999989, 
    0.00099999999999989, 0.00099999999999989, 0.00099999999999989, 
    0.0389999999999997, 0.0539999999999998, 0.0943398113205659
    ), order = c(79, 82, 83, 84, 85, 77, 78, 80, 81, 86, 92, 
    95, 93, 94, 90, 91, 87, 88, 89, 56, 57, 58, 59, 60, 61, 62, 
    34, 24, 25, 26, 27, 32, 28, 29), labels = c("1", "2", "3", 
    "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", 
  "85", "86", "87", "88", "89", "90", "91", "92", "93", "94", 
    "95"), method = "complete", call = hclust(d = dist(vegtest), 
        method = "complete"), dist.method = "euclidean"), .Names =
c("merge", 
	"height", "order", "labels", "method", "call", "dist.method"),
class = "hclust")
	"last.warning" <-
	structure(list("NAs introduced by coercion" = NULL), .Names = "NAs
introduced by 	        

coercion")
	"v.tr" <-
	structure(list(frame = structure(list(var = structure(c(2, 1, 
	2, 2, 2, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1), .Label =
c("<leaf>", 
	"Veg"), class = "factor"), n = c(95, 7, 88, 34, 22, 5, 17, 12, 
	5, 7, 54, 5, 49, 23, 9, 14, 26, 7, 19), dev =
c(0.00174753684210526, 
.
..
....


After creating the models, one needs to analyse them with some new data.
Hence, I am now trying to analyze this model with a new set of data.

Is it possible in R to recreate the models by reading from the "Object"
output file.
ie By reading from the above displayed file, can we recreate the tree
model ??

Any help/hints would be highly appreciated.

Thanks much 
Cheryl Fernandes

Cheryl Fernandes
Laboratory of Advanced Computing 
University of Illinois at Chicago.



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[Rd] creating models from "Objects" in R's environment
Cheryl J Fernandes