[Rd] Summary methods

From: Doran, Harold <HDoran_at_air.org>
Date: Sun, 08 Nov 2009 15:26:28 -0500


I've defined the following for objects of a class called jml

summary.jml <- function(object, ...){

	tab <- cbind(Estimate = coef(object),
			StdError = object$se,
			Infit = object$Infit, 
			Outfit = object$Outfit)	
	res <- list(call = object$call, coefficients = tab, 
			N = nrow(object$Data), iter = object$Iterations)
	class(res) <- "summary.jml"
	res

}

print.summary.jml <- function(x, ...){

   cat("Call:\n")
   print(x$call)

   cat("\n")
   cat("Number of iterations to completion:", x$iter, "\n")
   cat("Number of individuals used in estimation:", x$N, "\n")
   cat("\n")

   printCoefmat(x$coefficients)
   }

Use of the methods on a fitted jml object yields:

> summary(aa)
Call:
jml2.formula(formula = ~V1 + V2 + V3 + V4 + V5 + V6 + V7 + V8 +

    V9 + V10, data = itemDat, bias = F)

Number of iterations to completion: 6
Number of individuals used in estimation: 486

                 StdError     Infit Outfit

[1,] -0.380346 0.103002 1.007466 0.9935
[2,] 0.025939 0.104052 1.003050 1.0083
[3,] 2.563784 0.171174 0.941453 0.9414
[4,] -2.930519 0.156923 1.010786 1.0515

[5,] 1.139241 0.118932 0.978101 1.1424
[6,] -1.461751 0.111563 1.030612 1.2709
[7,] 0.486202 0.107986 1.008374 1.0394
[8,] -0.497102 0.103117 0.961431 0.9012
[9,] -0.486478 0.103099 1.001752 0.9829
[10,] 1.541029 0.129214 1.010011 0.9150

Two questions. First, why is the name of the first column empty instead of "Estimate" as I have specified in the summary method? Second, I am struggling to get the row names of the coefficients to align with the formula call. For example, instead of

                 StdError     Infit Outfit

[1,] -0.380346 0.103002 1.007466 0.9935

I would prefer

                 StdError     Infit Outfit
 V1 -0.380346 0.103002 1.007466 0.9935

This also occurs in my print method

print.jml <- function(x, digits = 2, ...){

   cat("\nCall:\n", deparse(x$call), "\n\n", sep = "")    cat("Coefficients:\n")

		print.default(format(coef(x), digits = digits), print.gap=2,
		quote = FALSE)

   invisible(x)
   }

Which produces

> win
Call:
jml2.default(dat = itemDat[, 1:10])

Coefficients:

             [,1]
[1,] -0.38034638
[2,] 0.02593937
[3,] 2.56378422
[4,] -2.93051899
[5,] 1.13924076
[6,] -1.46175119
[7,] 0.48620247
[8,] -0.49710150
[9,] -0.48647770

[10,] 1.54102895

Thank you
Harold

> sessionInfo()
R version 2.10.0 (2009-10-26)
i386-pc-mingw32

locale:

[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] MASS_7.3-3         lme4_0.999375-32   Matrix_0.999375-31 lattice_0.17-26   
[5] MiscPsycho_1.4     statmod_1.4.1     

loaded via a namespace (and not attached): [1] grid_2.10.0 plink_1.2-2 tools_2.10.0



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https://stat.ethz.ch/mailman/listinfo/r-devel Received on Sun 08 Nov 2009 - 20:32:30 GMT

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