# [R] Reliability metric

William Dunlap wdunlap at tibco.com
Fri Sep 9 22:52:14 CEST 2011

```I may be wrong, but I thought the original poster
was trying to make a matrix ('metric' sp.) of values,
R, so that
R[i,j] == f(t[i], h[i])
for all i and j where
f <- function(t, h)exp(-(t/eta*(1-h))^(beta*(1-h))
outer() would do that:
R <- outer(t, h, function(t, h)exp(-(t/eta*(1-h))^(beta*(1-h))))
It dimensions are length(t) by length(h), 111 by 9, not the
110 by 10 mentioned in the post.

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of David Winsemius
> Sent: Friday, September 09, 2011 1:25 PM
> To: Halabi, Anan
> Cc: r-help at R-project.org
> Subject: Re: [R] Reliability metric
> Importance: High
>
>
> On Sep 9, 2011, at 3:14 PM, Halabi, Anan wrote:
>
> >
> > Hi,
> > Below is the code I write,
> > I am trying to create a metric of h and t while the values is out of
> > function R.
> > First I have message warning
>
> It is only a warning.
>
> > Second, the metric is not created
>
> What "not created" means has already been question by Weylandt. What
> you seem to have missed in your introductory material is the concept
> of "recycling of arguments". Look at this code and its results:
>
>  > (1:10) * (1:2)
> # [1]  1  4  3  8  5 12  7 16  9 20
>
>  > (1:10) * (1:3)
> # [1]  1  4  9  4 10 18  7 16 27 10
> Warning message:
> In (1:10) * (1:3) :
>    longer object length is not a multiple of shorter object length
>
> --
> David.
> >
> >
> >> h <- seq(0.1, 0.9, by=0.1)
> >> t <- seq(0,11000, by=100)
> >> z <- cbind(t)
> >> eta=10000
> >> beta=2
> >> R <- array (1:1100, dim= c(110,10))
> >> R= exp(-(z/eta*(1-h))^(beta*(1-h)))
> > Warning messages:
> > 1: In z/eta * (1 - h) :
> >  longer object length is not a multiple of shorter object length
> > 2: In (z/eta * (1 - h))^(beta * (1 - h)) :
> >  longer object length is not a multiple of shorter object length
> >> R
> >               t
> >  [1,] 1.0000000
> >  [2,] 0.9995586
> >  [3,] 0.9974647
> >  [4,] 0.9919725
> >  [5,] 0.9801987
> >  [6,] 0.9572081
> >  [7,] 0.9141353
> >  [8,] 0.8341665
> >  [9,] 0.6833618
> > [10,] 0.9892125
> > [11,] 0.9825766
> > [12,] 0.9727664
> > [13,] 0.9583520
> > [14,] 0.9370675
> > [15,] 0.9051390
> > [16,] 0.8559267
> > [17,] 0.7769472
> > [18,] 0.6423128
> > [19,] 0.9629361
> > [20,] 0.9521001
> > [21,] 0.9382259
> > [22,] 0.9201104
> > [23,] 0.8958341
> > [24,] 0.8622051
> > [25,] 0.8136275
> > [26,] 0.7395534
> > [27,] 0.6175830
> > [28,] 0.9246320
> > [29,] 0.9127580
> > [30,] 0.8982795
> > [31,] 0.8800821
> > [32,] 0.8564152
> > [33,] 0.8244048
> > [34,] 0.7790512
> > [35,] 0.7109198
> > [36,] 0.5996181
> > [37,] 0.8767646
> > [38,] 0.8671159
> > [39,] 0.8550329
> > [40,] 0.8394499
> > [41,] 0.8187308
> > [42,] 0.7902253
> > [43,] 0.7493487
> > [44,] 0.6874269
> > [45,] 0.5854263
> > [46,] 0.8215803
> > [47,] 0.8170930
> > [48,] 0.8098560
> > [49,] 0.7988930
> > [50,] 0.7827045
> > [51,] 0.7588540
> > [52,] 0.7231046
> > [53,] 0.6673758
> > [54,] 0.5736597
> > [55,] 0.7611968
> > [56,] 0.7642511
> > [57,] 0.7637415
> > [58,] 0.7588504
> > [59,] 0.7482636
> > [60,] 0.7297788
> > [61,] 0.6994875
> > [62,] 0.6498159
> > [63,] 0.5635906
> > [64,] 0.6975913
> > [65,] 0.7098972
> > [66,] 0.7174446
> > [67,] 0.7196221
> > [68,] 0.7153381
> > [69,] 0.7026455
> > [70,] 0.6779572
> > [71,] 0.6341555
> > [72,] 0.5547793
> > [73,] 0.6325678
> > [74,] 0.6551296
> > [75,] 0.6715521
> > [76,] 0.6814181
> > [77,] 0.6838614
> > [78,] 0.6771931
> > [79,] 0.6581383
> > [80,] 0.6199984
> > [81,] 0.5469392
> > [82,] 0.5677232
> > [83,] 0.6008650
> > [84,] 0.6265229
> > [85,] 0.6443861
> > [86,] 0.6537698
> > [87,] 0.6532207
> > [88,] 0.6397566
> > [89,] 0.6070646
> > [90,] 0.5398727
> > [91,] 0.5044222
> > [92,] 0.5478565
> > [93,] 0.5827146
> > [94,] 0.6086282
> > [95,] 0.6250023
> > [96,] 0.6305684
> > [97,] 0.6226043
> > [98,] 0.5951486
> > [99,] 0.5334377
> > [100,] 0.4437834
> > [101,] 0.4967086
> > [102,] 0.5404019
> > [103,] 0.5742126
> > [104,] 0.5975006
> > [105,] 0.6091056
> > [106,] 0.6065193
> > [107,] 0.5840942
> > [108,] 0.5275280
> > [109,] 0.3866770
> > [110,] 0.4478912
> > [111,] 0.4997913
> >> length(R)
> > [1] 111
> >
> > Anan Halabi
> > Reliability Eng, R&D
> > HP Scitex
> > Tel: 972-9-8924648
> > mobil: 972-52-6624231
> >
> >
> > 	[[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > and provide commented, minimal, self-contained, reproducible code.
>
> David Winsemius, MD
> West Hartford, CT
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help