ect length in:
>`==.default`(x1, a)
> > new.dat
> y1 x1 x2
>30.5977786 A B
>62.5470739 A B
>90.9128595 A B
>12 1.0953531 A D
>15 2.4984470 A D
>18 1.7289529 A D
>61 -0.4848938 D B
>6
>
>you can do bet
ist.
Any thoughts on how I can replicate the error? As far as I can tell, the
only difference between the case where I am getting errors and the example
above is that the levels of x1 in my case are words (i.e., "Smelly",
"Howdy"), but strings are strings, aren't they?
M
4.752961 3
15 4.445216 3
>
I seem to have lost everything I once has associated with "vecs", and it's
turned my actual values into arbitrary groupings.
I assume this has something to do with the behaviour of factors? Does
anyone have any suggestions on how to get my original le
"blue"),
ylim = range(ex.dat$y1)))
arrows(1:2,xbar+sem, 1:2,xbar-sem, col = c("red", "blue"), angle=90,
code=3, length=.05)
#as you can see, though the values for standard errors match the
appropriate means, the assignment of colours d
ion where I can
specify the inclusion of error bars. Presumably the interaction.plot has
figured out how to do what I'm attempting, so I have some faith that I am
on the right track
Michael Rennie
Ph.D. Candidate, University of Toronto at Mississauga
3359 Mississauga Rd. N.
Mississauga, O
tion in a tabulated form.
and no smart-alec comments about bonferonni corrections :)
Thanks,
Mike
Michael Rennie
Ph.D. Candidate
University of Toronto at Mississauga
3359 Mississauga Rd. N.
Mississauga, ON L5L 1C6
Ph: 905-828-5452 Fax: 905-828-3792
__
hat you do here. Not only are you
providing a service to people who are learning R, but indeed helping
increase "R literacy". Soon, they'll be speaking R on the subway.
Thank you all, once again. You are all wonderful people.
--
Michael Rennie
Ph.D. Candidate
University of To
Alternatively, can I manipulate the output I am currently getting for the t-
statistics so that I can isolate just the numbers?
--
Michael Rennie
Ph.D. Candidate
University of Toronto at Mississauga
3359 Mississauga Rd. N.
Mississauga ON L5L 1C6
Ph: 905-828-5452 Fax: 905-828-3792
__
my syntax is off, but does anyone have any suggestions on how to fix it?
Unfortunately, the only resources I have available to me at the moment are
an "S-plus v. 4. guide to statistics", the archived help files on the R
website, an the examples and help files in R.
Your help
found some discussions in the archives revolving around type III sums of
squares from 2001, but the lack of consensus around the discussion did little
to assure me that I should try this approach.
Anyone with advice, code or suggestions, I'd love to hear any of it.
Cheers,
Mike
--
Michael Rennie
; problem would eliminate the need to have all those variables defined in
> the global environment (but otherwise it won't change anything).
>
What's lexical scoping?
Mike
--
Michael Rennie
M.Sc. Candidate
University of Toronto at Missis
ver p, ACT, as evidenced that they offer
identical solutions for the same values of p, ACT, then shouldn't they be
reaching the same solution?
AH! Ureka moment- see top of e-mail
Thanks again for your suggestions.
Mike
>
> Reid Huntsinger
>
> -Original Message-
what they do in excel- it's something about
how R is examining the possibilities in the optimization process that is
giving me different answers between the two.
I dunno- I'm going to tinker with it some more tonight.
Mike
Reid
-Original Message-
From: Michael Rennie [mail
t;
> > .
> > fn: A function to be minimized (or maximized), with first
> > argument the vector of parameters over which minimization is
> > to take place. It should return a scalar result.
> >
> > Your fn defined as:
> > f <- 1
o
work.
Mike
Sorry I can't be more helpful.
Jerome
On July 15, 2003 10:46 am, Michael Rennie wrote:
> Hi there
>
> I thought this would be of particular interest to people using 'optim'
> functions and perhaps people involved with R development.
>
> I
4.1
318 104 4.2
319 105 4.2
320 106 4.3
321 107 4.3
322 108 4.4
323 109 4.4
324 110 4.5
325 111 4.5
326 112 4.6
327 113 4.7
328 114 4.7
329 115 4.8
330 116 4.9
331 117 5
332 118
<-c(p,ACT)
>
> #specify sttarting values
> #q0<-c(p = 1, ACT = 1)
>
> #introduce function to solve
> f <- function (q)
+ {
+
+
+ M<- length(Day) #number of days iterated
+
+ for (i in 1:M)
+ {
+
+ #Bioenergetics model
+
+ if (Day[i]==1) W[i] <- Wo else
+ if (j
that ignores its parameters.
From what I've read and the examples I've encountered, the 'optim'
function expects the first entry in
optim(x, f, etc)
To be the starting point for your variable that you specify earlier in the
loop under
f<- function (x)
If I am wron
introduce function to solve
> f <- function (q)
+ {
+
+ M<- length(Day) #number of days iterated
+
+ for (i in 1:M)
+ {
+
+ #Bioenergetics model
+
+ if (Day[i]==1) W[i] <- Wo else
+ if (jday[i]==121 && Mat==1) W[i] <- (W[i-1]-(W[i-1]*GSI*1.2)) else
+ W[i] <- (W[i-1]+(Gr[i
d "optim" is stalling in the same places and generating the same
errors as 'nlm'.
Any other thoughts or suggestions for what I'm doing wrong?
hope this helps. spencer graves
Michael Rennie wrote:
Hi there
I am having trouble figuring out how to get an nlm function to r
t length"- an error I don't get when I run the
mass-balance loop outside the nlm function and just specify q, r).
Does anyone know how to specify two parameters in the function, and ask for
estimates of both back from nlm? Alternatively, any hunches on how to make this
thing do what I want
U
[1,] 9.20 233.6647 107.5640 64.50050 43.06345 31.93755 15.840142
Also, does anyone know why I might be getting differences in the same
calculation between R and Excel? Is there any way to keep R from rounding your
numbers, or to specify the # of decimal places you want for an el
FB)*(exp(FG*p))*C)
+
+ U<- (UA*(comp[,2]^UB)*(exp(UG*p))*(C-F))
+
+ SDA<- (S*(C-F))
+
+ Gr<- (C-(ASMR+F+U+SDA))
+ #Day, Temp, Vc, Vr, W, C, ASMR, SMR, A, F, U, SDA, Gr)
+
+ bio<- rbind(c(W, C, ASMR, SMR, A, F, U, SDA, Gr))
+
+ dimnames (bio) <-list(NULL, c
("W", "C&q
MR, A, F, U, SDA, Gr))
dimnames (bio) <-list(NULL, c
("W", "C", "ASMR", "SMR", "A", "F", "U", "SDA", "Gr"))
}
bio
I would be grateful for any suggestions people might have.
Thanks,
Mike
--
Michael
d stalls in the same spot as
the previous version.
Does anyone have any hints on how to make this if else statement work to do
what I need? This is my first time trying to use these statements, and the
S-plus manual i have is proving to be terribly unhelpful.
What am I doing wrong?
Mike
Mi
d stalls in the same spot as
the previous version.
Does anyone have any hints on how to make this if else statement work to do
what I need? This is my first time trying to use these statements, and the
S-plus manual i have is proving to be terribly unhelpful.
What am I doing wrong?
Mike
Mi
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