Deducer Google Group

Re: Help problem with rJava

harold...@gmail.com (Harold Velasquez Barona) — Tue, 21 May 2013 04:25:54 UT

Mr. Rissler.

Now I'm working with the 32 bit version, but now I have other problems,
that can happen?.

Thanks a lot for your help

Re: Creating a Package

ifell...@gmail.com (Ian Fellows) — Mon, 20 May 2013 17:35:11 UT

.onLoad is a hook that gets called when your package is loaded via
library(packageName). Take a look at the manual for writing R extensions
[link]. There are also
a number of package tutorials out there: e.g.
[link]

Creating a Package

dorick...@gmail.com — Sun, 19 May 2013 12:15:29 UT

Hi I am still new with deducer, and i have a few problem.
i run a few code and it works! so now i want to make it a package
how should i do it?
in [link],
"Wrapping into package"
i was told to run an .onload function but it doesn't work
is there any solution for this?

Re: Help problem with rJava

discn...@gmail.com (Matt Rissler) — Fri, 17 May 2013 16:33:31 UT

Make sure your version (32 vs 64-bit)of Java matches the version of R you
are using. I don't remember what I did to fix it, but I'm pretty sure this
is what is came down to.
[link] has both 32-bit and 64-bit versions.
They can coexist side-by-side, so I think I just installed the 64-bit

Re: Help problem with rJava

kenny.d...@gmail.com (Ken Deal) — Thu, 16 May 2013 01:29:16 UT

I'm having the same issue. I've installed Deducer successfully previously
but on a new laptop with W8, I've installed Java several times, have tried
to install JGR and while the JGR desktop icon appears, nothing happens when
I click on it. Any help would be greatly appreciated. Thanks, Ken

On Tue, May 14, 2013 at 11:32 PM, Harold Velasquez Barona <

Re: Help problem with rJava

ifell...@gmail.com (Ian Fellows) — Wed, 15 May 2013 04:49:25 UT

install java on your computer and restart. If it is already installed
re-install it.

ian

On Tue, May 14, 2013 at 9:32 PM, Harold Velasquez Barona <

Help problem with rJava

harold...@gmail.com (Harold Velasquez Barona) — Wed, 15 May 2013 04:32:01 UT

Hii
I tried to install Deducer as shown on the website and it generates the
message in the attach. Anybody knows can happen?
Tks for your answers!!!

Re: Nonlinear curve fit with Deducer

tomhop...@gmail.com (Tom Hopper) — Sat, 11 May 2013 07:56:15 UT

Stan,

I completely agree with your points. The steep learning curve is R's
biggest weakness.

Still, there are several good manuals and sources of help for R. Though I'm
not in the position of teaching statistics or R (not a profession, anyway)
I think that "An Introduction to R" by Venables and Ripley, available as

Re: Nonlinear curve fit with Deducer

stan.warf...@gmail.com (Stan Warford) — Fri, 10 May 2013 22:51:30 UT

I should have seen that. (Although I do not know why x : x does not work.)
Thanks.
As a result of this investigation I am going to switch to R with Deducer
for my course and urge others in my department to do the same as well. Some
of my colleagues are reluctant to switch because of the perceived

Re: Nonlinear curve fit with Deducer

ifell...@gmail.com (Ian Fellows) — Fri, 10 May 2013 22:09:25 UT

y ~ poly(x,2) which is a drop down option. You can also type: y ~ x + I(x^2)

best,
Ian

Re: Nonlinear curve fit with Deducer

stan.warf...@gmail.com (Stan Warford) — Fri, 10 May 2013 21:49:16 UT

I bet : for multiplication bites a lot of newcomers! I thought I could get
a quadratic fit by putting in x + x : x, but that does not work for either
the curve fit or the plot. I figured out how to do the quadratic curve fit
with the poly option in the Linear Regression Model Builder, but I cannot

Re: Nonlinear curve fit with Deducer

ifell...@gmail.com (Ian Fellows) — Fri, 10 May 2013 05:35:23 UT

Stanley,

I had interpreted the "x" in your first term as multiplication, leading me
to tell you how to specify A*ln(x) + B*x + C. You are basically right with
your formula, but R interprets the "*" in x*log(x) as the interaction,
_not_ as multiplication. The correct formula is y ~ x:log(x) + x, or y ~

Re: Nonlinear curve fit with Deducer

stan.warf...@gmail.com (Stan Warford) — Thu, 09 May 2013 22:30:24 UT

Thanks for the quick response.
I chose 1(b) as it seems easier than 1(a). However, computer science theory
predicts the terms x*log(x) with coefficient A in my original post, and x
with coefficient B in my original post. So, I edited the equation to be
x*log(x), which was accepted by the dialog box, and used the plus button to

Re: Nonlinear curve fit with Deducer

ifell...@gmail.com (Ian Fellows) — Thu, 09 May 2013 18:19:27 UT

(1) there are two ways of doing it.
(a) Go into Data -> Transform and create a new variable using the log
transform (e.g. named x.tr). Then go to linear model, and add x and x.tr as
predictors of y. This will give you your model.
(b) Open linear model, with x predicting y. in the model builder

Nonlinear curve fit with Deducer

stan.warf...@gmail.com (Stan Warford) — Thu, 09 May 2013 17:54:17 UT

Hi everybody,
I am new to R and Deducer, running R 3.0.0, and want to provide a
point-and-click tool for my students to do a nonlinear curve fit of the
equation
y = A x ln(x) + B x + C
I want my students to compare the RMSE of the best fit of this equation
with the RMSE of the best fit of a quadratic equation to determine which is