Ted Dunning a écrit :
> On Sat, Feb 28, 2009 at 6:52 AM, Phil Steitz wrote:
>
>> What is going on here is that the special case - linear regression analysis
>> - is being discussed as an example of an optimization problem.
>>
>
> Yes. It is a special case.
>
> But it was germane to the topic,
On Sat, Feb 28, 2009 at 6:52 AM, Phil Steitz wrote:
> What is going on here is that the special case - linear regression analysis
> - is being discussed as an example of an optimization problem.
>
Yes. It is a special case.
But it was germane to the topic, particularly the imposition of a part
Luc Maisonobe wrote:
I'm afraid what I propose is far more basic than what you need. I hardly
understand the concepts you use in your message (I'm not a statistician
at all, I work in space flight dynamics). I assume we use the same words
with slightly different meanings in mind (models, residual
I'm afraid what I propose is far more basic than what you need. I hardly
understand the concepts you use in your message (I'm not a statistician
at all, I work in space flight dynamics). I assume we use the same words
with slightly different meanings in mind (models, residuals,
observations, variab
Here is what I would do in R to do a linear model with observations
consisting of input variables x1 ... x3 and target variable y:
m <- lm(y ~ x1 + x2 + x3, data)
The first argument lets me supply the form of the regression. I could have
regressed on log(x3), for instance, or used x1*x2 + x
Ted Dunning a écrit :
> Hmmm...
>
> I may have misunderstood our conversation (and therefore probably sounded a
> bit incoherent), but I was talking about weights on observations which may
> or may not be what you are talking about here.
This is exactly what I am talking about.
>
> Also, if you
Hmmm...
I may have misunderstood our conversation (and therefore probably sounded a
bit incoherent), but I was talking about weights on observations which may
or may not be what you are talking about here.
Also, if you *are* talking about the same thing and the vector is a vector
of residuals suc
I have just checked in the first changes as discussed on the list.
The changes are merely code moved from one package to another. The new
packages are optimization.direct, optimization.general,
optimization.linear (empty for now) and optimization.univariate. The
removed packages are analysis.minim
