[R] Compute Regressions with R-Function

[Bert Gunter]

No function is necessary for multiple lhs's. lm() allows a matrix as
it's lhs and will fit a separate regression for each column of the
matrix. Please read ?lm carefully for details. For that matter, please
read the linked Help pages and/or spend some time with a tutorial
(there are many on the web) to learn proper linear models syntax.
There are subtleties involved (formulas have environments, use of ".",
use of I(), etc.) that require some effort to learn. It may help you
avoid further difficulties down the road.

Cheers,
Bert
Bert Gunter

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
   -- Clifford Stoll


On Thu, Nov 12, 2015 at 9:37 AM, Jeff Newmiller
<jdnewmil at dcn.davis.ca.us> wrote:
> Your email is severely damaged because you sent it using HTML format. Please adjust the settings in your email software to use only plain text when sending to this list so we can see what you see.
>
> While you are at it you should read about making your examples reproducible [1]... it may seem like a pain but you are likely to get better assistance if you make the extra effort before pressing the send button.
>
> (Also, RStudio is a fine way to use R, but many people here use the R interpreter just fine without it so ask all you like about R here but don't assume we are all looking at the same screen you are. If you find you need to refer to RStudio to ask your question then you may be going off-topic. Your current question seems on topic though.)
>
> I don't see a problem with your approach such as I can guess where you are going with it, but your code is messed up and your error does not look like it goes with that code so I have no idea where your actual problem is.
>
> [1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
> ---------------------------------------------------------------------------
> Jeff Newmiller                        The     .....       .....  Go Live...
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> Sent from my phone. Please excuse my brevity.
>
> On November 12, 2015 8:27:58 AM PST, Matthias Worni <wornimatthias at gmail.com> wrote:
>>Hello
>>
>>I was trying to set up a function() that allows easely to calculate
>>regressions for severel dependent variables with the same independent
>>variables.
>>
>>My function looked like this but was turned down by an error (Im quiet
>>new
>>to R Studio). So here is my solution:
>>
>>b
>>CO2
>>logTrop_Aerosol
>>lm(b ~ CO2  + logTrop_Aerosol  )
>>
>>Trend <- function(x,CO2,logTrop_Aerosol) { lm x   CO2  +
>>logTrop_Aerosol}
>>
>>b is a vector containing 400 values of heat content
>>CO2 also contains 400 values as well as logTropAerosol
>>
>>my idea would be that I simply can replace x (heat content) by other
>>vectors containing heat content.
>>
>>The error I got was the following:
>>
>>Error: unexpected symbol in "Trend <- function(x,y,z) { lm x"
>>
>>Thanks a lot for the help!
>>
>>Best Matthias
>>
>>       [[alternative HTML version deleted]]
>>
>>______________________________________________
>>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>>https://stat.ethz.ch/mailman/listinfo/r-help
>>PLEASE do read the posting guide
>>http://www.R-project.org/posting-guide.html
>>and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.