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Date: Tue, 29 Apr 2008 16:22:53 +0100

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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. Received on Tue 29 Apr 2008 - 17:05:11 GMT

Date: Tue, 29 Apr 2008 16:22:53 +0100

Readers,

I am having difficulty understanding how to enter commands into r.

I have data arranged as:

100, 200, 300 5.6, 6.7, 7.8 8.9, 9.0, 0.1 1.2, 2.3, 3.4

The data is saved in csv format and I use the command 'read.table' to import into r.

The values 5.6...3.4 are a function of values 100,...300, i.e. 100,...300 are independent variables (x). The function is a power series:

y=a+bx+cx^2

How do I obtain the values of a,b,c by minimisation of the sum of squares of deviations?

So far looking at the documentation 'r-intro' section 10, I tried the following:

functionname<-function(a,b,c){

*+ a<-sum(a)
**+ b<-sum(b)
**+ c<-sum(c)
**+ y<-(a+bx+cx^2)
*

+ x<-(x)

*+ }
*

The documentation states: "...using a call such as...". What does this mean?

Yours,

rhelp_at_conference.jabber.org

gnu/linux mandriva 2008

r 251 (27-06-07)

R-help_at_r-project.org mailing list

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. Received on Tue 29 Apr 2008 - 17:05:11 GMT

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