[R] NATURAL Smoothing B-splines

[Spencer Graves]

 > library(sos)
 > ns. <- findFn('natural spline')
found 191 matches;  retrieving 10 pages
2 3 4 5 6 7 8 9 10
Downloaded 113 links in 70 packages.
 > ns2 <- findFn('natural splines')
found 145 matches;  retrieving 8 pages
2 3 4 5 6 7 8
Downloaded 70 links in 42 packages.
 > ns2. <- ns.|ns2
 > ns2.

# This displayed a table of 137 different help pages sorted to place the 
package with the most matches first.

 > findFn2xls(ns2.) # writes a file with a name like "nls2..xls" to the 
working directory [getwd()]
# with a sheet giving a summary by package.


       Hope this helps.
       Spencer


On 8/2/2015 10:10 AM, Marc Lamblin wrote:
> Hi all,
>
> I'm an engineering student from Politecnico di Milano.
> I want to perform Smoothing using Smoothing B-splines on syntethic
> data. The splines must be NATURAL (at the edges the second and third
> order derivates are zero).
> How can I impose this constraint?
> I have searched in R documentation. For Smoothing I use the fda
> package. From the description of the function smooth.basis() it seems
> that it is not possible to use natural B-splines. I have found only
> the function ns() from splines package but in this way you can obtain
> only the basis and I have seen that this function is used in models
> expressed in symbolic notation.
>
> Thanks in advance!!
>
> mggl
>
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