Displaying 2 results from an estimated 2 matches for "columnd".
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2011 Jun 15
2
Escape sequence in eval ()
Hello,
I am wondering how to get the quotation marks into a variable expression. I
can't escape it with the backslash \ ...
Example:
I can access my data frame via
TABLE$"2011-01-02"$columnD
Now I want to do this automatically.. (with a for loop)..
a <- TABLE
b <- " \"2011-01-02\" "
c <- "columnD"
acessmytable <- paste(a,b,c, sep="$")
parse(text="accessmytable")
eval(accessmytable)
It will return
[...
2004 Dec 09
3
surf.ls
Hello,
I am looking into description of surf.ls(spatial)
and see under value $beta - the coefficients.
When I use polynomial of degree 2 to fit surface
I expect to get 4 coefficients:
z = a_1 x^2 + a_2 xy + a_3 y^2 + a_4
What do beta really stand for and why do I get
$beta vector of length 6?
Thakns,
Mark