Displaying 7 results from an estimated 7 matches for "fyy".
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fyi
2006 May 01
4
efficiency in merging two data frames
...a short program for
this, but it runs very slow. 15+ minutes. Is there
quick way to do it. Here is my original codes.
id$fy=rep(0,length(id$PERMNO))
for (i in 1:length(id$PERMNO))
id$fy[[i]]<-account$FYR[id$GVKEY[[i]]==account$GVKEY][[1]]
return$GVKEY=rep(0,length(return$PERMNO))
return$fyy=rep(0,length(return$PERMNO))
return$fyq=rep(0,length(return$PERMNO))
for (i in i:length(return$PERMNO)) {
temp<-id$PERMNO==return$PERMNO[[i]];
tempmon<-id$fy[temp][[1]];
if (return$month[[i]]<-tempmon) {
return$fyy[[i]]<-return$year[[i]];
return$fyq[[i]]<-4-(tempmon-ret...
2017 Mar 19
2
outer not applying a constant function
...ns to be constant it fails.
So e.g this works:
library(Deriv)
f <- function(x,y) (x-1.5)*(y-1)*(x-1.8)+(y-1.9)^2*(x-1.1)^3
fx <- Deriv(f,"x")
fy <- Deriv(f,"y")
fxy <- Deriv(Deriv(f,"y"),"x")
fxx <- Deriv(Deriv(f,"x"),"x")
fyy <- Deriv(Deriv(f,"y"),"y")
fg <- outer(xg,yg,f)
fxg <- outer(xg,yg,fx)
fyg <- outer(xg,yg,fy)
fxyg <- outer(xg,yg,fxy)
fxxg <- outer(xg,yg,fxx)
fyyg <- outer(xg,yg,fyy)
And with
f <- function(x,y) x+y
it stops working. Of course I can manually fix...
2017 Mar 20
1
outer not applying a constant function
...- function(x,y) (x-1.5)*(y-1)*(x-1.8)+(y-1.9)^2*(x-1.1)^3
> > fx <- Deriv(f,"x")
> > fy <- Deriv(f,"y")
> > fxy <- Deriv(Deriv(f,"y"),"x")
> > fxx <- Deriv(Deriv(f,"x"),"x")
> > fyy <- Deriv(Deriv(f,"y"),"y")
>
> > fg <- outer(xg,yg,f)
> > fxg <- outer(xg,yg,fx)
> > fyg <- outer(xg,yg,fy)
> > fxyg <- outer(xg,yg,fxy)
> > fxxg <- outer(xg,yg,fxx)
> > fyyg <- outer(xg,yg,f...
2017 Mar 20
0
outer not applying a constant function
...ry(Deriv)
> f <- function(x,y) (x-1.5)*(y-1)*(x-1.8)+(y-1.9)^2*(x-1.1)^3
> fx <- Deriv(f,"x")
> fy <- Deriv(f,"y")
> fxy <- Deriv(Deriv(f,"y"),"x")
> fxx <- Deriv(Deriv(f,"x"),"x")
> fyy <- Deriv(Deriv(f,"y"),"y")
> fg <- outer(xg,yg,f)
> fxg <- outer(xg,yg,fx)
> fyg <- outer(xg,yg,fy)
> fxyg <- outer(xg,yg,fxy)
> fxxg <- outer(xg,yg,fxx)
> fyyg <- outer(xg,yg,fyy)
> And with
> f...
2008 Mar 25
3
derivatives in R
Hi, I posted this message earlier in "Rmetrics" and I don't know whether I
posted in the wrong place, so I'm posting it again in Rhelp.
I have a function in x and y and let's call it f(x,y). I need to get the
Hessian matrix. i.e I need (d^2f/dx^2), (d^2f/dxdy), (d^2f/dydx),
(d^2f/dy^2).I can get these using the D function. now I need to evaluste the
hessian matrix for
1998 Jun 04
1
Funny caching problem
...)\^(CL1`0:0"``$```````!``$``0>0!@`(````Y`0```````#H``$(@`<`
M&````$E032Y-:6-R;W-O9G0@36%I;"Y.;W1E`#$(`06``P`.````S@<&``0`
M$@`[`#<`!`!G`0$@@`,`#@```,X'!@`$`!(`.P`W``0`9P$!"8`!`"$```!&
M,S0T0T8W1D%#1D)$,3$Q.$(Y-S`P-C`Y-S@R-T0U0@!&!P$$@`$`%@```$9U
M;FYY(&-A8VAI;F<@<')O8FQE;0`."`$-@`0``@````(``@`!`Y`&`/@&```@
M`````P`F```````#`#8```````(!"1`!````/`,``#@#```-!0``3%I&=;B:
M^:H#``H`<F-P9S$R-?XR`/\"!@*D`^0%ZP*#`%`3`U0"`&-H"L!S973^,@8`
M!L,"@PY0`]4'$P*`_GT*@`C/"=D"@`J!#G$+8.1N9...
2008 Aug 09
2
xy plot in version 2.7.1 for Mac (PR#12520)
...EWdSAdNf5q+b3xNhWhxndoB51i
2+zPUQi9RGH5A7qNdopWhRlLjH9iBD66HWNQaBYdZYM8iNY76X2WwdaKWrTyhKEbh2CVQ63URTtp
H5vCpnOfZYExyzhKaehjDVrdQX20BylOP6cTzGm5YPzIuECZVEgzMZ8BepUNiqGL64eq4DcLvDSe
ylCygv6HfkmvMT/7BV9hcVpKLCHLN403aDRNonkY7ZOo+Sf2KV+HdJc4rNQbNZQMvzwkvU0v0bss
ixWzRnYdH89X8EfFbYjLQtSdRItpKfz9CFo/yYJsD3fyY+IJ5Snlc3Xs0GkjGSsSoO/RD+gXzIWZ
aqyHfZsdZ3/ktXwh/x4/Ix5Wfqq8bm3HrG+g5fQgPUWfslQ2lc1m32BdbC3byB5iO9hR9hr7gFfz
Zn4TPy+6xK3i50oN0lylR7nbcq9lk/rBUMvQoaHfDH1qlCAmZyMe1mP036FHMbO9dIz+gHSKzjAL
S2LJSBrzsXnsW0jr2IPsh2w3+ykbQC+vsTPsQ/Y39jH7nBOSyrO5j+ch+flt/Hb+MP8+P4b0Gv8L
/0ykizwRFFNEhYiIFRjVRrEV6TnxrpKlHFMM+...