Displaying 10 results from an estimated 10 matches for "geom_contour".

2017 Oct 09

1

example of geom_contour() with function argument

...d paste the wrong snippet earlier and made a typo
in doing so, but the result is the same with the more appropriate snippet.
require(mvtnorm)
require(ggplot2)
set.seed(1234)
xx <- data.frame(rmvt(100, df = c(13, 13)))
v <- ggplot(data = xx, aes(x = X1, y = X2, z = dmvt, df = c(13,13)))
v + geom_contour()
Don't know how to automatically pick scale for object of type function.
Defaulting to continuous.
Error: Aesthetics must be either length 1 or the same as the data (100): x,
y, z, df
I do not understand how to put in a function as an argument to
geom_contour() and the examples in the help f...

2017 Oct 09

1

example of geom_contour() with function argument

Hi BFD,
?geom_contour() *does* have helpful examples. Your Google-foo is weak:
Searching for geom_contour brought me:
http://ggplot2.tidyverse.org/reference/geom_contour.html as the first
result.
HTH
Ulrik
On Mon, 9 Oct 2017 at 08:04 Big Floppy Dog <bigfloppydog at gmail.com> wrote:
> Can som...

2017 Oct 09

2

example of geom_contour() with function argument

...compute density as a function of the grid of points
xx2$d <- dmvt( as.matrix( xx2[,1:2] ) ) # feels weird not specifying
measures of centrality or spread
ggplot( data = xx
, aes( x = X1
, y = X2
)
) +
geom_point() + # might want this line after the geom_contour
geom_contour( data = xx2 # may want to consider geom_tile as well
, mapping = aes( x = X1
, y = X2
, z = d
)
)
#' ![](https://i.imgur.com/8ExFYtI.pn...

2017 Oct 09

1

example of geom_contour() with function argument

...ng from the dataset in the
example). Can you please point to the specific example that might help?
Here is what I get:
require(mvtnorm)
require(ggplot2)
set.seed(1234)
xx <- data.frame(rmvt(100, df = c(13, 13)))
v <- ggplot(faithfuld, aes(waiting, eruptions, z = drmvt, df = c(13,13)))
v + geom_contour()
Don't know how to automatically pick scale for object of type function.
Defaulting to continuous.
Error: Aesthetics must be either length 1 or the same as the data (5625):
x, y, z, df
Can you please tell me how to use this here? Or is some other example more
appropriate?
TIA,
BFD
On Mo...

2017 Oct 09

1

example of geom_contour() with function argument

...nt to the specific example that might help?
>
> Here is what I get:
>
> require(mvtnorm)
> require(ggplot2)
> set.seed(1234)
> xx <- data.frame(rmvt(100, df = c(13, 13)))
>
>
> v <- ggplot(faithfuld, aes(waiting, eruptions, z = drmvt, df = c(13,13)))
> v + geom_contour()
>
> Don't know how to automatically pick scale for object of type function.
> Defaulting to continuous.
> Error: Aesthetics must be either length 1 or the same as the data (5625):
> x, y, z, df
>
That's not what I get:
> v <- ggplot(faithfuld, aes(waiting, erup...

2017 Oct 09

1

example of geom_contour() with function argument

Can someone please point me to an example with geom_contour() that uses a
function? The help does not have an example of a function, and also I did
not find anything from online searches.
TIA,
BFD
-----------------------------------------------------------------------------------------------
How about geom_contour()?
Am So., 8. Okt. 2017, 20:52 schrie...

2017 Jun 18

2

R_using non linear regression with constraints

..., lower = c( 1000, 0 )
, upper = c( 3000, 1 )
)
a <- as.vector( coef( myfit )[ "a" ] )
b <- as.vector( coef( myfit )[ "b" ] )
brks <- c( 500, 1e7, 2e7, 3e7, 4e7 )
ggplot( objdtass, aes( x=a, y=b, z = x, fill=x ) ) +
geom_tile() +
geom_contour( breaks= brks ) +
geom_point( x=a, y=b, colour="red" ) +
geom_point( x=objdtassmin$a
, y=objdtassmin$b
, colour="green" ) +
scale_fill_continuous( name="SumSq", breaks = brks )
# Green point is brute-force solution
# Red poi...

2017 Jun 18

1

R_using non linear regression with constraints

...upper = c( 3000, 1 )
> )
> a <- as.vector( coef( myfit )[ "a" ] )
> b <- as.vector( coef( myfit )[ "b" ] )
>
> brks <- c( 500, 1e7, 2e7, 3e7, 4e7 )
> ggplot( objdtass, aes( x=a, y=b, z = x, fill=x ) ) +
> geom_tile() +
> geom_contour( breaks= brks ) +
> geom_point( x=a, y=b, colour="red" ) +
> geom_point( x=objdtassmin$a
> , y=objdtassmin$b
> , colour="green" ) +
> scale_fill_continuous( name="SumSq", breaks = brks )
> # Green point is...

2017 Oct 08

1

how to overlay 2d pdf atop scatter plot using ggplot2

Hi,
I am no expert on ggplot2 and I do not know the answer to your question. I looked around a bit but could not find an answer right away. But one possibility could be, if a direct approach is not possible, to draw ellipses corresponding to the confidence regions of the multivariate t density and use geom_polygon to draw this successively?
I will wait for a couple of days to see if there is a

2017 Jun 18

2

R_using non linear regression with constraints

I ran the following script. I satisfied the constraint by
making a*b a single parameter, which isn't always possible.
I also ran nlxb() from nlsr package, and this gives singular
values of the Jacobian. In the unconstrained case, the svs are
pretty awful, and I wouldn't trust the results as a model, though
the minimum is probably OK. The constrained result has a much
larger sum of squares.