Displaying 20 results from an estimated 2000 matches similar to: "overlap contour"
2009 Jan 06
3
smoothed contour lines
Hi all,
I'm trying to draw a contour plot
with rounded (smoothed) contour lines instead of sharp angles;
when the grid consists of only a few points
in x- and y- axis, the resulting contour
is in facts rather ugly since very sharp angles may appear.
I did not find any way to do it,
by using either "contour" or "contourplot" (from the lattice package),
I wonder if there
2011 May 23
3
Get contour of a map
Hello everybody,
I search a function which returns the contour of map with levels like contourLines, but I would like this function return the border of the map too, because the function contourLines cannot consider the corner of the map and it is not adapted to fill polygon after that.
Thanks in advance
Pierre Bruyer
2006 Feb 10
1
the proper way to use panel functions in lattice package?
Hi,
I was trying to stack a topographic map readed in from esri shapefile with a
contour map and a vector map. However, the plotMap(maptools) and
contourplot(lattice) do not seem to work well on top of each other. Here is
part of my code.
xrange<-range(225000:350000)
yrange<-range(2685000:2810000)
basemap <- read.shape("Twn25_town_dxf_Polygon.shp")
2007 Jul 24
3
Overlaying a single contour from a new data array in levelplot
Dear R-Help community,
I am trying to overlay a single contour line over a correlation plot using
levelplot in the lattice package. These are the two arrays:
1) a correlation plot over Africa - so each grid square is a different colour
dependent on correlation - this is in an array: result_cor with dim[465,465]
2) a single contour line from a ***different data source*** - this is from data
2003 Jul 27
1
contourplot:how to get it to label all contours like 'contour'
Hi,
one of the nice things about contour is that it labels all contour lines.
contourplot only labels each particular elevation a single time.
i.e., if there are two contour lines corresponding to z = 45, it will only
label one of them.
is there a way to get contourplot to automatically label all the contour lines,
even those that are repeated?
i ask because i want to plot contour plots *w/
2013 Feb 14
1
Clip a contour with shapefile while using contourplot
Hi, I have done the interpolation for my data and I was able to create the
contours in multipanel with the help of Pascal. Now, I want to clip the
contour with the shapefile. I want only the portion of contour to be
displayed which falls inside the boundary of the shapefile.
The data mydata.csv can be found on
https://www.dropbox.com/s/khi7nv0160hi68p/mydata.csv
The data for shapefile can be
2009 Mar 15
1
Contour plots of four two-dimensional matrices
I have four large two-dimensional matrices of which I want to create contour
plots. Something like
filled.contour(<matrix>)
contourplot(<matrix>)
works but only gives me one plot at a time. If I combine the four matrices
into one three-dimensional matrix, which I'll name "seven", there should be
a way of doing something like this
contourplot(seven[,,k] for k in 1 to 4)
2009 Aug 19
1
Lattice: Drawing a single contour line with a negative value fails
Hi everybody,
I want to add a single contourline to a levelplot. While everything
works fine if the value at which the line should be drawn is positive,
there is an error if the value is negative:
library(lattice)
my.panel <- function(..., at, contour=FALSE, labels=NULL) {
panel.levelplot(..., at=at, contour=contour, labels=labels)
panel.contourplot(..., contour=TRUE,
2009 Apr 08
1
vectors on top of contours, and lattice
OK, I needed to plot a set of vectors on top of a contour plot. I
figured out a way to do this. I create a panel function that calls
"larrows()" with arguments constructed from my vector data. Then, when
I go to do the contour plot, I call contourplot() with the "panel"
argument set to point to my newly created panel function.
So far, so good.
Now, I need to do a
2010 Jun 22
1
contour plots
Hi All,
I'm having difficulty making a contour plot a would like some help.
A standard contourplot can be made by having an x,y, and some matrix (shape
x*y) with contents:
x = 1:10
y = 1:10
cont <- matrix(runif(100,min=1,max=2),nrow=10,ncol=10)
filled.contour(x,y,cont)
Looks very nice.
Sometimes data comes in a different format however. Basically an x and an y,
and a vector z with all
2004 Aug 06
1
: (Lattice): Overlaying more than one trend surface using contourplot() and wireframe()
Hi,
Is there a way to plot more than one trend surface using the functions
contourplot() and wireframe(). I have found an add=T in contour(), but
no equivalent argument in contourplot() and wireframe()?
I have taken the example 11-2 (pages 441-451) from Design and analysis
of experiments (Montgomery 2001, 5th edition) to see if this could be
done in R. I have managed to plot individual
2009 Nov 19
2
plot filled.contour over continent map
Dear all,
As a newbie in R I would like to do the following (simple?) thing:
to plot a filled.contour plot over a map showing country boundaries (e.g. for Europe)
What i do is:
map('worldHires',xlim=c(-10,40),ylim=c(35,70),boundary = TRUE,border=0.1)
map.axes()
filled.contour(mslp, zlim=c(1000,1020),color.palette = colorRampPalette(c("blue", "white",
2009 Oct 22
1
contour() & contourLines()
Hi Folks,
I have been using contour() to produce some contour plots
(of a spatially-smooted density produced by kde2d()), with
very satisfactory results.
I now want access to the coordinates of the points on the
contours, and it would seem that contour() does not return a
value, so there is nothing from which these could be extracted.
However, apparently contourLines() does, and it seems to be
2005 Feb 08
2
Fw: Contour plot
I understand that I need to have a (in this case) square matrix with all the
data. But the question now is;
- can the contourplot not interpolate the missing values
or alternatively
- I have fit a model to the z data (z = 100 + 0.5x + 0.5y). How can I make
from this model a "square" matrix z to make a contour plot?
Kind regards, Darius Blaszijk
----- Original Message -----
From:
2010 Sep 27
1
smooth contour lines
Is there an easy way to control smoothness of the contour lines?
In the plot I am working on due to the undersampling the contour
lines I am getting are jugged, but it is clear "by eye" these should
be basically straight lines.
In maps package I found smooth.map function, but maybe there is a more
generic way
of accomplishing the same thing.
Ideally there would be an option to control
2002 May 31
1
Re: FW: Contour v Contourplot
Phil,
You write:
>> Using x,y, and z variables in the enclosed test.RData, the command
>>
>> contour(x,y,z)
>>
>> produces a lovely 2D plot, whereas
>>
>> contourplot(z~x*y)
>>
>> produces the error..
>>
>> Error in if (lim[1] > lim[2]) stop("Improper value of limit") :
>> missing value where
2008 Dec 03
1
how do I eliminate excess levels in lattice contourplot key / legend?
I'm working on a contourplot( ) graph, the subject of several previous
posts to this list. The contours express probabilities from 0 - 1, but the
key that is automatically generated by contourplot pads the probability
scale with values that are impossible (i.e, range goes from -0.2 to 1.2),
which will be confusing to those who view the plot. How can I get the
scale to just run from 0 - 1?
2006 May 11
1
Conditional contour plots for estimated density functions using Lattice
Does anybody here have a suggestion for a clever way of creating contour
plots for estimated bivariate density functions conditional on a factor?
The contourplot function in the 'lattice' package only accepts data that
are on the form 'z ~ x * y', not on the form 'x,y' or 'y~x'; otherwise I
could probably have used the panel function to do the needed conversion.
2004 Jun 07
1
contour lines on levelplot?
With "image" and "contour", one can get both colors and lines to
enhance the image of a contour plot. What's the best way to do this
with Lattice graphics? The following is one ugly hack, producing the
desired result after much trial and error (R 1.9.1 alpha under Windows
2000):
# setup
DF <- expand.grid(x=1:3, y=1:3)
DF$z <- (DF$x+DF$y)
# Traditional
2005 Feb 09
2
[Fwd: Re: Fw: Contour plot]
Petr,
It works perfectly! But I still have a question;
I have fit the following data;
x,y,z
1,10,11
2,11,15
3,12,21
4,13,29
5,14,39
6,15,51
7,16,65
8,17,81
9,18,99
10,19,119
>dat.lm <- lm(z~I(x^2)+y, data=dat)
>dat.lm
Call:
lm(formula = z ~ I(x^2) + y, data = dat)
Coefficients:
(Intercept) I(x^2) y
1.841e-14 1.000e+00 1.000e+00
How do I create the