similar to: Recovering x/y coordinates from a scatterplot image

Hello all, has someone please a few hints about how to 1.st: draw an image (preferrably a jpg) and then 2nd: plot() on that image I am using a mac - and after searching and trying different ways (I have installed EBImage) I now would like to ask for help... Thanks! Johann

I want to create a plot of positions (x(t),y(t)) of animals in a barn for t=1,2,... (I have in mind creating many of these, saving them as png's and combining them into a small movie). I have an image file showing the physical layout of the barn, and I would like to have that image as background for the plots. Can that be done in R (easily) or is that something I should do outside of R using

Hello I am new to R and I cannot overcome the 2 problems 1.Defining my own color scale for a value on a scatterplot 2.Adding legend showing values for colours I have a set of points in area of my research with coordinates X and Y and a value which I would like to show with colors. #values for points are residuals from regression stepmod = step(wmodzad, direction="both") #I am

Dear R Users, I'm able to display a legend using the following code: > legend("topright", c("Simulation", "Observation"), fill=2:3, bty="n") However, this causes the legend to be positioned too close to the bars in my barplot. I'd like to move the legend up slightly. I have been trying to determine the necessary values by trial and error to do

I would like to use a map or aerial photo as a background to plotting solid lines and text, and semi-transparent color contours, in base and lattice graphics. Plot coordinates need to be consistent with the georeferenced background. For example, a color contour plot would have an gray-toned aerial photograph as a background for overprinted semi-transparent color contours of some spatially

Hi, everyone! I''ve encountered a problem with form_remote_tag not passing all the parameters a "normal" form would pass. When the submit tag is an image (image_submit_tag), the form usually submits the x and y coordinates where the click was made, but form_remote_tag ommits them. I guess it''s because the it?s using JavaScript to serialize the form elements. Has

I'm having trouble with alignment of a trend line overlayed onto an image plot. The two should be plotted on the same x-axis (time-series). However, the trend line begins about an inch into the image plot x-axis and ends about an inch off of end of the image plot. Once I have the alignment sorted, I need to put a secondary y-axis on the image plot which is scaled for the trend line. An

Hi Folks, I'm contemplating using locator() to digitise external graphics. To set context, I would be using X11 display on Linux. To pre-empt the obvious comment: I've found on the R site the suggestion to use the 'pixmap' package. I've tried this, and it works; but it involves building a big R object (the internal pixmap representation), and this chokes my somewhat puny

Hi R, Wanted to check if there are any packages available for getting the (x,y) data points of a graph or a plot, which is in the image format. Say, the plot could be a published report, and I want to get the points of the curve plotted. (I am speaking something related the subject discussed in http://www.uniphiz.com/digitizing.htm) Thanks, Shubha This e-mail may contain

Dear R users, I'm interested in a combination of a scatterplot and an image graph. I have two large vectors. Because in the scatterplot some areas are sparsely and others densely populated, I want to see the points, and I also want their color to be changed based on their density (similar to a heat map). Is there a function that can do that? Thank you, b.

Anyone who can help me with the following question? How can I add weight to [x,y] coordinates on a graph/scatterplot? Background: Monte Carlo simulation generated 730,000 [x,y] coordinates with a weight attached (from 0-0.5). Both x and y are rounded and fit on a raster with x-axis 0-170 months (smalles unit = 1 month) and y-axis 0-6 (smallest unit=0.1). I would like every [x,y] to add its

Hello all, I'm trying to graph a scatterplot of a large (5,000 x,y coordinates) of data with the caveat that many of the data points overlap with each other (share the same x AND y coordinates). In using the usual "plot" command, > plot(education, xlab="etc", ylab="etc") it seems that the overlap of points is not shown in the graph. Namely, there are

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Short form: How do I transform the output of grid.locator() (or grid.locator(unit='npc')) to the native (or npc) coordinates of a viewport other than the top-level viewport? Thanks in advance. -Ben Long form: I would like the user to be able to click anywhere on the R graphics window. I would then like to figure out which leaf viewport the user clicked in and compute the native

Hello R people Is there a way to get the coordinates of the text region (coordinates of the four corners for example) when using the text function? I'm looking for a way that does not make use of interactive function like locator. My goal is to determine the position of other structures in a graphic so that they don't overlap with the text. Thanks Francois Rousseu

Dear R-list, I have a plot with y-axis corresponding to wind measurments and x-axis with date-time information. When I want to identify some extrem wind events in the wind-curve, I use locator() to get the exact date-information, by clicking in the points in graph I?m interested in. I get in the R console the x and y coordinates. The x coordinates are not in a POSIXct format, I guess R is

All, When using grid.text it seems my supplied (x,y) coordinates are being plotted only in npc (normalized parent coordinates) where (.5,.5) is the center of the graph. How do I allow (x,y) to be coordinates corresponding to the (x,y) values in the graph? The examples in ?grid.text seem to do this. (I think the problem lies in how x and y are defined with respect to unit ). Any help much

Dear R-users, I need some help concerning the plotting of dendrograms for hierarchical agglomerative clustering. The agglomeration niveau of each step should be displayed at the branches of the dendrogram. For this I need the x/y coordinates of the branch-agglomerations of the dendrogram. The y-values are known (the heights of the agglomeration), but how can I get the x-values? > mydata

Hello everyone, This is just a quick double check. It concerns the 'scatterplot function' in R. I have 6 curves and I wish to represent each of them by a different kind of line (their colour must be black). The curves are derived from the cuminc function...the coordinates of which are in 'xx'. Upon reading the documentation in R, it looks like I can use the 'on/off'

Hi There, I'm attempting to plot 10 values on a three-dimensional PCA with text labels next to each point. While i have no trouble doing this on 2D plots using the 'text' or 'textxy' function, I cannot find a function to do this on a 3D plot. I am using princomp for my PCA: >PCA<-princomp(eucdata, cor=TRUE) >PCA$scores [,1:3] # the three principal components i