similar to: Plotting Discriminants from qda

Dear R Help Members, I need to draw a pie chart for someone and there are 3 small slices in it identifying different species, all 0.7%, who’s labels overlap so you cannot read them. Is there a way to have only 1 label the three slices, so as to merge the three labels into one without merging the 3 slices? Alternatively, is there a way to extend the pointing lines, so that they could be different

Dear R help members, I have constructed a bar plot using ggplot, where I am showing the number of particles in 10m depth bins (from 0-150m) by release area (3 different ones) and Model (also 3 different ones). My problem is that for each release area a different number of particles was released (say 35, 45 and 56). I now need to be able to show the number of particles in each depth bin

Hi, I am relatively new to R and have a question regarding code. I have a data set which has data organised by location (site names, which are factors). I now want to add a new variable Region (this will be non numerical, as it will be names). Each region will contain locations. So for example: Region: WestCoast Locations in Region WestCoast: Tralee, Carradale and so on... So each Region will

Venables and Ripley's MASS 3ed mentions a function predplot, used for plotting results of lda and qda. But even with the library MASS loaded, R (1.4.1) tells me predplot doesn't exist, and when I search the 1.4.1 documentation for predplot, it finds nothing. Does predplot still exist somewhere, or has it been replaced by a new and improved version with a different name? Thanks.

Hi, I'm a R newbie and I have a supervised 2-class classification problem. To find out the best representation of my data (dim = 45). I want to perform LDA und QDA on the diffrent data representations to find out, which is best to discriminate the 2 sets. For LDA there exists a method plot.lda shows (in the 2 class case) a histogramm of the data, projected onto the linear discriminants (pleas

Hi, I am not sure if I remember correctly a mail last week to this messageboard where Prof Ripley said Fisher's discriminants are not used in lda within R and that Rao's are used instead, is this true? I looked in MASS (1996) but I couldn't find the reference to this in chapter 12 (multivariate analysis), the (help)lda doesn't tell me either. Could anyone tell me where can I

Hi, I have been using some of the functions in r for classification purposes, chiefly lda, qda, knn and nnet. My problem is that the only one I can figure out how to represenent graphically is lda (using plot.lda). I have tried 'fooling' this function into accepting qda input for plotting but to no avail. I wonder if you have any suggestions? Thanks alot, Anne Marie Power Marine lab.

Hi listers, Does anybody knows if the function qda for quadratic discriminant analysis provides the coefficients of quadratic discriminants... Well, I find out that for the linear discriminant analysis lda, the fonction provides the coefficients... Thanks in advance, Marcio -- View this message in context: http://www.nabble.com/Quadratic-Discriminant-Analysis-%28qda%29-tp22747647p22747647.html

I am trying to run, in R -Windows95, the example in MASS2, section 17.2. When I run predplot() on cush.lda I get > predplot(cush.lda, "LDA") Error: couldn't find function "max.col" I get the plot OK, but within predict(), it balks on max.col A more general question about using VR. Is there an easy way to use library on VR in general or do I have to move each into

can you run weft qda on mac with virtual PC? (this is how nvivo and some others work for the mac). us poor mac users...but i commend the open source effort! best, Lisa Lisa Schwartz Language Reading and Culture University of Arizona ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile.

Hi Weft QDA 1.0.1''s available now. It''s a bug-fix and maintenance release, and a recommended upgrade for existing users. What''s new: - fix for crash when moving categories using the Category Tree - fixed a bug on Win 98 and Win ME that made Weft a ''non-starter'' - avoid crashes with over-large and malformed text documents - fix a text scrolling bug on

I''ve encountered a small problem--some of the documents in my Documents and Categories window are not opening, while others are. Have others experienced this issue? If so, do you know how I might fix it? The coded segments of text are still there when I open up the categories with which documents have been tagged, but I can''t seem to pull up the whole text of some of these

z <- qda(train, cl) save(z, file = "qda.dat") load("qda.dat") predict(qda.dat, test)$class I'm trying to save z where z <-qda(train, cl) and load z for later use in predict(z, test)$class. I think I successfully saved z by save(z, file = "qda.dat") but when I tried to load by load("qda.dat") and call predict(qda.dat, test)$class, it gives me error

Hi, What does this mean when I have something like: > qda.boot <- boot(train, qda.bootstrap, R = 500) Error in qda.default(structure(data.matrix(x), class = "matrix"), ...) : Rank deficiency in group M with my qda.bootstrap() looks something like: > qda.bootstrap <- function(data, index) { + boot.qda <- qda(x = data[index, 2:9], group = data[index, 1]) + qda.pred

Dear R user, I'm using qda (quadratic discriminant analysis) function (package MASS) to classify 58 explanatory variables (numeric type with different ranges) using a grouping variable (factor 2 levels "0" "1"). I'm using the qda method for class 'data.frame' (in this way I don't need to specify a formula). Using the function:

Hi, my name is Leandro and im Argentinian. I plan to build a web CMS on ruby on rails, to provide CAQDAS functionality, and since im building the site in Ruby on Rails and open source, i want to know if Weft QDA engine is open source. If so, id would come in handy to be able to reuse/improve an existing ruby based CAQDAS. I''d like to emphasize the fact that i dont mean to profit from it,

Hi, the following strange error appears when I use qda: > qda1 <- qda(as.data.frame(mfilters[cvtrain,]),as.factor(traingroups)) Error: function is not a closure That's also strange: > qda1 <- qda(mfilters[cvtrain,],as.factor(traingroups)) Error in qda.default(mfilters[cvtrain, ], as.factor(traingroups)) : length of dimnames must match that of dims Some backgroud: >

You need to learn how to access code for nonexported methods. See ? "::" > methods(qda) [1] qda.data.frame* qda.default* qda.formula* qda.matrix* see '?methods' for accessing help and source code Shows you that the methods are not exported from the namespace. Hence you need to use the triple colon operator to see their code: > MASS:::qda Once you have the code, I

Hi Alex, Another posting said Weft cannot merge multiple projects, but can multiple people work on the same project at once on a share drive? Would they need to be coding different text files? Thank you, Brian Holzman Research Assistant American Institutes for Research 1000 Thomas Jefferson Street NW Washington, DC 20007 (202) 403-5077 -------------- next part

Perhaps, I should complement my previous e-mail question: I am trying to select variables through a quadratic discriminant analysis. It seems to me that a robust criterion is the value of the discriminatory power (i.e. the ratio of the separation of the class means to within-class variance) How can I obtain this ratio from V & R's qda() output ? Thanks (I hope this question is relevant) --