search for: amathew

...package on Ubuntu 10.10, and I keep getting a warning message the XML could not be found and had non-zero exit status. How can I fix this problem? > install.packages() Loading Tcl/Tk interface ... done --- Please select a CRAN mirror for use in this session --- Installing package(s) into ‘/home/amathew/R/i686-pc-linux-gnu-library/2.13’ (as ‘lib’ is unspecified) trying URL ' http://streaming.stat.iastate.edu/CRAN/src/contrib/XML_3.4-0.tar.gz' Content type 'application/x-gzip' length 896195 bytes (875 Kb) opened URL ================================================== downloaded 875 K...

I'm running R in Ubuntu 10.10 and am trying to install the RODBC package. However, I get the following error message: ERROR: configuration failed for package ‘RODBC’ * removing ‘/home/amathew/R/i686-pc-linux-gnu-library/2.13/RODBC’ The downloaded packages are in ‘/tmp/RtmpekzPOQ/downloaded_packages’ Warning message: In install.packages() : installation of package 'RODBC' had non-zero exit status Can anyone help? I know I've encountered this problem in the past, it'...

...the other predictors). However, what I want to do is generate the same plot, with won don y axis and income on x axis, but the curves showing the probabilities for age and home. Not seeing how to do this in the effects documentation. Help! Thanks. -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...;data.frame': 66514 obs. of 2 variables: $ mwin: Factor w/ 3 levels "","ACCEPTED",..: 2 2 2 2 2 2 2 2 2 2 ... $ mbid: int 700 300 700 300 500 300 300 700 300 300 ... Can anyone tell me what I should do to fix the warnings. -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...so predictors in the logit model. Do I simply expand the expand.grid() function to include all the variables? So my question is how do I form a plot of a logit probability curve when I have 10 predictors? would be nice to do this in ggplot2. Thanks! -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...ance", "<NA>")) one Can anyone point me in the right direction? I'm still not too familiar with regex or gsub to find a solution, and there doesn't seem to be anything helpful in the stringr package for this task. Thanks -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...I'm trying to find is the predicted price for every possible combination of values in the independent variables. So Expected price when: weather=1, gender=male weather=1, gender=female weather=2, gender=male etc. Can anyone help with this problem? -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...What I am trying to do is group the data into one hour increment. So 5:01-6:00am, 6:01-7:00am, 7:01-8:00a, and so forth. However, I'm not sure if there's a simple route to do this in R or how to do it. Can anyone point me in the right direction? -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...= "raw") So far, so good I think (???). I want to know if there is any diagnostic test to determine the overall misclassification rate of a NB classifier, and if there is a function in R that is available to implement it? Thanks, Abraham -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...at info in R. The percentage of a bid being sold at the same purchase price. Can anyone point me in the right direction. f = data.frame(bid=c(3,5,5,8,3,5,4,2,3,5), purchase=c(6,3,4,5,5,5,6,2,3,7), sold=c(0,1,0,0,0,1,1,0,0,1)) f Thanks. -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...uc2) levels(educ2) The above code is how I regrouped the variable. How can I regroup it so that it's levels are from lowest to highest. What if they're numeric values" -- *Abraham Mathew Statistical Analyst This or That Media, Inc. abraham@thisorthat.com 720-648-0108 @abmathewks www.amathew.com * [[alternative HTML version deleted]]

...t$final_purchase_amount) table(dat$final_purchase_amount) However, this doesn't seem to produce any levels and returns the following. > levels(dat$final_purchase_amount)character(0) Can anyone point to what I'm doing wrong. Thanks! -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

I'm an R newbie and had a question about the read.xls function. I've heard that this is often not a reliable function to use for importing data. However, I have created numerous xls files which contain information about voter turnout and macroeconomic indicators in India. I'm writing a paper on the relationship between economic growth and voter turnout. This is the command I use:

...tor(df$home) df$income = as.factor(df$income) df$gender = as.factor(df$gender) str(df) m1 = glm(factor(sell) ~ home + income + gender, data=df, family=binomial(link="logit")) summary(m1) library(TeachingDemos) TkPredict(m1) Thanks -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...(dta) %in% vars, drop = FALSE] : incorrect number of dimensions I googled this problem and couldn't find anything, minus a question by me on this same problem from 1.5 years ago. Just don't remember what I did to solve the problem. Help! -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...dit=1) Error in dta[complete.cases(mf), names(dta) %in% vars, drop = FALSE] : incorrect number of dimensions Can anyone tell me what I might be doing wrong. If not, can you give me an alternative solution that I can use to generate the probabilities. -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...mod, type=1)Error in dta[complete.cases(mf), names(dta) %in% vars, drop = FALSE] : incorrect number of dimensions When I ran the model, I ran everything but the explanatory variable as a numeric variable. Now, I'm trying everything and no luck. -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...0, I get 49%. At 500, it's 49% and at 700 it's 50%. At 1500, it's 51% These results are just really weird. I was expecting an exponential curve when I plotted mbid by probability of winning, but that doesn't seem to be the case -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...uot;won","sold","insured","credit"), col = "red", fill = "grey") bn.hc <- hc(dat, score = "aic") graphviz.plot(bn.hc, highlight=highlight.opts) Thanks, Abraham -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]

...graphics grDevices utils datasets methods base other attached packages: [1] effects_2.2-1 colorspace_1.1-1 nnet_7.3-1 MASS_7.3-16 lattice_0.20-0 foreign_0.8-46 loaded via a namespace (and not attached): [1] tools_2.14.0 -- *Abraham Mathew Statistical Analyst www.amathew.com 720-648-0108 @abmathewks* [[alternative HTML version deleted]]