search for: weighed

Hey guys ,Hi :) I am working on a hack which will allow the user to specify a weighing scheme (along with the parameters , if he does not not want to use the default values) to build the Eset (rather than using the hard coded TradWeight scheme with default k=1 ) as Olly had suggested that we can probably get better terms (a more relevant Eset) for query expansion if we use say something

...1 x01      0.33     0.66     NA        3 2 x02      0.22     0.44     0.33     9 3 x03     NA       0.4       0.6       15 4 x04      0.16     0.33     0.5        24 5 x05      0.33     0.66     NA       15 6 x06      1           NA     NA       6 #and then calculate a rowsum, were each column is weighed by its associated factor in the vector "w", i.e. all entries in column df$a should be weighed by the factor 10.5, df$b by 9 and df$c by 12.8 and then summed up to a weighed rowsum (wrowsum=10.5*0.33+9*0.66). Any suggestions how to achieve this in a simple way with dataframes that have 90...

...; > > > > > id a b c sum > > 1 x01 0.33 0.66 NA 3 > > 2 x02 0.22 0.44 0.33 9 > > 3 x03 NA 0.4 0.6 15 > > 4 x04 0.16 0.33 0.5 24 > > 5 x05 0.33 0.66 NA 15 > > 6 x06 1 NA NA 6 > > > > #and then calculate a rowsum, were each column is weighed by its associated factor in the vector "w", i.e. all entries in column df$a should be weighed by the factor 10.5, df$b by 9 and df$c by 12.8 and then summed up to a weighed rowsum (wrowsum=10.5*0.33+9*0.66). > > > > Any suggestions how to achieve this in a simple way with...

Fellow R-helpers, Suppose we create a histogram as follows (although it could be any vector with zeroes in it): R> lenh <- hist(iris$Sepal.Length, br=seq(4, 8, 0.05)) R> lenh$counts [1] 0 0 0 0 0 1 0 3 0 1 0 4 0 2 0 5 0 6 0 10 0 9 0 4 0 [26] 1 0 6 0 7 0 6 0 8 0 7 0 3 0 6 0 6 0 4 0 9 0 7 0 5 [51] 0 2 0 8 0 3 0 4 0 1 0 1 0 3

...g a `for' loop, a vectorized version of this snippet - My actual dataset is large and it involves calculating the weighted mean of many columns. Such a loop becomes ugly to write and quite slow.... Thanks in advance, Vassilis -- View this message in context: http://r.789695.n4.nabble.com/weighed-mean-of-a-data-frame-row-by-row-tp3177421p3177421.html Sent from the R help mailing list archive at Nabble.com.

Hey guys,Hi :) I am now beginning work on modification of Eset so that that the user can specify one of the three of Xapian's inbuilt weighing scheme to build the Eset or code his own (similar to what we already allow for Mset) .Will read the code for Mset and Eset and see where it differs so as to know what code to write for Eset .Will mail the community once I am done with it.:) -Regards

Is there a function/package that performs weighted 2D density estimates? I haven't found anything searching with those keywords, but perhaps there is a more general algorithm that I should be looking for. Any hints appreciated. Thanks, Hadley

You are correct that the survreg routine only supports 'rho' of the Fleming-Harrington G-rho tests. This is a function of age -- I wrote the original code back when I was working with Tom (Fleming), and he was only using 1 parameter. Later he and David expanded the test to two parameters. This might be only the second request for the feature in the 30+ years since that date. Terry

Thank you Terry. Right now I can use comp() from survMisc package to do the 2-parameter version of F-H weighting. I think both SAS and stata offer the 2-parameter version, so just?thought it would be nice if survdiff() can have that option given it's standard package in R.? Thanks! John On Friday, February 16, 2018, 7:08:46 AM PST, Therneau, Terry M., Ph.D. <therneau at mayo.edu>

Hi all, I am running a set of logistic regressions, where we want to use some weights, and I am not sure whether what I am doing is reasonable or not. The dependent variable is turnout in an election - i.e. survey respondents were asked whether or not they voted. The percentage of those who say they voted is much higher than the actual turnout, probably due both to non-response bias and social

Hey guys, I had introduced myself earlier on IRC. I talked to Parth and had a brief chat with Olly, but just to re-iterate I'm Tejas Nikumbh, and I'm interested in contributing to Xapian for GSoC this year. I'm specifically interested in letor and weighing schemes projects. I've been able to build xapian on my machine without any errors via the Guidelines on the Hacking

Hey guys, Got a quick question and I hope this is an easy one! In my /etc/logrotate.conf file I have the following entry: # rotate all of the apache logs -- we'll rotate them here /var/log/mysqld.log { weekly size 50M create 0644 mysql mysql rotate 1 } And from that I would expect the log to rotate when it reaches 50M in size. However I just caught that log weighing

Hi Everyone, I am accustomed to PUTTY and it's very nice as in it allows many many SSH profiles to be saved and allows tunneling etc....but it's not very good when it comes to scrolling up and down, colors, text size, and specially it doesn't give a title to the opened instance. Maybe giving the IP address as the title of the window would help a lot if you have many different servers

Hi all. I'm in the process of configuring a phone system for my family and friends. I'm wondering if I should try to implement the "Vertical Services" (http://www.nanpa.com/number_resource_info/vsc_assign) in the Asterisk dialplan, or if I should delegate those functions to the various ATA's. For example, the Sipura SPA 2002 can handle*69 internally. On the other

Dear Community, I have a data set with two columns, bird number and mass. Individual birds were captured 1-13 times and weighed each time. I would like to remove those individuals that were captured only once, so that I can assess mass variability per bird. I¹ve tried many approaches with no success. Can anyone recommend a way to remove individuals that were captured only once? Thanks, Ray [[alternative HTML version...

https://roundup.ffmpeg.org/roundup/ffmpeg/issue1197 I had originally encountered this problem using ffmpeg2theora. I switched to ffmpeg proper in an attempt to identify where the problem was at, and found that the problem persisted. As a result I had thought this was a problem with ffmpeg, but the ffmpeg folks seem to indicate that this is specific to Theora (too much finger pointing I think.) I

Dear R-helpers, i have the following situation: i have a bunch of y=b0 + b1*x from different studies, and want to estimate a "general" y=f(x). I only have the b0,b1's and R-squareds. Should i weigh the separate equations by their R-squared? thanks Remko ^'~,_,~'^'~,_,~'^'~,_,~'^'~,_,~'^'~,_,~'^'~,_,~' Remko Duursma, Ph.D. student

Hi everybody, I'm performing a cluster analysis (pkg "cluster") on a dataset which includes 15 variables: is there a way to know how much each variable weighs on the final clustering output? Thanks Alessandro

I try to find a circular filter that I can export to be used in a spatial software. Assuming, we have a matrix, representing 9x9 regularly spaced points with the center point 'filter[5, 5]'. In this example, I want to find a function that weighs all neighbor points within a distance of d=4 units with 1: > filter <- matrix(0, 9, 9) > filter <- function() ... > filter

#See David Williams' book "Weighing the odds", p286 y <- c(1.21, 0.51, 0.14, 1.62, -0.8, 0.72, -1.71, 0.84, 0.02, -0.12) ybar <- mean(y) ylength <- length(y) ybarv <- rep(ybar, ylength) x <- 1:ylength plot(x,y,asp=1,xlab="position",ylab="ybar",type="n",ylim=c(-1,1)) segments(x[1], ybar, x[ylength], ybar) segments(x,ybarv,x,y)