search for: grassy

Hi. How can i simulate a binary data set from a logistic regression model?I need to manipulate parameters and so obtain my set of data. I want to show the improve in analyzing binary data with GLM(binomial) model instead of classical ANOVA or NON-MODELS procedures(relative risk-odds ratio-Pearson test of godness of fit...) Can you say me what is the right function to use? Do you know any

where is the cook-distance in R? i can't find it!please help me!

...ng colour palette centred on zero. This might be continuous in some colour space or composed of a small number of discrete colours, each of which covers a range of values. Or it could be piecewise continuous as used in topographic maps - less than zero is blue, zero to 400 goes from sandy yellow to grassy green, 400 to 1000 goes from grassy green to rocky brown, then suddenly you hit the ice and 1000 and upwards is white. Or you could have a multivariate mapping where (x,y,z) -> (r,g,b,a) in complex and non-linear ways. I see a set of factory functions that return colour scheme mapping function...

Hello, I did the same question on stackoverflow (http://stackoverflow.com/questions/15784373/process-substitution) but did not understand completely the issue so I'm reporting it here: " I've given a look around about what puzzles me and I only found this: http://stackoverflow.com/questions/4274171/do-some-programs-not-accept-process-substitution-for-input-files which is partially

Hello, I did the same question on stackoverflow (http://stackoverflow.com/questions/15784373/process-substitution) but did not understand completely the issue so I'm reporting it here: " I've given a look around about what puzzles me and I only found this: http://stackoverflow.com/questions/4274171/do-some-programs-not-accept-process-substitution-for-input-files which is partially

Hi. 1)I have two variables: call a<-c(e.g.0,3,6,7...) b<-c(e.g.6,8,3,4...) I want to create a third vector z wich contain the pairs values z<-c(0,6,3,8,6,3,7,4....and so on for each pairs (a,b)). There is a specific function? How can i write my own function? 2)When i try to write a function and then i save it like "function.R" file, i try to

...the cast function, from the reshape package, I get the following error: Error in `[.data.frame`(data, , variables, drop = FALSE) : undefined columns selected For example: data(french_fries) #available in the reshape package > head(french_fries) time treatment subject rep potato buttery grassy rancid painty 61 1 1 3 1 2.9 0.0 0.0 0.0 5.5 25 1 1 3 2 14.0 0.0 0.0 1.1 0.0 62 1 1 10 1 11.0 6.4 0.0 0.0 0.0 26 1 1 10 2 9.9 5.9 2.9 2.2 0.0 63 1 1...

how can i draw a 3d scatter plot? thank you.

Hy guy's, thank you for the fantastic job you are doing. I need to know if xen 3.1 will ever included in etch, basically for the suspend/live migration issue for HVM guest's in Xen 3.0.X. Best Regards Christian Grassi -------------- next part -------------- An HTML attachment was scrubbed... URL:

...the interaction of treatment with each type of "variable" in ff_d. Using the command below gets me this. Subject will get a column and each treatment type by each variable will also get a column with values for each. cast(ff_d, subject~treatment+variable) subject 1_potato 1_buttery 1_grassy 1_rancid 1_painty 2_potato 2_buttery .... 3_painty 1 3 18 18 18 18 18 18 18 .... 18 ... Now, if I want to look at just the the values for each variable by subject I can run the following command. cast(ff_d, subject~variable...

Hi, When i load my workspace, i visualize my object with the ls()function. First problem is that the saved graph is open like a list instead of an image!What is wrong? Second problem is about scatterplot graph: how can i identify a specific point? Thanks. Michele.