similar to: histogram with mean for every break

Dear R-helpers, In my dataset I have two continuous variable (A and B) and one factor. I'm investigating the regression between the two variables usign the command lm(A ~ B, ...) but now I want to know the regression coefficient (r2) of A vs. B for every factors. I know that I can obtain this information with excel, but the factor have 68 levels...maybe [r] have a useful command. Thanks,

Dear R-users, I have to plot two xyplot, and I wish to enclose this two graphs with just one headline, the same x scale, the same grid etc. These parameters should tie in, in order to obtain, visually, a unique graph formed by two xyplot. I try to give an idea: xyplot1: |_|_|_| xyplot2: |_|_|_| what i want: | | | | |_|_|_| I tried to use the command

Dear R users, I'm using xyplot to obtain a graph about a correlation x~y for different years (a categoric variable). The program dispose automatically the graphs in this way: 2010 2007 2008 2009 2004 2005 2006 2001 2002 2003 1998 1999 2000 Which code should I use to obtain this sequance of graphs? 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 I have tried with

Dear [R] Users, I have implemented a linear model with this syntax: model<- lm (var_dependent ~ var_indipendent + factor + var_indipendent : factor, dataframe) anova (model) Response: var_dependent Df Sum Sq Mean Sq F value Pr(>F) var_indipendent 1 20.5522 20.5522 87.8701 1.167e-14 *** factor 1 0.1060

Dear R-Users, I'd like to have some tips about printing graph. I use the command par to print more graphs in one window:par(mfrow=c(6,1)); par(oma=c(2.5, 2.5, 2.5, 2.5)); par(mar=c(0.5,4, 0.5, 0.5)) But this command doesn't run with complex graphic command (i.e. xyplot, ternaryplot).How can I print more than one graph per page, when I work with this "elaborated" graph?Many

Dear R-Users, I'd like to have your help on this problem: I have two vectors:x<- c(0,1,0,0,0,0,0,0,0,0,0,1,0)y<- c(0,0,-10,0,0,-10,0,-10,0,0,0,0,0) And I want to know where the value -500 in y have a correspondence value 1 in x.Considering a buffer of one position before and after in x.i.e. in this example only the -10 in position y[3] satisfies the criteria, because x has in position

Dear R-users, I'm studing a DB, structured like this (just a little part of my dataset): _____________________________________________________________________________________________________________ Site Latitude Longitude Year Tot-Prod Total_Density dmp Dendoudi-1 15.441964 -13.540179 2005 3271.16 1007 16993.25 Dendoudi-2 15.397321 -13.611607

Dear R-Helpers, Parametric statistics are statistics where the population is assumed to fit any parametrized distributions (most typically the normal distribution). My problem is: 1) if my polulation is no normal 2) if the sample data of all replications and treatments were well fitted from the Weibull distribution (shape and scale parameters). Can be The shape and scale parameters compared

Dear Alex, I have read your question about post-hoc test: "Let's assume that according to Anova(lm(y~a*b, data=d)) the a:b interaction is significant, and I would like to know if there are specific combinations of a and b levels that differ from the control group. Are there any caveats against simply looking at the p-values in the output generated by summary(lm(y~a*b,data=d))? The

Dear R-Users, I'd like to have some tips for a ternaryplot ("vcd"). I have this dataframe: a<- c (0.1, 0.5, 0.5, 0.6, 0.2, 0, 0, 0.004166667, 0.45) b<- c (0.75,0.5,0,0.1,0.2,0.951612903,0.918103448,0.7875,0.45) c<- c (0.15,0,0.5,0.3,0.6,0.048387097,0.081896552,0.208333333,0.1) d<- c (500,2324.90,2551.44,1244.50, 551.22,-644.20,-377.17,-100, 2493.04)

hi there here is part of SPECS file: ------------------------------------------------------------------ CFLAGS="$RPM_OPT_FLAGS" ./configure \ --prefix=%{_prefix} \ --localstatedir=/var \ --sysconfdir=/etc \ --with-privatedir=%{_sysconfdir}/samba \ --with-fhs \ --with-quotas \ --with-smbmount \ --with-pam \

Dear R-users, I've a question regardiing multiple linear regression. Is it possible to regress a function of the type y=b0+b1*x1+b2*x2 constraining the partial derivatives dy/dx1 and dy/dx2 to be greater than 0 ??? Thank you very much for any possible suggestion. Best regards Marco -- Marco Pagani - PhD Student Dipartimento di Scienze della Terra - Sezione Geofisica Universita' degli

I'd like to use linear and quadratic trend analysis in order to find out a change in slope. Basically, I need to solve a similar problem as discussed in http://www.gseis.ucla.edu/courses/ed230bc1/cnotes4/trend1.html My subjects have counted dots: one dot, two dots, etc. up to 9 dots. The reaction time increases with increasing dots. The theory is that 1 up to 3 or 4 points can be counted

I am evaluating rsync for the mirroring of a website and associated database. To exercise it and establish the correct run string I need I am running tests LOCALLY between two test directories. I have a /scratch/temp/Departure and a /scratch/temp/Arrival trees. I apply changes to the Departure tree, run rsync, and do a diff -r. Now I delete a file in Departure rm Departure/Quattro/uno.file

Hi, if i have data in the following time series format: time, amount, state 1 2222 A 1 333 B 2 45 A 2 77 B where states could be n and time periods t is there a package in R that would calculate the transition probabilities in a markov chain. for each t except t=0 to generate A B A B perhaps the best structure might

Hello Cecilia, nice hearing from you again. I must restate a couple of my old hints, though ;^) 1) please always put the authors c/c, as we are not guaranteed to browse through the r-help every day 2) please provide reproducible examples. As example(pooltest) keeps working fine, as do some other cases I tried (Grunfeld data etc.), I don't know what the problem is but evidently your data are

I am trying to arrange a mirroring of two trees which will be arranged like this : --- top --- .htaccess a --- a number of log files a +-- Files --- contains local stuff b +-- dir1 --- files c +-- dir2 --- files c |

Thanks to Tim Conway and Phil Marek. The correct way(s) to synchronize two directory trees is to avoid a trailing "*" after the origin directory (either use a . or nothing) rsync -rlptPzu --delete /scratch/temp/Departure/. /scratch/temp/Arrival/ rsync -rlptPzu --delete /scratch/temp/Departure/ /scratch/temp/Arrival/ I was misled by my first tests rsync -rlptPzu --delete

Hi all, I have a has_many relation between Parent and Child Parent p Child c p.children << c => create the relationship in the database (why not need p.save to see the child add?) why when i modifiy a field in c.how_old i have to explicity call to c.save if i want to see the modification in database (p.save doesn''t persist the modification of chlild c) because when i modify

flight 8091 xen-unstable real [real] http://www.chiark.greenend.org.uk/~xensrcts/logs/8091/ Regressions :-( Tests which did not succeed and are blocking: test-amd64-i386-rhel6hvm-intel 12 guest-localmigrate/x10 fail REGR. vs. 8071 Tests which did not succeed, but are not blocking, including regressions (tests previously passed) regarded as allowable: test-amd64-amd64-xl-pcipt-intel 9