search for: composition

Have been looking into using rails but am finding the "Composite Primary Keys are Bad" thing a tad disturbing (to put it mildly). I have been working with RDBMS systems for over fifteen years and this is the first time I have herd the idea questioned. I have cone across using surrogate keys which mirror the composite key for performance reasons in VERY big databases but I have never

Dear R users, i am wondering if anyone has some hints for this problem (i have not found a clear answer after searching the R-mailing list archive, 'help.search' in R, and R-Wiki, and the like...): let's assume that i have 4 periods compositional time series data: t=1, A=0.1; B=0.5; C=0.4 t=2, A=0.2; B=0.4; C=0.4 t=3, A=0.5; B=0.3; C=0.2 t=4, A=0.4; B=0.3; C=0.3 t=5, ??? By using R, could anyone suggest how to obtain the forecasted value of the fifth period (t=5) as well as the forecast error? (it seems that 'mixeR...

The AWDwR book has the following: add_index :categories_products, [:product_id, :category_id] add_index :categories_products, :category_id The first, composite index actually serves two purposes: it creates an index which can be searched on both foreign key columns, and with most databases it also creates an index that enables fast lookup by the product id. The second index then completes

The compositional data xi=(x_i1,x_i2,...,x_in), for each fixed i , xij>0, and sum(xij)=1; I want to compare the mean( u_i) of several groups i.e. H0: u_1=u_2=...=u_N or H0: u_11=u_21=...=u_N1 Are there any ANOVA tpye tools to do this work in R? Thanks, WEN S Q [[alternative HTML version deleted]]

I've added a simple plugin to compiz that provides a way to render video efficiently on a composited desktop. A video playback client basically copies video data to a pixmap and sets an X property on a client window that describes the image format of the data and where it should be rendered. The compiz video plugin will scale and perform necessary colorspace conversions when compositing the

I notice compositions was removed on CRAN, that's one I want to try out. I downloaded the last tarball, the build output doesn't look that bad. A warning, no errors. $ R CMD build compositions * checking for file ?compositions/DESCRIPTION? ... OK * preparing ?compositions?: * checking DESCRIPTION meta-inform...

Hello, I try to compile Samba 4.11.6 on an old SLES11 machine. There is an old GNUTLS installed. Since I do not have root access and I have to use a newer GNUTLS-Version, I have installed gnutls-3.6.12 in a different location and set PKG_CONFIG_PATH appropriately. The configure script has run successfully, but when I run make (with verbose option), I get this error: 17:44:33 runner

Due to the foolish implied assumption that there''d never be a revision to activerecord library, the Composite Primary Key code promptly broke for anyone who updated their apps to Rails 1.1.6 (with its activerecord-1.14.4) Now the gem dependencies are fixed and your legacy databases are free to wield composite primary keys without fear again. Description: Composite Primary Keys

Does anyone know of R functions for doing composite quantile regression (Hou and Yuan Ann Stat 36:1108, 2008)? The paper's authors do not talk about software in their paper or on their web sites. Thanks Frank ----- Frank Harrell Department of Biostatistics, Vanderbilt University -- View this message in context: http://r.789695.n4.nabble.com/Composite-Quantile-Regression-tp4663463.html

I can enable compiz on default DISPLAY :0 on gnome on FC6, all features are OK, but when I set up a DISPLAY :2 with Xnest, try to run compiz in DISPLAY :2, fail, Error info: compiz: No composite extension I check compiz source code: if (!XQueryExtension (dpy, COMPOSITE_NAME, &d->compositeOpcode,

Danny, Kristian, All, First let me tell you guys whatever you are doing with compiz, keep it up! It's looking great! I have a new error on ArchLinux when running compiz 0.8.2.1 that I have never seen before. I installed Archlinux on 2 boxes to check it out. One on a x86_64 box with the nvidia driver (no problems there) and one on an i686 box with onboard intel video. When connecting over

I know ActiveRecord doesn''t support composite primary keys, but I need to use one, and I need it ASAP. I don''t need any composite foreign keys, luckily; what I have is a table that stores old versions of rows in another table, so the composite key is an id + date stamp. Would someone tell me a hack I can use to support this? -- View this message in context:

Hello: How do you create a composite view? I have a form based on the model "contacts" which consists the following models: - organization - person - address I was going to use partials to create the form; e.g: - organizations/_form.rhtml - people/_form.rhtml .etc ...and render them with the appropriate tag: <%= render_partial ''people/form'', @person %> I

Dear ?, I'm sure that there are many ways to do what you want; here's one: > cbind(concept_df, category= + ifelse(apply( + sapply(chemical_df$chemical, + function(x) grepl(x, concept_df$concept)), + 1, any), + "chemical", "")) concept category 1 butan

Right now rails doesn''t support composite keys, that is id1, id2, and id3 are in the primary key of the table. Does anyone know if this is being discussed for future versions, or is it pretty much out of scope? -- Posted via http://www.ruby-forum.com/.

We have recently migrated from CentOS6/Gnome to CentOS7/Mate - and have noticed 'glitches' with some Qt applications that appears to be linked to the 'org.mate.Marco.general' 'compositing-manager' setting - and wondered how we 'fix' the issue ... Below is a PyQT4 python script that shows the issues: 1. With 'compositing-manager' set to 'true' (I

Hi, As I understand, composite primary keys aren''t supported in ActiveRecord yet. May I ask if there are plans for this feature? Better yet, if this feature is under development, how''s the progress going? I''m not trying to use legacy databases. I tend to think that using multiple integer column id''s (composite primary key) are often natural way to

How can auto completion be done for a composite field ? Concrete problem : Suppose the class Person with reference to a City object. The City has a name and a postal code. When entering a Person I want to enter the city in one text field that shows a composition of the city name and the postal : "city (postal)". And this with auto complete (and should afterwards be linked to the person object) I don''t think that textfield_with_auto_complete solves the problem. any ideas ? I read about auto_complete_field, but I didn''t find...

Hello, Is it true that Rails doesn''t support composite primary keys? I have a legacy system and was pondering adding a new interface to it. This whole Rails thing (and yes, Ruby too) seems pretty interesting but I''d feel ashamed of myself adding an additional column called ''id'' when there''s already a perfectly good composite key. Assuming the rumors

> I would like to use compositions package with ggplot/ggtern, other > composition classes of compositional package can be used with ggtern > by converting to data frame but I could do anything with c(ount)comp > class. Ggplot/ggtern can not recognise comp and also can not be converted > to data frame. Is there any othe...