structure

I am trying to create a structure diagram from the data like the following: mydf <- data.frame ( group = rep (1:5, each = 20), z = rnorm (20, 10, 1), x = c(rnorm (20, 2, 0.5), rnorm (20, 2, 0.5), rnorm (20, 9, 0.5), rnorm (20, 9, 0.5),rnorm (20, 5, 0.5)), y = c(rnorm (20, 2, 0.5), rnorm (20, 9, 0.5), rnorm (20, 2, 0.5), rnorm (20, 9, 0.5), rnorm (20, 2, 0.5))) means <- aggregate(. ~ group, data = mydf, mean) gmx <-mean (mydf$x) gmy <- mean (mydf$y) library(ggplot2) ggplot(mydf, aes(x, y)) + geom_point(aes(colour= factor (group), size=z)) + theme_bw() I want make connect every points within

I wanted to ask whether it is possible to compare the complete database structure of two huge databases. We have two databases, the one is a development database, the other a production database. I've sometimes forgotten to make changes in to the production database, before we released some parts of our code, which results that the production database doesn't have the same structure, so if we release something we got some errors. Is there a way to compare the two, or synchronize? What about http://www.mysqldiff.org/ which is freeware? You can use the command line: mysqldump --skip-comments -

Is it possible to write an entire struct to a file example: struct date { char day[80]; int month; int year; }; pinkpanther Is it possible to write an entire struct to a file Your question is actually writing struct instances into file. You can use fwrite function to achieve this. You need to pass the reference in first argument. sizeof each object in the second argument Number of such objects to write in 3rd argument. File pointer in 4th argument. Don't forget to open the file in binary mode . You can read objects from file using fread. Careful with endianness when you are writing/reading in

A monad is a mathematical structure which is heavily used in (pure) functional programming, basically Haskell. However, there are many other mathematical structures available, like for example applicative functors, strong monads, or monoids. Some have more specific, some are more generic . Yet, monads are much more popular. Why is that? One explanation I came up with, is that they are a sweet spot between genericity and specificity. This means monads capture enough assumptions about the data to apply the algorithms we typically use and the data we usually have fulfills the monadic laws.

Where should utility functions live in Django? Functions like custom encrypting/decrypting a number, sending tweets, sending email, verifying object ownership, custom input validation, etc. Repetitive and custom stuff that I use in a number of places in my app. I'm definitely breaking DRY right now. I saw some demos where functions were defined in models.py, although that didn't seem conceptually right to me. Should they go in a "utilities" app that gets imported into my project? If so, where do they go in the utilities app? The models.py file there? Thanks for helping this n00b out. UPDATE:

I'm currently working on a new Vue.js application. It depends heavily on api calls to my backend database. For a lot of things I use Vuex stores because it manages shared data between my components. When looking at other Vue projects on github I see a special vuex directory with files that handles all the actions, states and so on. So when a component has to call the API, it includes the actions file from the vuex directory. But, for messages for example, I don't want to use Vuex because those data is only important for one specific view. I want to use the component specific data here. But

This question already has an answer here: Define functions in structs 8 answers I am trying to convert some C++ code to C and I am facing some problems. How can I define inside a structure a function? Like this: typedef struct { double x, y, z; struct Point *next; struct Point *prev; void act() {sth. to do here}; } Point; No, you cannot define a function within a struct in C. You can have a function pointer in a struct though but having a function pointer is very different from a member function in C++, namely there is no implicit this pointer to the containing struct instance. Contrived