Tutorial by Examples: r

The pyplot interface to matplotlib might be the simplest way to close a figure. import matplotlib.pyplot as plt plt.plot([0, 1], [0, 1]) plt.close()

A specific figure can be closed by keeping its handle import matplotlib.pyplot as plt fig1 = plt.figure() # create first figure plt.plot([0, 1], [0, 1]) fig2 = plt.figure() # create second figure plt.plot([0, 1], [0, 1]) plt.close(fig1) # close first figure although second one is active ...

A path through every vertex exactly once is the same as ordering the vertex in some way. Thus, to calculate the minimum cost of travelling through every vertex exactly once, we can brute force every single one of the N! permutations of the numbers from 1 to N. Psuedocode minimum = INF for all per...

Notice that if we consider the path (in order): (1,2,3,4,6,0,5,7) and the path (1,2,3,5,0,6,7,4) The cost of going from vertex 1 to vertex 2 to vertex 3 remains the same, so why must it be recalculated? This result can be saved for later use. Let dp[bitmask][vertex] represent the minimum c...

db.collection.createIndex() method is used to create a 2dsphere index. The blueprint of a 2dsphere index : db.collection.createIndex( { <location field> : "2dsphere" } ) Here, the location field is the key and 2dsphere is the type of the index. In the following example we are goi...

Download the Stripe API Library and place it in vendor Folder source : [https://github.com/stripe/stripe-php][1] include the library in your controller use Stripe\BalanceTransaction; use Stripe\Charge; use Stripe\Stripe; require_once('../vendor/stripe/init.php'); set the strip key \Stripe...

NOTE: for best results, make sure your project was created using the Angular-CLI. npm install angular/{core,common,compiler,platform-browser,platform-browser-dynamic,http,router,forms,compiler-cli,tsc-wrapped,platform-server} You don't have to do this step if you project already has angular 2 an...

... "angularCompilerOptions": { "genDir": "./ngfactory" } ... This is the output folder of the compiler.

from the root of your project ./node_modules/.bin/ngc -p src where src is where all your angular 2 code lives. This will generate a folder called ngfactory where all your compiled code will live. "node_modules/.bin/ngc" -p src for windows

// this is the static platform browser, the usual counterpart is @angular/platform-browser-dynamic. import { platformBrowser } from '@angular/platform-browser'; // this is generated by the angular compiler import { AppModuleNgFactory } from './ngfactory/app/app.module.ngfactory'; // note the...

Once you've installed react and react-router, Its time to use both of them together. The syntax is very simple, you specify the url and the component you want to render when that url is opened <Route path="hello" component={ HelloComponent } /> This means when the url path is hell...

If there would be another value in the URL like: /Example/ProcessInput/2, the routing rules will threat the last number as a parameter passed into the action ProcessInput of controller Example. public ActionResult ProcessInput(int number) { ViewData["OutputMessage"] = string.format(...

Using a small transparent image called empty.png public class MyPage : ContentPage { public Page() { if (Device.OS == TargetPlatform.Android) NavigationPage.SetTitleIcon(this, "empty.png"); } }

Label label = new Label { Text = "text" }; if(Device.OS == TargetPlatform.iOS) { label.FontSize = label.FontSize - 2; }

Html: <nav class="navbar navbar-defalt" data-offset-top="120" data-spy="affix" > ... </nav> Css: <style> .navbar { background-color: red; } .navbar.affix { background-color: green; } </style>

At its core a perceptron model is one of the simplest supervised learning algorithms for binary classification. It is a type of linear classifier, i.e. a classification algorithm that makes its predictions based on a linear predictor function combining a set of weights with the feature vector. A ...

In this example I will go through the implementation of the perceptron model in C++ so that you can get a better idea of how it works. First things first it is a good practice to write down a simple algorithm of what we want to do. Algorithm: Make a the vector for the weights and initialize it ...

When we write an Web application in Grails, to deploy the application we need a "war" file that need's to be put in the servlet container (Tomcat etc). First goto the project directory : cd to_project_directory War file creation from command prompt : grails war 2.Its always r...

HTML Tag: Tag attributes look similar to html, however their values are just regular JavaScript. a(href='google.com') Google a(class='button', href='google.com') Google Result: <a href="google.com">Google</a><a href="google.com" class="button">G...

By default, all attributes are escaped (replacing special characters with escape sequences) to prevent attacks such as cross site scripting. If you need to use special characters you can use != instead of =. Code: div(escaped="<code>") div(unescaped!="<code>") R...