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Toral Shah

Wed Developer  


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$12 /hr
India
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NLP is a branch of data science that consists of systematic processes for analyzing, understanding, and deriving information from the text information in a smart and efficient manner. By utilizing NLP and its parts, one can organize the massive chunks of text information, perform various automated tasks and solve a wide range of issues like – automatic summarization, machine translation, named entity recognition, relationship extraction, sentiment analysis, speech recognition, and topic segmentation etc.

 

NLTK (Natural Language Toolkit) is a leading platform for building Python programs to work with human language data. It provides easy-to-use interfaces to lexical resources like WordNet, along with a collection of text processing libraries for classification, tokenization, stemming, and tagging, parsing, and semantic reasoning, wrappers for industrial-strength NLP libraries.

 

NLTK has been called “a wonderful tool for teaching and working in, computational linguistics using Python,” and “an amazing library to play with natural language.”

 

Downloading and installing NLTK

  1. Install NLTK: run pip install nltk
  2. Test installation: run python then type import nltk and run nltk.download() and download all packages.

 

Pre-Processing with NLTK

The main issue with text data is that it's all in text format. However, the Machine learning algorithms need some variety of numerical feature vector so as to perform the task. Thus before we have a tendency to begin with any NLP project we'd like to pre-process it to form it ideal for working. Basic text pre-processing includes:

 

  • Converting the whole text into uppercase or lowercase, in order that the algorithm doesn't treat the same words completely different in several cases.
  • Tokenization: Process of converting the normal text strings into a list of tokens i.e. words that we actually want. The NLTK data package includes a pre-trained Punkt tokenizer for English.

 

           import nltk

           from nltk.tokenize import word_tokenize

           text = "God is Great! I won a lottery."

           print(word_tokenize(text))

           Output: ['God', 'is', 'Great', '!', 'I', 'won', 'a', 'lottery', '.']

 

  • Noise removal: Process of removing everything that isn’t in a standard number or letter.
  • Stop word removal: A stop word is a commonly used word (such as “the”, “a”, “an”, “in”). We would not want these words or taking up valuable processing time. For this, we can remove them easily, by storing a list of words that you consider to be stop words. NLTK (Natural Language Toolkit) in python has a list of stopwords stored in sixteen different languages. You can find them in the nltk_data directory.  home/Saad/nltk_data/corpora/stopwords is the directory address.

           import nltk

           from nltk.corpus import stopwords

           set(stopwords.words('english'))

 

  • Stemming: Stemming is the process of reducing the words to its root form. Example if we were to stem the following words: “Connects”, “Connecting”, “Connected”, “and Connection”, the result would be a single word “Connect”.

           # import these modules

           from nltk.stem import PorterStemmer

           from nltk.tokenize import word_tokenize   

           ps = PorterStemmer()  

           # choose some words to be stemmed

           words = ["Connect", "Connects", “Connected”, "Connecting", "Connection", "Connections"]

 

           for w in words:

           print(w, " : ", ps.stem(w)) 

 

  • Lemmatization: Lemmatization is the process of grouping along the various inflected forms of a word in order that they may be analyzed as a single item. Lemmatization is similar to stemming but it brings context to the words. Therefore it links words with similar meaning to one word.

           # import these modules

           from nltk.stem import WordNetLemmatizer  

           lemmatizer = WordNetLemmatizer()  

           print("rocks :", lemmatizer.lemmatize("rocks"))

           print("corpora :", lemmatizer.lemmatize("corpora"))  

           # a denotes adjective in "pos"

          print("better :", lemmatizer.lemmatize("better", pos ="a"))

 

          -> rocks : rock

          -> corpora : corpus

          -> better : good

 

Now we need to transform text into a meaningful vector array. This vector array is a representation of text that describes the occurrence of words within a document. For example, if our dictionary contains the words {Learning, is, the, not, great}, and we want to vectorize the text “Learning is great”, we would have the following vector: (1, 1, 0, 0, 1). A problem is that extremely frequent words begin to dominate within the document (e.g. larger score), however might not contain as much informational content. Also, it will offer additional weight to longer documents than shorter documents.

 

One approach is to rescale the frequency of words or the scores for frequent words called Term Frequency-Inverse Document Frequency.

 

  • Term Frequency: is a scoring of the frequency of the word in the current document.

           TF = (Number of times term t appears in a document)/ (Number of terms in the document)

 

  • Inverse Document Frequency: It is a scoring of how rare the word is across documents.

           IDF = 1+log(N/n), where, N is the number of documents and n is the number of documents a term t has appeared in.

 

           Tf-idf weight is a weight often used in information retrieval and text mining.

           Tf-IDF can be implemented in scikit learn as:

 

           from sklearn.feature_extraction.text import TfidfVectorizer

           corpus = [

           ...     'This is the first document.’

           ...     'This document is the second document.’

           ...     'And this is the third one.’

           ...     'Is this the first document?',]

           >>> vectorizer = TfidfVectorizer()

           >>> X = vectorizer.fit_transform(corpus)

           >>> print(vectorizer.get_feature_names())

           ['and', 'document', 'first', 'is', 'one', 'second', 'the', 'third', 'this']

           >>> print(X.shape)

           (4, 9)

 

  • Cosine similarity: TF-IDF is a transformation applied to texts to get two real-valued vectors in vector space. We can then obtain the Cosine similarity of any pair of vectors by taking their dot product and dividing that by the product of their norms. That yields the cosine of the angle between the vectors. Cosine similarity is a measure of similarity between two non-zero vectors.

           Cosine Similarity (d1, d2) =  Dot product(d1, d2) / ||d1|| * ||d2||

 

          import numpy as np

          from sklearn.metrics.pairwise import cosine_similarity

          # vectors

          a = np.array([1,2,3])

          b = np.array([1,1,4])

          # manually compute cosine similarity

          dot = np.dot(a, b)

          norma = np.linalg.norm(a)

          normb = np.linalg.norm(b)

          cos = dot / (norma * normb)

 

After completion of cosine similarity matric we perform algorithmic operation on it for Document similarity calculation, sentiment analysis, topic segmentation etc.

 

I have done my best to make the article simple and interesting for you, hope you found it useful and interesting too.

PHP (recursive acronym for PHP: Hypertext Pre-processor) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.

PHP is one of the main languages used in dynamic web development. It’s one of the oldest language and a common component in the LAMP stack (Linux, Apache, MySQL, PHP). If you want to create a website or any back-end web service, PHP is one of the main languages you can choose from. If you need revisions to an existing application that runs on a Linux server, it’s common for the back-end coding to be done with PHP.

About PHP Developers

PHP developers are often simply called “back-end engineers.” A PHP developer is responsible for writing server-side web application logic. PHP developers usually develop back-end components, connect the application with the other (often third-party) web services, and support the front-end developers by integrating their work with the application.

They’re turn client’s specifications into a workable, tangible product that runs on a web server. Although PHP can run in a Windows environment, it’s more commonly used on Linux servers with Apache running as the web client. Many PHP developers package their applications this way with Linux and Apache to make it easier for the client to host it.

PHP developers code the functionality and brings an app to life. Collaborating with designers, they ensure that the front-end application is appealing to users. You may find that some PHP developers have front-end design skills, but often times, they work with UI and UX designers to create a user interface that’s engaging and supported by solid back-end functionality.

What Can You Expect from a PHP Developer?

It is a PHP Developer's job to write, test and maintain the code for web pages and computer graphics programs. They use PHP, a widely used scripting language, to build websites, programs and applications that computers follow to perform functions. They are also responsible for writing, troubleshooting, testing and maintaining the source code for computer programs. If needed, PHP Developers also assist team members in problem solving.

What can you expect from a PHP Developer?

A PHP developer should be able to visualize your application and what you need based on your conversations and documentation (if you have any). They should be able to understand your business so that they can provide you with an application that supports your goals and business logic.

PHP developers mainly create two types of applications: web apps with a database background, and APIs that provide your existing software and data to mobile apps and other developers. PHP code powers the back end of a web app, so a PHP developer will design and architect your code and the way it works to support the front end. APIs are often used when developers or apps need to query your internal data, and they allow you to provide this data to the outside world. For instance, your app might pull a list of tweets from Twitter’s API. A PHP developer will read the API documentation and implement it into your website. APIs are also used with some mobile apps to power the app’s data services.

Deliverables could be full source code files, or some developers help you upload the code to your web server of your choice choice. If you’re building a website from scratch, it’s vital that you choose a developer with the skills necessary to tackle a project from the ground up. A senior-level developer will know how to manage a project (they might assign a project manager), set expectations, estimate costs, and give you organized, scalable code that you can work with for years.

Just like other development areas, PHP developers have a variety of skill sets and levels. Senior-level PHP experts often have several other languages in their arsenal. They should be able to design a full application from the ground up. Junior-level developers have a few years of experience, but they often need to work with, or have their work reviewed by, a senior-level developer to ensure that code is efficient and properly written.

Defining Your Project

A developer can only do as good of a job as the specifications or information they get from the client. Communication is key so that your PHP developer fully understands your concepts and goals. When you post a project, you must be able to communicate key elements so that you can get the best estimates from the best developers.

Before you post a project request or talk to developers, you should sit down and map out your idea. This can be done using images, presentations, or other types of documentation. For instance, you can draw your own wireframes and then explain each concept in writing. Developers bidding on your project can get a better idea of what needs to be done and estimate far more accurately.

It can be difficult for a client to understand the duration of a project and its cost, but a developer can sit down and discuss project scope, a reasonable timeline, and any deliverables that you can expect during the project’s development process.

Writing a Project Description

Once you know what you want from your end product, it’s time to write your project description. You need to be concise but provide enough detail to attract top developers. You can attach documents and provide video links to your project description to help developers better understand your goals.

Below is one sample of how a PHP project description may look. Keep in mind that many people use the term “job description,” but a full job description is only needed for employees. When engaging a freelancer as an independent contractor, you typically just need a statement of work, job post, or any other document that describes the work to be done.

Title: PHP Developer Needed to Build E-Commerce Website

Description: We need a PHP developer to build an e-commerce platform for our website. We have a rough wireframe document that explains the front end and the back end. We need help determining back-end architecture, so we want a developer to determine the way it will be built. We currently have hosting and need help uploading the code after it’s finished. The e-commerce store will host our product catalogue, take orders, allow customers to sign up, and then send email reminders to customers that left products in their shopping cart.

You can modify this description to better fit what you’re looking for, but it gives the basic requirements that a PHP development project might have.

PHP projects can take a long time, so expect a big project to take several months. PHP projects may require sit-downs to understand your requirements, design, coding, prototyping, and testing. All of these extend the deadline and can require several months for larger projects. A developer might even add a small percentage of time to the duration to ensure that deadlines are met. As with any project, the more descriptive your post is and the more you communicate with your programmer, the smoother the process will be.

WordPress is an open source Content Management System (CMS), which allows the users to build dynamic websites and blog. WordPress is the most popular blogging system on the web and allows updating, customizing and managing the website from its back-end CMS and components.

 

This article will teach you the basics of WordPress and how to hire a wordpress expert freelancer for building an amazing wordpress project. Here you will also find details about how to hire a wordpress theme developer, wordpress plugin developers on Toogit. With the help of these experts you can create websites with ease. Before posting a wordpress project it is important to know that Wordpress is divided into 2 major modules backend (also called wordpress admin) and frontend (A wordpress site). 

 

What kind of work I can do with Wordpress?

Project Management is the key to successfully and effectively manage every task that needs to be completed in a project. When a team is involved in a project, it becomes essential to have some sort of project management system to keep track of the work growth.

Many people opt for expensive project management software when they need a project management tool. But did you know you could do that with WordPress? Many people believe that WordPress is just good for publishing. But the increasing number of websites built with WordPress for different purposes such as e-commerce is a proof that WordPress can do more than you think.

 

Why is WordPress Free? Are there any hidden costs? What is the Catch?

One of the most often asked question to search engines by users is "Do I have to pay to use WordPress?". And everytime search engines tell them that WordPress is a free and open source software, which is usually followed by, “Why is WordPress Free?”. In this article, we will discuss why WordPress is free, the costs of running a WordPress site, and what’s the catch?

 

WordPress is an open source software. It is free in the sense of freedom not in the sense of free beer:

 

You may ask what is the difference between these two? 

Open Source software comes with freedom for you to use, modify, build upon, and redistribute the software in any way you like. However, there might be costs involved somewhere. 

 

What are the Features of wordpress

User Management: It allows managing the user information such as changing the role of the users to (subscriber, contributor, author, editor or administrator), create or delete the user, change the password and user information. The main role of the user manager is Authentication.

 

 

Media Management: It is the tool for managing the media files and folder, in which you can easily upload, organize and manage the media files on your website.

 

Theme System: It allows modifying the site view and functionality. It includes images, stylesheet, template files and custom pages.

 

Extend with Plugins: Several plugins are available which provides custom functions and features according to the users need.

 

Search Engine Optimization: It provides several search engine optimization (SEO) tools which makes on-site SEO simple.

 

Multilingual: It allows translating the entire content into the language preferred by the user.

 

Importers: It allows importing data in the form of posts. It imports custom files, comments, post pages and tags.

 

6 Reasons why you should choose wordpress for an enterprise site

Building an enterprise website is, by definition, a huge undertaking. The last thing you want is to invest your project’s resources into the wrong framework, which could potentially set you back thousands of dollars and countless wasted hours.

 

 

Naturally, many people are big fans of WordPress! It’s a well-supported, flexible, and open-source framework that’s powerful enough to develop all manner of websites. As a platform that’s now over ten years old, it’s stable and packed with extensible features that enable you to build almost any website or web app you can imagine.

 

1. It’s Flexible, Open-Source, and Free

Of course, WordPress is open-source. It means the original source code is freely available for personal and commercial use, and you can redistribute it or modify it however you see fit.

 

This makes WordPress an ideal candidate for enterprise sites for a number of reasons. Firstly, given its dominance on the web, you’ll have one of the largest developer communities at your back. This means you’ll receive regular security and feature improvements without paying any additional fees.

 

Secondly, it’s easily customizable for your own specific needs from the very beginning. In other words, WordPress is incredibly flexible with regard to any bespoke functionality you need to build or source.

 

2. WordPress is Ready for Responsive Development

Responsive development is what makes a design work across all devices, whether that’s a desktop or smartphone display. Since WordPress enables you to build completely custom themes, your enterprise site can sport whatever skin you need it to. Considering that mobile devices are the primary driver for digital media growth, your enterprise site definitely needs to be responsive.

 

3. WordPress is Scalable

Scalability affects your ability to serve increasingly large numbers of visitors. If no effort has been made here, even a simple website will crash after receiving one too many visitors at once.

 

4. It Offers Multisite Functionality

Simply put, Multisite is when you operate multiple websites from one central hub. WordPress supports running as many sites as you need from one core installation

 

5. It Has Built-In User Role Management

Role management essentially gives you the power to control who can access certain areas of your site. One of the guiding principles for security is to only offer access to the essentials a user needs to carry out their tasks.

 

6. WordPress Has Its Own REST API

We would be remiss to discuss WordPress viability for enterprise sites without pointing out the REST API. Endpoints were included in a recent update, and it means you can now tie WordPress to a number of external apps and languages by using technology such as AJAX and JSON.

 

How to choose a right wordpress developer?

Before you start with hiring It is necessary to catch what you are planing to develop and who is the right candidate to achieve your goals. 

Here I am describing few points which will help you to find the right developer for your wordpress project, 

1. Wordress developer must be aware of the basics of HTML and CSS. If you are a wordpress developer and are not aware of these concepts, then I suggest first go through short tutorials on HTML and CSS.

 

2. Good knowledge about trending database & experience in complex query.

 

Every wordpress developer should be able to do following:

Using a mix of CSS, Sass, HTML, JavaScript, and PHP , a WordPress developer takes a basic WordPress install and builds onto that foundation to create whatever you need for your project. At the heart of the WordPress platform its easy-to-use administrative dashboard, the portal where you, the client, can update and maintain your site’s content.

Review & hire your best wordpress developer.

 

Should I use wordpress?

If you are planing to develope a big project with wordpress. Please look at the following point before choosing the wordpress as best fit for your project.

Using several plugins can make the website heavy to load and run.

PHP knowledge is required to make modifications or changes in the WordPress website.

Sometimes software needs to be updated to keep the WordPress up-to-date with the current browsers and mobile devices. Updating WordPress version leads to loss of data, so it is recommended to keep a backup copy of the website as required.

Modifying and formatting the graphic images and tables is difficult.

 

Conclusion

If you want open-source flexibility and a strong community behind you, WordPress is a fantastic choice for your next enterprise site. Of course, you should still carefully examine your needs and carry out some research to find the best fit for your project. However, with its current dominance and upward turn, WordPress is clearly a tantalizing option.

 

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