What is R programming language ?

What is R programming language?

So let’s, first understand the meaning of programming language R ?

This language was developed by Mr Ross Ihaka and Mr Robert Gentleman, who were associated with Department of Statistics with in UoA (University of Auckland). They initial release of R version in August 1993 which allowed statisticians’ students and others users to learn with programming skills which ultimately help in analyzing statistical on complex data analysis and graphical representation. Both the developer kept this language name on their first letter of their name “R”, R-oss and R-obert.

R language includes functioning to support various statistical methods for example

  • Linear Modeling Method,
  • Non-Linear Modeling Method,
  • Classifications Method,
  • Classical Statistics Method,
  • Clustering Method and much more.

This language is more popular among the students cause of its robust features and due to its open source software version. It is free to down-load in terms of Free Software Foundation (FSF) as general public license. This language support and can run on all type of popular operating systems Windows, mac OS & Linux.

R allowed users to use their own syntax, functions and code. In the R environment allows users to combine their individual needs, which may include adding different data set files into a one file of document. Its also allows users to pull out single variable from the data set and by running a regression, single function/code can be used multiple time in R environment.

Present world, the demand of the R language has gradually extend from students to business setups, institutes are also giving training to their students of data analysts, students of who trained on R more favorable in continue using this language rather than pick up a new software or tool with which they have not taken any experienced.

R has built with the standard command-line interface.

Users control this to read data and load it to the language interface, specify commands and achieve desired results.

R environments can be use after thru commands for Arithmetical Operators, that includes +, -, / and *, to more complex functions that act upon the Linear Regressions and more advance calculations. The looping functions are also trendy in the R programming environment.

All the above functions / command allow users to repeat same action without many hassles and in smoother manner. With the loop function, users can pull out the samples from a bigger data set basis the time line set by the user to specific task.

Like every language R also have few Advantage and Dis-advantage in it.

Advantage of R Language:
  • Open source language and free to download,
  • Offers complex data analytics capabilities
  • Active group of communities and users online for support.
  • 25 years old quite mature language.
  • Multiple add-on packages for enhancing the basic functionality
  • users to graphical data representation,
  • Integration with external database systems,
  • Geographically mapping of data and
  • It allows user to use advance level statistical functions.
  • Simplification of coding experience with R Studio

It has a much bigger library of statistical packages – Doing specialized statistical work. R has multiple packages with wide range of statistical tasks by using the CRAN task view.

In the toto we can say R packages also cover all from Psychometrics to the Genetics to Finance.

Disadvantage of R language
  • Utilizes only single-threaded processing system in basic open source version
  • Utilization of one CPU at a time – Slow analyses delivery for a larger data sets
  • Memory based application.
  • All data objects stored only in computers RAM during a given session which is also limit the size of data R is able to work on at one time.
Final word on R

Now days various software service providers have also added their support for R language into their offerings, allowing R to gain a stronger foot prints in the modern Data Analyst structure and big data dominion.

The service providers those offering support to R functions included big giants like IBM,

Microsoft, Oracle, SAS Institute, TIBCO and Tableau. Others small software players are also included R language integration in between their analytics software and the R programming language. There are also R packages available for popular open source big data platforms, including Hadoop and Spark.

It is Gudtoknow that now R language has ability to perform all statistical task,

R is almost unique among all other programming languages available for Data Analyst it is meant for all level of Data Miners.

WE CAN ALSO SAY DATA IS DEEPLY INSERTED IN BLOOD OF THIS LANGUAGE.

 Learn how to download and Install R and R Studio

How to download and Install R

How to download and Install R in computer ?

R is a wonderful powerhouse of open source programming language for statistical and graphical representation of the data sets.  It is totally different among all other programming languages available for Data Analyst, it is meant for all level of Data Miners. R generates graphics that are hugely extensible and are using by giant publications houses.

Users can download and install R in all the operating system including Windows, mac OS & Linux and R has very active and friendly online community.

Steps to download R in computer with windows operating system

  • Basis on your computers Operating System click the download link
  • Click on base and Click on Download R 3.5.1 for Windows (or the new version available)
  • Exe file will start download in the computer
  • Open the download file and install the R with default settings.

What is RStudio

  • Front-end console for R,
  • Scripting window for users
  • Graphical window and an R workspace, among other options.
  • Integrated Development Environment – IDE help users to be more productive.

Steps to download RStudio in computer with windows operating system

  • Download RStudio Desktop version on your Windows computer
  • Open this -> https://www.rstudio.com/products/rstudio/download/ link in your computer browser.
  • Download the free RStudio Desktop – RStudio 1.1.456 – Windows Vista/7/8/10 or latest version. Refer below screenshot.
  • Exe file (apprx 85 MB) will start download
  • Click on the downloaded exe file to open and install with all default settings

As we see these all have lots of free and open source software, hence it is slightly tricky for installation of all these different programs, more tricky to get them to work perfectly together.

Follow above steps for easy installation instructions – Get everything works fine for you.

Understand RStudio’s

RStudio large Console pane has four portions, left allows users to run R code.

R code can be run by typing directly into the Console pane.

Panes on right side provide related information as you start work with R.

Other two pane Environment and and History right side of the screen. The Our creation in R stored at Environment tab (which R calls objects) as we work with R while History pane tracks all R code that used.

Photo by Mimi Thian on Unsplash

Business Analysis

What is Business Analysis ?

What is Business Analysis?

Let’s first understand the definition of Business Analysis.

Business Analysis is the discipline of recognizing needs and finding the solution for the business problems and understands how to overcome from such problems.  In other words, Business Analysis is a set of tasks and techniques which work as a connection between all the stakeholders. These help them to understand organization’s policies, structure and process. These techniques also recommend the best fit solutions for the business in achieving its goals.

 

Business analysis is all about understanding that how your organization is functioning and meeting its purpose of existence. It also entails in defining the abilities the organisation needs and provide products to the all external stakeholders. Here you will have to understand how the goal of an organization connects to specific objectives and you will also have to make a detailed plan to help achieve the goals and objectives. In business analysis, you will define how stakeholders and different organizational units interact with each other.

 

Organisations can conduct business analysis to get an overview and feedback of the present state of the firm. You might use Business Analysis to identify your business needs too. More often, the analysis is performed to state & confirm solutions which ultimately meet the business needs.

 

Business Analysts main task is to analyze and synthesize information provided by the immense group of people who majorly interact with the firm. It may include firms Customers, Executives, Staff and IT professionals that send this information. Business Analysts do not only focus on the expressed desires but draw the actual needs of the stakeholders. Business Analyst facilitates communication between organizational units some times.

 

Now days following eight steps business analysts generally follow.

Each of the following steps is important for the business analysis.

 

  1. The Orientation

Generally people thinks that as soon as business analysts start contributing to the assigned projects and start making the positive impact. Business Analysts also get involved while the project is ongoing. It is essential that Business Analysts contribute some time to get oriented with the projects. They should be fully clarified with the scope, requirements and business objectives clearly allow them to spend some time to collect some basic information.

Following are the main responsibilities of the Business Analyst should have in first step:

  • Role of a Business Analyst should be clearly defined.
  • Shaping all the primary stakeholders in the project.
  • Project History should be clearly defined and understood by the Business Analyst
  • Existing systems and processes understanding
  1. Identification of Business’s Primary Objective

Most of the time business analysts start defining the project by the scope and this can cause problems. It is more effective to understand the business needs and objective before defining the scope of the project.

The responsibilities in this step are as follows :

  • Identification expectations of the primary stakeholders’ in the organisation.
  • Merging of all conflicting expectations. The business community generally begins the project by sharing and understanding of the objectives.
  • Business Objective should be defined at the first stage while defining business scope.
  • Analyst also needs to make sure that the business objectives are clear and achievable.
  1. Scope Defining

Define very clear and complete statement as scope of the business. Clear Scope will definitely serve as a progress concept and help the team to understand the business needs. Here, we need to remember, scope is not a tool to implement the business plan. Rather, it not guides all the steps of the business analysis process.

This step has the following responsibilities for the business analysts:

  • Solution defining – a method that find the nature and extent of technology and the process changes which should be made.
  • Clear scope statement Drafting and review it with the stakeholders.
  1. Creation of Business Analysis plan

Creation of business analysis plan will provide clarity to the end to end process of business analysis.

This plan will itself answer several questions.

  • Following are the main responsibilities of plan involved while creating a business analysis plan are:
  • Business Analysis deliverable choice should be most appropriate types.
  • Proper defining the specific list of deliverable for business analysis. The list should cover full scope and identification of the all stakeholders.
  • Business Analysis deliverable should have definite timelines to accomplish the goal.
  1. Requirements Documents should have proper draft

In this step the clear and actionable detailed requirements of the plan are important. This requirement document should have all the details for implementation team, so that, they devise the solution.

The most important responsibilities are involved in this process :

  • Collection of all the information required
  • Information should be analysis for making the first draft
  • Validation of the deliverable with proper review
  • All gaps should be filled up by asking questions.
  1. Support to the technical implementation

In a firm technical implementation team develop, customize and deploys software or hardware on a typical project.

Following are the main duties of the business analysts in this step :

  • Final solution & design should be reviewed.
  • Updating the Requirements Documentation and repackaging time to time.
  • Meeting and understanding the importance of technical requirements of the quality assurance professionals
  • Readiness to answer of all the questions and help solve certain problems.
  • Change management in the requirements.
  • User Acceptance Testing (UAT) efforts when possible.
  1. Help the organisation in implementation of the solution

It is also observe that sometimes a business cannot use the solutions appropriately. Resulting into difficulties into attain the original objectives. Business Analyst must be involved in this final step to extend support to the business. The main aim of this step is to ensure that all members are prepared to accept the changes made.

Business analysts responsibilities in this step are :

  • Analysis and developing of the interim business process documentations. These documents generally state exactly what changes in the business process should be made.
  • Support with training to the end users. All end users must understand all the process and procedural changes. The analyst should also collaborate with training staff to train the end users.
  • business users collaboration
  1. Study of the value created by solution provided

Throughout of the business analysis process, a lot of steps are involved and various business outcomes and details are discussed. Solution to all type of big and small problems. Many relationships are built, and changes are managed in the entire journey. You should try not to lose track amid the steps. Stop and assess the value created by the solution provided.

The key responsibilities involved in this last step are:

  • Evaluation of the actual progress.
  • Results orientation to the project sponsor. Results communication to the Project and other team members of the company is also essential in some cases.
  • Follow-up of the projects.
  • Once business analyst completes this last step, it is also expected that the company will find more opportunities. It will help the business to improve and lead to additional projects.

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