Hi, I'm Ashish Khandelwal. Welcome to the course Data Modeling, and Regression Analysis in Business. In this tutorial, we are going to cover installation of all the required softwares and packages for this course. This tutorial is for Windows users. So if you're a Mac user, you should be watching the other video that is for Mac users. In this tutorial, we are going to cover installation of the following softwares, R version 4.0.0, RStudio version 1.2.5042, and finally, installing Rattle from within RStudio. To install R for Windows, you need to do a few things. So you need to go to this website called cran.r-project.org, and based on your machine it will automatically tell you which version to download, whether for Windows or Mac. So you should be downloading the Windows version. When you go to this website, you need to download this R 4.0.0 for Windows. Once you download this, you just have to double-click it to start the installation of the machine. We recommend that you select all the default options for the installation of R. Now let me show you how to do this on your machine. So I click here to open the web page, and here I have to select the R version for Windows. So I say, "Download R", and it's going to download this on my machine. It's going to take some time. So I'm pausing the video, and we'll start once it's downloaded. Hi, welcome back. So R is downloaded on my machine. Now I just need to start the installation. So to install, I just double-click it, and it will give me the window for the installation. I just have to keep pressing "Yes", and I have to continue with all the default options. You can keep pressing "Yes" and "OK" to continue the installation. So after we have installed R on our machine, we move to installing RStudio on our machines. To install RStudio on Windows, what we need to do is visit this page, and then choose the right version. So let's start with that. So I select this, and I come to this page for the RStudio. Here I need to select this version, open source license free, and I press "Download", and once I do that, it takes me to this Windows version, and I have to hit "Download" to start downloading. Now it's going to take some time so I'm pausing this video, and I'll start once it's downloaded on my machine. Welcome back. RStudio 1.2.5042 is downloaded on my machine. So I just have to double-click to start the installation. As soon as I double-click, it starts the installation. Again, as for R you just have to continue pressing "Yes", and select all the default options to install RStudio on your machine. Now I'm pausing this video, and start once RStudio is installed on my machine. Now RStudio is also installed on my machine. So we have installed R and RStudio on my machine. If you want to test whether RStudio is available on your machine or not, you can type RStudio here, and it should be shown here. You can start RStudio by clicking here. Once you are in RStudio, you can proceed further to install Rattle on your machine. But let me give you a quick brief layout of RStudio. So overall, RStudio is divided into four parts. That top-left is R script area where your.r or.rmd files are open. Bottom left is the console area where you can type your codes at the prompt and execute them. Top right is where all your data files that you get from outside of create data inside R, they all are available here. At the bottom right is the area for plotting. All the plots or charts that you create in your RStudio, they get rendered here. In fact, when you'll be working with Rattle, you will realize that any plot that you create in Rattle also gets rendered here. So from Rattle you have to come here to see or copy your plots. In the bottom right there are a few other options also, such as files, and packages which you can learn more about by watching this video. Now, once we have got R, and RStudio on our machine, all we need to do is we need to install Rattle, and other required packages from RStudio itself. So all you need to do is get this file pckg_install_windows.R from Coursera Module zero folder, and you just have to open this file on your RStudio and run it from there. I'm giving you this simple instructions to install Rattle using this file. So what you need to do is you need to open your RStudio, go to the "File" option on the top left, then go to "Open File". Once you click this, you will be able to browse your file wherever it is on your machine. You just have to click that file and it will open on your machine. After opening that file, what you need to do is you need to place the cursor on line 1, and then you can keep hitting this "Run" button and step through the file. Let me show you this on my RStudio. Install all these packages using this file called package_install_windows.R. So let's go to RStudio, so here is my RStudio. As you can see, there are these four different windows, and we need to get the file, your package_windows_install.R. The way to get that file is click here in the "File", and then "Open File". You can also do Control O. Once you do that, it is going to give you the option to browse your file within your machine. My file is in my downloads folder package_install_windows.R. So I'll just click and open it, and I have got this file open. Now, all I need to do is place my cursor on line 1, and then just keep pressing this button "Run", as you can see. This is going to run the codes step-by-step. These are many packages and that might take some time on your machine. So we are not depending on the configuration. So I'll start this. So now I am saying these are the list of packages that I need, and then I'm parsing this entire list in this install.packages, and I'm going to install these packages. It's asking, do I want to restart R before installing? I can do that. Yes, no problem. Then it will start installing all these packages. It might take some time depending on your machine's configuration. One thing that I want to tell you is what this dependencies equals true does is, these packages might actually be dependent on certain other packages. So when I say dependencies is equals true, all those other packages are also installed. For example, ggplot2 under the hood also uses deep layer package. So that should also be installed along with this. Now, all these packages are being installed, and they are installed on my machine. Now what I need to do is, I need to also install couple of these additional packages. Now, these additional packages, you can start working with the Rattle even without these right now. But somewhere in the course, we are going to use these packages. You might also install them later, that's fine, but we strongly recommend that you install them right away. So just you are good for this entire course. I'll just place my cursor here and do run again, and let all these packages install. Now, what is going to happen is after all these packages are installed, what I am going to do is I'm going to load the package Rattle in the current R session. That is something that you need to do every time. Installing is done once, but every time you restart your RStudio and R, you need to load the package in the current session, and that is done through this library function. I'm going to do this and then I will just start Rattle. Now, one thing, there may be one more package called GTK+ that might be required to install, which my RStudio would tell me if that's required, all I need to do is just say yes. So first, let me load this package. I loaded this package and then I run this line number 16, Rattle should start. Here, it's saying "Need GTK+". Now, I have the option to say "Install GTK+", "Okay" and that will install GDK+ on my machine. Once that's done, it will open Rattle in a separate window. So pretty soon, I should see a Rattle window open. Once you see that, that means your Rattle installation is successfully. Great. So we have got the Rattle open here. Now, there are many options for reading your data, exploring your data, transforming your data, running different models. You will learn the details about each of these in the respective lectures in the course, but I would suggest that you watch another video in this tutorial series to just learn about the main options in Rattle. That should give you a good start. But as I said, the major learning will happen through the lectures. So that was the purpose of this tutorial, that you should be able to install R, RStudio, and Rattle, and other required packages on your machine. Thank you.
