Couponmonk Blog

How To Install R and R Studio Server On Centos R is extensively used for data processing and analyzing. R has gained lot of popularity over the last few years because of data explosion over the mobile and web applications. To leverage the power of R and its eco system, one needs to have complete R suite of tools installed. Although there is large community of R developers and system administrators, I couldn't find a good resource where I could find everything about installing R and its tools in simple easy steps. That's why I decided to write this post. In this post, I will talk about installing following... R R Studio Server R Studio Connect Install R Please run following two commands to install R. sudo yum install epel-release sudo yum install R Type R -verson in your bash shell. You should see following output depending upon what version of R you have. To Bring up the R repl. Just type R and you should have your R shell started. To install any pa

In this post, I will show you how to use Python and LXML to crawl coupons and deals from coupon sites. The purpose of this post is to help users write crawlers with Python. To demo this, I will crawl coupons from couponannie.com and couponmonk.us. Example 1 Let us start with couponannie.com first. Let us first import the following two libraries.. import requests import lxml.html Most of the coupon sites have thousands of coupon pages. Most of the times, these pages are per company or site. These pages are structured templates. Therefore when we write a crawler for one coupon page, then it should work for all the coupon pages. In the case of couponannie also, this is the case. Let us pick the following url couponannie.com/stores/linkfool and extract the coupons and its related information. url = 'https://www.couponannie.com/stores/linkfool' We will use requests to get the content of above page as shown below. obj = requests.get(url) Let us convert the data in to