Easy Tech Tutorials

Data preprocessing is a crucial part of data analysis. There are different methods for handling missing data. Doing so effectively will determine the accuracy of your model. I enjoy using the sklearn-pandas library when possible, as DataFrameMapper seemingly bridges the gap between scikit-learn's abilities and pandas data structures. Here, we will use this to avoid data imputation on a particular column and instead remove rows with missing values in this column from the dataset. Do note that whether one should remove data versus the decision to substitute values should be decided on a case-by-case basis. The factors involving this decision are beyond the scope of this tutorial. Deleting rows where column[xxx] value is null I received the following question regarding working on a dataset in pandas: "Hello, I'm using the sklearn-pandas.DataFrameMapper to preprocess my data. I prefer not to impute values for a particular column. Instead, I want to exclude any rows where ...

One of my favorite things to do is check out who’s been sharing my stuff on social media (it’s a nice boost to the ole ego.) And hey, it’s a great way to find new places to strategically share your content or give the share a boost. I use the following bagful of tricks to find the presence of my blog posts and articles on social media. How to Find Your Content Reposted on Pinterest Pinterest is the easiest social media network to work with in terms of finding whether your stuff has been shared. To find out what stuff from your blog has been shared on Pinterest, put http://www.pinterest.com/source/ in your address bar, followed by your blog’s URL (without the HTTP and WWW stuff.) For example, my URL is melbel.hubpages.com. To see which of my articles people have shared on Pinterest, I go to http://www.pinterest.com/source/melbel.hubpages.com/ and voilà! How to Track Retweets on X/Twitter X is slightly more painful than Pinterest. If you have a badge on each of your blog posts, like ...

If you want to start up a web server or perhaps just want to add SSL capabilities to a pre-existing website, this quick tutorial may be useful to you. In a Unix environment, generating a key and certificate request or .key and .csr with OpenSSL is actually quite simple and stress-free. OpenSSL is a cryptographic toolkit that uses the SSL and TLS protocols, so this is what we will be using. Note: This tutorial was made using Ubuntu Server. Installing OpenSSL If you do not already have OpenSSL, you can quickly install it with:   sudo apt-get install openssl Did you know OpenSSL originated from a project called SSLeay which was developed in 1995? Generating a Key and Certificate Request With that out of the way, let's move on to making the key and Certificate Signing Request (or CSR for short.) This can all be done with one command. It's a doozy, but I'll explain each part of the command so you'll know what to use each bit for in the future. Head back to your termina...

Finding all occurrences of a particular character in a string in the Ruby programming language can be achieved in practically innumerable ways. You may want to choose your approach based on what you plan to do with the occurrences of these characters. In this tutorial, I will highlight ways to find all occurrences of a character in a string (not just the first one). Three Ways to Find All Instances of a Character in a String of Ruby Code Ruby's built-in count method allows you to count the number of times a character occurs in a string The built-in scan method allows you to see the characters themselves The index method allows you to retrieve the first location within a string where a character occurs All three methods can be used to clean data for pre-processing, which is the application I had in mind when making this guide. The method you choose to use should depend on your string and your desired outcome. Whatever your goal, my hope is that I've got you covered with a d...

Why Is My Facebook Ad Pending Review? After creating an advertisement through Facebook, you may notice that it doesn't go live right away. In fact, it seems to be "pending" for quite a while. When I created my first Facebook ad, I found it a little frustrating to have to wait so long. I mean, I'm giving them my money, right? I learned that there are some fairly compelling reasons why new ads sit in the pending pile. The biggest reason: Facebook manually reviews every single new ad campaign. With a large number of advertisers flocking to Facebook, your ad can sit in the queue for a while. How Long Will the Review Process Take? According to Facebook, if you create your ad during their business hours, it can take up to 12 hours for your ad to be reviewed. Once you've created your ad, it will be queued. So even if you create your ad during business hours, the reviewers still have to get through all the ads before yours. So what if you've scheduled your ad to ...

  If you have MyWebSearch Toolbar, MySearchDial, or My Way Speedbar (it's the same software) installed, chances are you've tried to remove it only to realize that it didn't fully uninstall. MyWebSearch is a pesky software that takes several steps to remove. You may have initially been interested in the software because it came with free things such as emoticons and smileys. However, if you've made it to this article, you already know that you just need it to be completely removed from your computer. This is likely because it slows down your computer, installs tracking cookies, and your anti-malware software considers it to be spyware. The Vundo Trojan horse virus is also related to MyWebSearch. Many computer users with the MyWebSearch Toolbar installed have also found their systems to be infected with the Vundo Trojan. Uninstalling MyWebSearch First, you'll want to remove the program using "Add or Remove Programs." If you have already done so, skip ahea...