“Bi” means two and the term bivariate analysis refers to the understanding of the relationship between two variables. In comparison, univariate analysis is about analyzing one variable, while multivariate analysis refers to understanding relationships between more than two variables.

Bivariate analysis has a lot of use in real life because it can help understand the strength of the relationship between the two variables. But before bivariate analysis can define the strength of relationship, it first must define whether there is any casualty and association between two variables – whether the value of the dependent variable will change if the independent variable is modified.

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In this article, we are going to learn about the for loop in PHP – we are going to look at the for loop syntax through a simple example. In the end, we will learn what can we do if we want to introduce two conditions in a for loop and find a minimal value.

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This article is going to scratch the surface of descriptive statistics – we are going to define it and see what purpose it serves. With a help of descriptive statistics, we are going to take a look at univariate analysis – an analysis of a single variable – and we will observe the three major characteristics when observing a single variable – the distribution, the central tendency, and the dispersion, and we are going to take a quick peek at bivariate and multivariate analysis, so you have a better understanding of what analyzing one, two or more variables mean.

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What is a variable and what do we do with a variable? This and many more are just some of the things that we are going to learn in this article. These are the very basics of data science, but they are super important before you take a leap into topics that are much more complex. So, let’s start.
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If you want to be good in data science, you cannot underestimate data analytics and statistics. Both hate guessing and they both love facts. If you are knowledgeable in data analytics and statistics, you will be able to think critically and most of all make data-driven decisions. In this article, we are going to review the basic statistical terms every data scientist should be familiar with.
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The first thing you probably did is google search “what skills do I need to become a data scientist” phrase. And what did you get? You were faced with a relatively long list of skills required to become a data scientist, ranging from technical to nontechnical skills – from statistics to programming in Python and R, up to storytelling skills and making presentations. But who has all these skills? The good news is probably nobody. The fact is that two data scientists do have a sharable foundation of knowledge, nevertheless, each of them has their own narrow specialty, which is sometimes so deep that they couldn’t switch their jobs. One data scientist’s job could be close to a job of a statistician’s, while another could be an expert in Python. But, if you want to start with data science, where do you begin? Do you really have to be an expert in Phyton? Should your knowledge of statistical analytics be so deep? The fact is that data scientists have a diverse skill set that is usually not found in a single individual.
In this article, we are going to take a look at nontechnical and technical skills that are required (or at least some of them) to become a data scientist.

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If you are a complete scraping beginner, this article is for you. If not, move on, because we are going to learn about scraping and parsing, but without using regular expressions or any supporting libraries. Moreover, we will do it using basic PHP string functions. Sure, PHP is not the best language choice for scrapping and parsing but it’s easy to learn and comprehend so it is a good candidate for beginners. First, we are going to explain what parsing is. Then, we are going to have a look at arrays, the GET method, stream_context_create and file_get_contents functions. Afterward, we are going to apply the strpos and substr functions, and at the end of this mini-project, we are going to display the results using print_r function.
Roll your sleeves PHP beginner, we are diving in.

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In this article, we are going to learn the difference between crawling, scraping, and parsing in computer science. Sometimes these expressions are used interchangeably, but they are definitely not synonyms. Usually, crawling is the process that comes first – it is about following internal and external links, then comes scraping, which is about extracting bits of data that resulted from crawling, and then at the end comes parsing, which is all about breaking that data into specific, meaningful parts. Nevertheless, let’s look into these terms in more detail.
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In this article, you will get to know the innerHTML property of the HTML DOM and how is connected to JavaScript.

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Loops are a beautiful thing – they can cut down lines and lines of your code because loops are used to avoid repeating a block of code. Therefore, if you want to run one code time and time again, but each time with a different value, use a loop. Want to repeat some message 10 times? Use a loop.

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