Walking Through The Data Preparation Journey


Data preparation is a key part of the analytics process. It involves cleaning, transforming and enriching your data. You can use R language to perform data cleansing and prepare it for analysis. In this blog, I will walk through how to perform data preparation with R using CRAN packages such as dplyr, tidyr, stringr and others.

Data Preparation Defined

Data preparation is the process of transforming data into a form that is useful for analysis. Data preparation is an important step in the data science process and involves cleaning, manipulating and organizing your data so that it can be used for analytics purposes. It’s not just about getting rid of bad values or outliers; it’s also about making sure that all relevant information has been captured from each column of your dataset so you’re confident about what conclusions you can draw from analysis.

Data preparation should happen at every stage of a project – not just when you’re ready to start analyzing! It’s important because even if there are no obvious problems with your data now (e.g., missing values), there may be some later on down the line which could affect results if left unchecked now rather than later when they might become more noticeable/problematic due to other changes happening around them within their context.”

Data preparation with R

In this lesson, we’ll cover the basics of data preparation with R. We’ll start by importing our dataset into R and cleaning it up–removing any unnecessary characters, correcting spelling errors and other inconsistencies in the data. Then we’ll transform our data so that it’s easier to work with: for example, converting all dates into a consistent format (e.g., “mm/dd/yyyy”) or adjusting values so they fall within a certain range (e.g., all prices between $0-$100). Finally, we’ll check our data quality by running some basic checks on each column of information in our spreadsheet; this step is important because bad data can lead to faulty conclusions!

We’ll also talk about de-duplicating various pieces of information so that each row only contains one instance of something like an email address or phone number–this will help ensure accuracy when doing further analysis later on down the road!

Data cleansing with R

Data cleansing is the process of detecting and correcting errors in data. It’s an important step in preparing data for analysis, because it ensures that your results are accurate and reliable.

The difference between data preparation and cleansing is that while both involve cleaning up messy information, cleansing focuses on identifying problems with the content itself (such as typos), while preparation focuses on issues like format or structure.

Benefits of cleansing include:

  • Eliminating duplicate entries within a single column of your dataset so that you can use only one copy when analyzing multiple columns at once
  • Removing misspelled words from text fields

From data quality to analytics, there are many steps in preparing data for analysis.

Data quality is the measure of how close your data is to being accurate, complete and consistent. Data cleansing is the process of removing bad or inaccurate records from a dataset. Data transformation involves changing one form of data into another (e.g., a string into numeric values). Data integration refers to combining multiple datasets into one coherent whole so that it can be analysed together for insights about your business or research question(s).

Data reduction involves reducing the amount of information in order to make processing faster or less expensive by eliminating redundant information such as duplicate records or unnecessary fields from a table/column/database etc…

Data visualization allows you to see what’s happening with your data visually rather than relying on numbers alone – this helps when making decisions based on analysis results as well as communicating findings back out again through reports etc..


Data preparation is a complex process, but it doesn’t have to be overwhelming. By leveraging tools like R and SAS, you can streamline your data preparation workflow and save time while ensuring accuracy.

Florence Valencia

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