What is Data Cleansing?
By Matt Brennan
Your business is only as good as the data you collect. When you are sitting on top of unusable data, the ensuing analysis or algorithms are likely skewed. If your company relies on the information that it collects to make informed decisions for the future, then data cleansing or data cleaning is an essential step in ensuring the quality of those future decisions.
Data Cleansing is the Removal of Junk Data
It really is that simple. This can apply to data that is:
- Incorrectly formatted,
Over the lifetime of the data set, it’s only natural for data that fits these descriptions to seep into the dataset. It can easily impact any outcomes or algorithms that rely on the information at hand. Data cleaning isn’t a one-size-fits-all type activity. It’s something that will vary by need, and by the dataset in question. But it’s important to understand what needs to be done when the situation arises.
The Data Cleansing Process
While the data cleansing process may look different from company to company, or even dataset to dataset, there are some basic steps that can be applied to the process.
Remove Duplicate or Irrelevant Data
When you combine data sets, or scrape data, or receive data from multiple inputs, the potential for duplicate data increases immensely. Removing this data goes a long way in decluttering the data set and improving the quality of your algorithms and outputs.
The other type of data to keep in mind in these initial stages is irrelevant data. This is when you have information that doesn’t strongly pertain to the problem that you are collecting this data to solve. Sometimes businesses become overambitious in the data they collect, or the scope of what they collected may just be a little too wide.
Fixing these issues will go a long way in making your data more targeted and manageable. It’s an excellent initial step in the data cleansing process.
Correcting Structural Errors
Data collection is exacting. Structural errors can occur with strange naming conventions, typos, or inconsistent capitalization. When this happens, you can end up with inconsistencies, such as duplicate categories or classes that mean the same thing.
Address Your Unwanted Outliers
Data outliers happen. Sometimes they may be mistakes and sometimes the very existence of the outlier can prove whatever it is that you are working on. Evaluating your outliers with human eyes can help you determine their validity and how to proceed. If it is irrelevant or a mistake, you may want to remove them.
Missing data can throw off your algorithms. There are ways to address this issue, however. You could delete the observations that contain missing values, but this option may result in lost information. Another option might be to input missing values based on other observations. But this could jeopardize the data quality because you’re now operating from assumption, rather than observation. A third option might be to alter the way that you use data to navigate null values.
Once the Data is Cleaned
After the data is cleaned, you should have a data set that makes sense, and follows the appropriate rules. You should hopefully be able to follow trends to help you make sense of the data that’s been collected. Hopefully, these steps should help you in correcting any data quality issue.
Keeping more consistent data allows you to increase your overall productivity and make better decisions. It allows for more efficient business practices and happier employees. Data that is consistently cleansed helps you keep a smooth and efficient business.
If your outdated data becomes corrupted, contact We Recover Data to help.
Customer Reviews Total: 41 Review(s)
This service was rated 5 out of 5.0 based on 41 review(s)
Suddenly my hard drive crashed during on hangout with my friends. My most expected tour was not good at thinking about my hard drive. After return back, I went to WeRecoverData they saved my hard drive. That was appreciative.
I think it is the best company in the world regarding data recovery. They take all types of recovery cases with great responsibility and ensure they work with the best possible solution for your specific case. I highly recommend it.
Superb effort from werecoverdata. I had no idea how to fix it when I faced a horrible problem with my RAID NAS. But they solved it very quickly and superbly. I recommend them!
Thanks to all staff of werecoverdata for excellent work and for getting my company data back! I got frustrated when a deadly drop damaged my hard drive. But they solved it!
Few days ago my raid server is crashed dangerously. It was not starting any more. I tried in a various way whatever I know but I could not fix it. My uncle told me about WeRecoverdata. Then contact with them and they repaired it. Thank you guys.
Those are suffering bad experience of getting a reliable and professional recovery service provider, definitely, they can choose werecoverdata. I highly recommend it.
Thanks a lot
The location is a bit hard to find out but eventually, I did. They recovered my hard drive, which was mostly dead. Thanks a lot.
Definitely weRecover team is great to solve that kind of hard drive problem. Great response and remarkable. They recovered my all data successfully within short time. I wanna give special thank to David. Thanks a lot man.
Liked Your Service
I have been using my HP laptop since 2016. Few months ago I could not open my laptop. After pressing the power button its showing nothing. My friend told me about that company. They recovered my laptop. Now its working perfectly. Thanks a lot WeRecoverData.
Pretty good experience
It was really pretty good experience. They are so professional, punctual and reliable. I strongly recommend it.
A lot of thanks to werecoverdata. You did really remarkable work. I was frustrated when lost my important data from a hard drive. I sent my hard drive to WRD then they got all the data back. At first, I couldn’t believe anyone can recover it since my computer tech said he can’t do it. All credit goes to werecoverdata.
Fantastic service from all the guys at werecoverdata. I was having pressure when corrupted data from my hard drive .Then I went there and they fixed it superbly.Thanks for removing the pressure!
I faced horrible problem but they solved it extremely well.My problem was that hard drive crashed dangerously.At this moment I thought the sky was broken on my head.Thank you for that.
Thanks to WeRecoverData. You fixed the hard drive problem promptly. I am impressed… Anybody can rely on werecoverdata.
Obviously great work from werecoverdata.Definitely no doubt about this company because they take seriously to solve any kinds of problem.I have lot of assurance at them.A lot of thanks to them.
Oh Tom really fantastic work. You saved my important days. Raid 5 server damaged dangerously few days ago. But you fixed it well. Thank you for that!
All credits goes to werecoverdata for recovering raid server.I thought impossible to repair it but they was taken sensible and fixed it.Now I can fully trust on werecoverdata.All thanks to them.
Werecoverdata, you did a really very helpful work.I was angry when my hard drive got dropped from my mistakes. I recommend the company and give a lot of thanks to werecoverdata.
After my hard drive crashed I was going to be totally mad. One of mu cousin suggested me to meet that company. I did and got the best service ever I had.