Hi friends & readers of Chandoo.org,
I am very happy to invite you to our newest online class, 50 ways to analyze your data. This program makes you an awesome analyst, training you on vital skills like data analysis, data science, visualization, modeling business problems and finding best solutions.
Please click here to know more about this program & enroll.
What is this course?
It is the age of big data. Alas, what we need is big insights. But finding even small insights buried in our data is a hard task. To find the stories hidden in your data, you need to follow a process like this:
- Collect & clean data
- Structure the data
- Model business problems
- Analyze the data (or solve the problem)
- Visualize results
- Find conclusions
- Add layers of complexity to the problem
- Build what-if scenarios
- Reach conclusions
- Take action
This is where the 50 ways to analyze your data course helps. In this program, we analyze 50 familiar, important and diverse business situations using several of the above steps.Continue »
Every week, we read news about failed analysis projects. If you listen carefully, you can hear the grunts, screams and curses of thousands of analysts all over the world about their analysis nightmares.
At Chandoo.org, we talk a lot about best practices for data analytics. So today, let’s peek in to the dark side and understand the mistakes that can turn your analysis project into a nightmare.
There are 3 parts in any analysis project
To understand these worst practices in analysis world, first let’s break analysis projects in to 3 parts.
- Data Structure
- Tools & Construction
Let’s deep dive in to each area of the analysis projects to see what can go wrong.Continue »
A while back I developed a solution to a Chandoo.org Forum question, where the user wanted a 4 level doughnut chart where each doughnut was made up of 12 segments and each segment was to be colored based on a value within a range. If the values changed he wanted the chart to update, Conditional Formating like:
This post looks at how this was achieved.
Around 2 months back, I asked you to visualize multiple variable data for 4 companies using Excel. 30 of you responded to the challenge with several interesting and awesome charts, dashboards and reports to visualize the financial metric data. Today, let’s take a look at the contest entries and learn from them.
First a quick note:
I am really sorry for the delay in compiling the results for this contest. Originally I planned to announce them during last week of July. But my move to New Zealand disrupted the workflow. I know the contestants have poured in a lot of time & effort in creating these fabulous workbook and it is unfair on my part. I am sorry and I will manage future contests better.Continue »
So here is a news from strange but true department. Microsoft Excel blamed for gene study errors [bbc.com].
Microsoft’s Excel has been blamed for errors in academic papers on genomics.
Researchers trying to raise awareness of the issue claim that the spreadsheet software automatically converts the names of certain genes into dates.
Gene symbols like SEPT2 (Septin 2) were found to be altered to “September 2”.
This is what happens when you spend countless hours learning genome sequencing and very little about the software tools where your data goes. May be we need clippy back to warn people about such sticky situations.Continue »
Over the weekend, I got an email from Mr. E, one of my students. Mr. E works at a police department in California and as part of his work, he was looking at calls received by police. Whenever police get a call for help, multiple teams can respond to the call and go to the location. All of these dispatches are recorded. So a single call can have several such dispatches. And Mr. E wanted to findout which team responded the first. The problem?
Finding the first responded team is tricky.
Today let’s take up this problem as a case study and understand various methods to solve it. We are going to learn about writing better lookups, pivot tables, power pivot and optimization. Put on your helmets, cause this is going to be mind blowingly awesome.Continue »
At Chandoo.org, we are big believers of keyboard shortcuts. There are several posts (1,2,3,4, more and even more) discussing useful Excel shortcuts. Today I want to introduce a new kind of keyboard shortcuts. One hand shortcuts.
One hand shortcuts – Half the work, double the fun
The idea is simple. When you can use only one hand to complete the shortcut key presses, it is called as a one hand shortcut.Continue »