Charts of the Week [Aug 15]


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Every week, this blog features 5 of the best visualizations from the last week around the web.

Average gas prices in US regions from 1993 plotted in dynamic bar

Flowing data takes a look at the historical gasoline price data and provides us this eye candy.

My friend Jon takes a look at this and recreates it in excel. Read more.[via flowingdata]

Cost of Food around the World

This BBC page provides insights in to changing food price, consumption trends around the world. Scary picture for future generations. [via cool infographics]

Infographic on the Tees, the shirt project

With so many beautiful visualizations, the shirt project is the next natural thing to happen. They spread the story from the charts in a fun way. Go buy one if you like it 🙂

Google Search Insights for search term “excel”

Google has launched search insights which provides excellent detail about various search trends. I have looked up search term excel, and surprisingly India leads the pack with index of 100. Now I know where majority of my audience are 🙂

How the marginal taxes are changing with Obama’s new tax policy

This chart explains how the marginal taxes change with proposed tax structure by Barack Obama. Remember, the key word is marginal (loosely put, since Obama’s tax policies put more money in your pocket, your other taxes will go up) [via marginal revolution]

Click here to see more visualization ideas

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Weighted average formula in excel

Weighted Average in Excel [Formulas]

Learn how to calculate weighted averages in excel using formulas. In this article we will learn what a weighted average is and how to Excel’s SUMPRODUCT formula to calculate weighted average / weighted mean.

What is weighted average?

Wikipedia defines weighted average as, “The weighted mean is similar to an arithmetic mean …, where instead of each of the data points contributing equally to the final average, some data points contribute more than others.”

Calculating weighted averages in excel is not straight forward as there is no built-in formula. But we can use SUMPRODUCT formula to easily calculate them. Read on to find out how.

3 Responses to “Charts of the Week [Aug 15]”

  1. Branden says:

    Nice finds, the gas price one is an eye opener.

    Vegas Sun newspaper has really cool interactive flight delays map, not sure if it classifies as a chart or not. Thought you might like it so here's the link.

  2. Chandoo says:

    @Branden ... thanks for visiting PHD blog... hope you liked my site.

    The Vegas sun infographic pretty, but slightly elaborate to use as it requires lot of data to show the delays. 🙂

  3. Rumah dijual di Purwokerto says:

    Of course, what a splendid website and informative posts, I definitely will bookmark your blog.Have an awsome day!

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