Recreating Tufte’s famous weather chart with Google Sheets and Charts API

My Twitter feed is mostly populated with data-related resources and people, so I almost always find something new and shiny going on there to distract me.

Sometimes this can be a good thing though (and sometimes, it can be the best thing ever).

Take last Friday. I found myself procrastinating, browsing my home feed when I saw this tweet for the upcoming Microsoft Data Science summit:

Tufte temp chart tweet

What caught my eye was not the actual tweet, but the sumptuous weather visualization that I recognized as one of Edward Tufte’s famous creations.

I clicked through to the article, which linked to Tufte’s original chart (here) and a fantastic tutorial about re-creating the chart using R, from Brad Boehmke (which is actually the chart shown in the tweet above).

It looks at daily average temperature over a period of time and captures the historic min/max range, the normal range (95% confidence interval), the 2014 temperature line and picks out the highs and lows. It renders all of this information in a single, beautiful column/line combination chart.

Curiousity piqued, I wondered whether this would be possible with Google Sheets?

The short answer is….. Continue reading Recreating Tufte’s famous weather chart with Google Sheets and Charts API

Build time-based triggers in Apps Script projects to automate programs

Ever find yourself needing to repeat an action in your Google Sheets?

For example, on a recent client project I wanted to cycle through my spreadsheet data, compare it to another dataset and apply a matching algorithm. To do this and stay within the 6 minute execution limit for Apps Script, I split my data into “blocks” of 10 rows, counted how many blocks I had and then ran the matching algorithm once for each block until they’d all been processed.

By adding time-based triggers, I setup my Google sheet to do this automatically, rather than having me click a button each time.

Using Apps Script (read my getting started guide here), you can add these time-based triggers programmatically, so they can run and stop automatically.

In this post I’m going to show a skeleton example of this time-based architecture, to which you can add your own functionality.

The entire code file is here on GitHub and the spreadsheet is available here (feel free to make a copy: File > Make a copy… and then you can open the script editor to modify the code).

Time-based triggers with Google Apps Script

In this simple example, I’m going to output a random number in a new line of my spreadsheet every minute until I’ve looped through a set number of times (2 in this case). It’s deliberately basic as the focus is on the trigger/timing architecture.

Here’s a screencast of this simple program in action (speeded up):

Auto trigger loop

Behind the scenes, everything is running on autopilot once I’ve clicked that first Run button.

Continue reading Build time-based triggers in Apps Script projects to automate programs

Friday reading: resources and inspiration for spreadsheet buffs

Here’s a collection of resources for you: a strange mix of advanced, esoteric and inspirational spreadsheet uses, showing how far some (mad)men and women push their spreadsheets. The list gets more light-hearted towards the bottom of the post!

Somehow I doubt Dan Bricklin would have envisioned all this when he invented the spreadsheet…

Spreadsheet programming

Functional programming in Excel from Felienne Hermans all about her research into treating Excel as programming language. Well worth a watch.

Continue reading Friday reading: resources and inspiration for spreadsheet buffs