## Excel Spillable Ranges are Great!

I use Python or R for my large-scale data work, but I do find Excel a very powerful ad hoc data analysis tool, particularly with some of the new functions that use spillable ranges. Today, I was given a large table of Engineering Change Orders (ECOs) and a comma-separated list of the documents each ECO affected (very abbreviated form shown in Figure 1). Continue reading

## Effect of Lumber Price Rise on House Cost

Quote of the Day Great things are not done by impulse, but by a series of small things brought together. — Vincent van Gogh Introduction I recently went into a home center and was shocked to see a 2‑in x … Continue reading

Posted in Construction | 4 Comments

## Our House Design Process

A number of people have asked questions about the process we used to design and build our cabin in northern Minnesota (Figure 1), a build that I have discussed in other posts (link, link). The questions center on the tools we used, what the build process was like, and things to watch for. The following post examines our design and build process from the standpoint of what went well and not so well. Continue reading

## Ben Franklin and the Gulf Stream

One of my favorite Youtube channels is Wind Hippie Sailing. The Wind Hippie is a free spirit who does not worry about little details like currents and wind – this is the charm of her channel.  While sailing from North Carolina to Puerto Rico, she soon learned the power of the Gulf Stream when she discovered that she was making very slow (maybe negative) progress. Fortunately, she was able to get out of that situation. I was worried she might end up somewhere dangerous, like a reef. Continue reading

## US Daylight Saving Time Date Calculation in Excel

I recently had a situation where I needed to correct a number of date/time values because they did not take into account Daylight Saving Time (DST). To be specific, some transactions from China were recorded assuming a fixed time offset with respect to US Central Standard Time. Because of DST, this is not always the case. My customer only works in Excel, so the work was done in Excel. Continue reading

Posted in Excel | 6 Comments

## Taffy 3 Total Displacement vs Yamato Using R

I was watching a documentary on the Battle Off Samar on my favorite Youtube naval channel called Drachinifel. During this show, Drachinifel stated that the battleship Yamato displaced more tonnage than the entire Task Group 77.4.3 (call sign Taffy 3) defense force. I found this a remarkable statement and one that I could verify using a little bit of web scraping. Because one of the students I tutor use R, I thought this would be a good exercise to implement using R and Rmarkdown (a great report generation tool). Continue reading

## US Battleship Fuel Usage

In this post, I will examine the fuel consumption of the three most modern battleship classes that the US deployed during WW2: South Dakota, North Carolina, and Iowa classes. The data is scraped from the Hyperwar website, which is one of my favorite targets for data extraction. In this case, the Hyperwar page contains a set of tables from the US Navy document FTP 218: War Service Fuel Consumption of US Navy Surface Vessels. Continue reading

## 50 Destroyer Pre-War Base Deal

This post is going to look at the Destroyers for Bases deal between the US and UK. The bargain was an executive agreement announced on 2-Sep-1940 to trade 50 WW1-era US destroyers to the UK for US basing rights in the Caribbean, Bermuda, and Newfoundland. I have seen the destroyers described as obsolete, which seemed odd for ~20-year-old destroyers that nominally have 30 year lifetime (typical for most US Navy ships). Continue reading

## BB Ballistic Coefficients

A number of years ago, I was asked by a father to assist him and his son with a science project that involved calculating the ballistic coefficient of a BB gun projectile. I provide dthis father-son duo with the required calculations (documented here) and the answer I obtained seemed reasonable. Continue reading