G Data Frame Properties
A database of the collection is maintained in a single file of comma-separated variables which can be read in by any number of editors or computer programs. The programming language R (R Core Team 2021) is used to query and manipulate the data from this file and to generate all the tables for this site. The site itself is generated through the use of the bookdown package in R (Xie 2016) and is processed through the user interface Rstudio (RStudio 2019).
The data file is read into R to create a “data frame”; a summary of its present properties is produced below.
## Maker Model circa Year
## Length:364 Length:364 Length:364 Length:364
## Class :character Class :character Class :character Class :character
## Mode :character Mode :character Mode :character Mode :character
##
##
##
## Serial Type Style1 Style2
## Length:364 Length:364 Length:364 Length:364
## Class :character Class :character Class :character Class :character
## Mode :character Mode :character Mode :character Mode :character
##
##
##
## L0 L Lx Mat
## Min. : 2.0 Min. : 2.00 Min. : 2.000 Length:364
## 1st Qu.: 9.0 1st Qu.: 10.00 1st Qu.: 8.000 Class :character
## Median : 10.0 Median : 10.00 Median :10.000 Mode :character
## Mean : 13.7 Mean : 14.18 Mean : 9.618
## 3rd Qu.: 10.0 3rd Qu.: 10.00 3rd Qu.:10.000
## Max. :500.0 Max. :500.00 Max. :48.000
## Case ScFr ScBk Country
## Length:364 Length:364 Length:364 Length:364
## Class :character Class :character Class :character Class :character
## Mode :character Mode :character Mode :character Mode :character
##
##
##
## Notes References imFile AcqDate
## Length:364 Length:364 Length:364 Min. :19720901
## Class :character Class :character Class :character 1st Qu.:20200289
## Mode :character Mode :character Mode :character Median :20210305
## Mean :20196558
## 3rd Qu.:20221008
## Max. :20241004
## AccNum DataLink ModLnkNew PicL
## Length:364 Length:364 Length:364 Length:364
## Class :character Class :character Class :character Class :character
## Mode :character Mode :character Mode :character Mode :character
##
##
## Levels of variable Type: C, H, L, S
Levels of variable Style1: A, B, E, P
Levels of variable Style2: a, at, b, blptx, bp, c, e, g, k, l, ld, lo, lptvx, lptx, lt, ltvx, ltx, ltxb, lvx, lx, m, mb, mt, o, p, pb, pd, pex, ph, phx, pt, px, q, qx, r, rp, s, sp, spw, sw, t, vld, w
Levels of variable Mat: Al, bb, iv, Mg, pl, pp, ss, wd
Levels of variable L0: 2, 3.75, 4, 5, 5.5, 6.3, 6.5, 7, 7.5, 8, 9, 10, 10.25, 11, 12, 15, 16, 17, 20, 22, 24, 26, 27, 30, 31, 40, 50, 60, 66, 360, 468, 500
Levels of variable Country: CHN, DEN, EGER, FRA, GER, JPN, UK, USA, USSR
Other informational components will be added as time permits, such as better references to established Oughtred Society articles, more complete sets of pictures of the rules, whether instructions are included with the rule, etc.
For more information about creating a web site of this sort using Rstudio and the bookdown package a Bookdown Example is provided to give one a head-start.