Jay B. Martin jbmartin
jbmartin
/ SortByLetterColumn.R
Last active
August 29, 2015 14:02
Sort data frame by letter column. Handles multiple letter cases A, B, ..., AA, ..., AAA,.... as commonly found in Excel spreadsheets.
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| SortByLetterColumn <- function(df, column_to_sort_by) { | |
| # Sorts a data frame by a column containing letters. E.g., A, B, C, ..., AA, BB,... | |
| # | |
| # Args: | |
| # df: data frame to be sorted | |
| # column_to_sort_by: (str) column to sort df by | |
| # | |
| # Returns: | |
| # Data frame sorted by specified column. | |
| sorted <- df[order(nchar(df[,column_to_sort_by]), df[,column_to_sort_by]), ] |
jbmartin
/ import_svg.js
Last active
December 21, 2015 07:48
This gist provides an API that wraps and extends d3's svg/xml import methods. This API aims to avoid callback nesting by wrapping D3's async xml calls in promises (see jQuery 1.8+ docs). This approach allows users to ignore common async issues because promises are resolved internally. In sum, this is really just syntactic sugar for d3's [xhr obj…
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| // Requires d3 3.2+ and jQuery 1.8+ | |
| // CONTRACT | |
| // void -> SVG | |
| // | |
| // PURPOSE | |
| // This API both abstracts and extends d3's svg/xml import methods. The goal is to avoid | |
| // callback nesting by wrapping d3's async xml calls in a promise, and | |
| // then resolving them internally (see jQuery 1.8+ AJAX specs). All | |
| // methods return `this` to allow for method cascading. |