使用R读取GTFS实时文件? [英] Reading GTFS-realtime files using R?

问题描述

我想使用R分析GTFS实时文件，与静态GTFS相比，这些文件是经过编译的，读取起来比较棘手.

I want to analyze GTFS-realtime files using R, compared to the static GTFS, these files are compiled and reading them is trickier.

谷歌搜索，我只发现该软件包可以处理GTFS https://github.com/ropenscilabs/gtfsr

Googling around, I have only found this package to deal with GTFS https://github.com/ropenscilabs/gtfsr

但同样，这仅适用于静态GTFS.

But again, this is just for static GTFS.

您是否知道可以实时处理GTFS的cran/github R软件包?

Are you aware of a cran/github R package that deals with GTFS-realtime?

另一种解决方案是将GTFS-RT转换为更具可读性的格式，例如json 将gtfs实时数据流化为人类可读格式

An alternative solution would be to convert the GTFS-RT into a more readable format like json streaming gtfs real time data into human readable format

推荐答案

我注意到您已经找到了进入我的开发包gtfsway .特别是，问题1 中的示例提供了该程序包如何工作的示例以及解析实时供稿的方式

I notice you already found your way over to my development package, gtfsway. In particular, the example in issue 1 gives an example of how the package works and the way it parses a realtime feed

devtools::install_github("SymbolixAU/gtfsway")
library(gtfsway)
url <- "https://gtfsrt.api.translink.com.au/Feed/SEQ"

response <- httr::GET(url)

FeedMessage <- gtfs_realtime(response)

## the function gtfs_tripUpdates() extracts the 'trip_update' feed
lst <- gtfs_tripUpdates(FeedMessage)  

## The results will obviously change depending on when you read the data
lst[[32]]
# $dt_trip_info
# trip_id start_time start_date route_id
# 1: 8959814-SBL 16_17-SBL_FUL-Friday-04   12:21:00   20170303  709-739
# 
# $dt_stop_time_update
#     stop_sequence stop_id arrival_time arrival_delay departure_time departure_delay
#  1:             1  318944   1488504104         -3556     1488507660               0
#  2:             2  318946   1488507741            21     1488507741              21
#  3:             3  300444   1488507903             3     1488507903               3
#  4:             4  300058   1488507977            17     1488507977              17
#  5:             5  300059   1488508022             2     1488508022               2
#  6:             6  300060   1488508094           -46     1488508094             -46
#  7:             7  300061   1488508115           -25     1488508115             -25
#  8:             8  300062   1488508148           -52     1488508148             -52
#  9:             9  300063   1488508175           -85     1488508175             -85
# 10:            10  300005   1488508299          -141     1488508299            -141
# 11:            11  300053   1488508398          -102     1488508398            -102
# 12:            12  300054   1488508458          -102     1488508458            -102
# 13:            13  300056   1488508638          -102     1488508638            -102
# 14:            14  300055   1488508758          -102     1488508758            -102
# 15:            15  300272   1488508998          -102     1488508998            -102
# 16:            16  319160   1488509058          -102     1488509058            -102

我愿意接受捐款&包装上的建议(如果有).

I'm open to contributions & suggestions on the package if you have any.

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