The following document, copied below, is a quick guide to using RStudio as the tool to querying the APPROACH Online Reporting platform
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| name | Approach_Rstudio Quick Guide_20201210.01.pdf |
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One needs to access the AHS network first using the private secure network access. Connect to the AHS VPN network using your credentials. If you do not have any, contact the IT support of AHS to request access. To work in RStudio on the Approach Online reporting, requirements are: · An APPROACH Online Reporting account · An APPROACH Online RStudio account · VPN /AHS network access |
Step 1. Connect to AHS VPN
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a. Install the Query Utility R Package for APPROACH. This package is not public, and only available on the RStudio server. To install, run the following command in the console
install.packages("/home/cru/approach_0.1.1.tar.gz", source = TRUE, repos = NULL)
If successful, the console should return the following
Installing package into ‘/home/dahul/R/x86_64-pc-linux-gnu-library/3.6’
(as ‘lib’ is unspecified)
*installing *source* package ‘approach’ ...
** using staged installation
** R
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
** building package indices
** testing if installed package can be loaded from temporary location
** testing if installed package can be loaded from final location
** testing if installed package keeps a record of temporary installation path
*DONE (approach)
b. Import the installed APPROACH library, running the following command in console
library(approach)
c. Create an ApproachAPI instance/object as follows
api = ApproachAPI()
This api variable will be used to authenticate yourself, and send PostgreSQL queries to the database
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a. Logging In
Before submitting a query, the API must authenticate all subsequent requests. Authenticate yourself first using the ApproachAPI $login() function as below
api$login()
You will be prompted for your APPROACH reporting platform credentials.
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See here: https://test-front.approach.org/model-explorer (must be logged in)
e.g.,
api$query("SELECT count(*) as c, bmi FROM approach.patient WHERE bmi IS NOT NULL and bmi > 0 GROUP BY bmi ORDER BY c DESC;")
The query function will render the query’s results into a table
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c. Logging Out
To close off your session with the API, run the $logout function as below
api$logout()
A confirmation message will be displayed once logged out
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