I started playing with OpenCPU a couple of weeks back and am getting hooked to it. I was able to succesfully install the "knitr" and "opencpu.demo" apps. The issue I am running into is when I try to invoke the R functions I packaged under a new r package and call it from within knitr-app. I get a message saying no such package exists. I ran installed.packages(lib.loc="/usr/lib/R/library") from an R shell and from knitr-app interface and indeed my packages shows up in the former but not in the latter case. No idea whats going on here ! Will greatly appreciate if anyone can answer this.
omments:
when i run find.package("DummyPkg") through the /R/pub/base/identity/json API , I do get back
[
"/usr/lib/R/library/DummyPkg"
]
However the same query from within knitr-app webpage returns:
# write R code here
find.package("DummyPkg")
## Error: there is no package called 'DummyPkg'
The default html page for knitr app has links to opencpu.org server, so the POST was going to public server instead of going to my server, no wonder my packages weren't showing up !
Comments:
when i run find.package("DummyPkg") through the /R/pub/base/identity/json API , I do get back
[
"/usr/lib/R/library/DummyPkg"
]
However the same query from within knitr-app webpage returns:
Related
Guys, I'm having problems deploying my streamlit application, I include the RCurl package in the packages.txt list, however the deploy is interrupted with the following message:
unable to locate package RCurl
Another interesting thing:
The first time I deployed, RCurl was not included, and my application ran normally.
However when I performed a second deployment of the same application, when executing a function dependent on this package it returned "there is no package called RCurl"
Importantly, this same function was performed on the first deploy.
From then on I tried both ways:
listing the RCurl in packages.txt, and
not listing RCurl in packages.txt
in the first form the deploy is completed but when executing the function the following message is returned "there is no package called RCurl"
and when trying the second way the deploy is interrupted with the following message: 'Unable to locate package RCurl'
Can anyone give me a hint of a possible solution?
Thanks!
I wanted to make internally sharing/locally launching a shiny app developed with the {golem} framework a little more robust.
Hence, I used the renv package and installed the shiny app as a local package into a project folder.
I proceeded as follows (thanks #Kat for the suggestion):
initialize renv using renv::init(bare = TRUE)
renv::install("my_local_package")
renv::snapshot(type = "all")
renv::isolate()
Writing a launch file consisting of:
library(golempackage)
renv::restore()
golempackage::run_app(options = list(launch.browser = TRUE))
Share folder.
However, when launching the shiny app on a different computer (or a docker testing environment), I get the following error caused by the package bslib. Same happens when I delete my cache:
An error has occurred!
File attachments must exist: 'C:/Users/XYZ/AppData/Local/R/cache/R/renv/cache/v5/.../bslib/lib/bs3/assets/fonts'
Note: this error even occurs if I set the cache to be project-local and share it inside the project folder.
However, now the error message does not reference the global but the project-local cache. Unfortunately still as an absolute path which throws an error for other users.
This is all super weird and I have not the slightest idea why this occurs.
I would like to avoid removing bslib.
As far as I can see, the error is coming from the sass package, e.g.
https://github.com/rstudio/sass/blob/f7a954027447dd0b9826ec01c7084c89a6e64fcc/R/layers.R#L442-L443
While I don't know exactly know what's going on, you could probably use the R debugger to check why that's failing. (Does the referenced folder exist in both cases? Are you expecting renv to be using the cache in the second case?)
I keep getting the following error on app.powerbi.com:
"Error in pivot_wider(data, names_from=names,values_from=values): could not find function "pivot_wider""
I load the 'tidyr' package as a required library.
I get the same error when using "spread" instead of pivot_wider.
When I specify the function using:
tidyr::pivot_wider(data, names_from=names, values_from=values)
I get a different error:
"Error in loadNamespace(name): there is no package called 'tidyr'".
PowerBI Desktop everything works perfectly fine. It's only on the published PowerBI report that I get the error.
What can I do to resolve this issue?
Alternative library / function to 'pivot_wider' or 'spread'?
I was able to verify using print statements that the report on powerbi.com was not able to access the r packages that were installed.
I was using a .libPaths()[3] to point to the location where my libraries were installed, but this didn't work in powerbi.com.
I ended up re-installing R to a location where I could install packages to, since admin rights are necessary to write to the C:/users/program files location.
I have the API credentials in one separate R script to keep it out of Git. I want to run this script in the beginning of the scripts that actually interact with the different servers. I have successfully used the same strategy for all my global functions.
setwd("G:/script")
source("API_credentials.R") # gives always an error
# > source("API_credentials.R")
# Error: '\s' is an unrecognized escape in character string starting ""g:\s"
source("ProVeg_functions.R") # runs fine
Problem:
Why does the first source() not work, while the second one does? The error message does not make any sense to me.
Solutions tried:
I have tried different escape chars \.
I have tried writing full path & file names.
I have tried putting the file name in as a variable, which gets its
content from a dir() search, to make sure that the file exists and
the name is correctly written.
Order of source() does not change situation.
Isolating the piece of code with error, and restarting R.
upgraded all my packages and R to version 4.0.2.
The API_credentials.r script works fine when run on its own. the Sys.setenv() works fine and I can read the API keys with Sys.getenv().
I am not sure if it is related to my problem, but if I do usethis::edit_r_environ() I can not see my API keys.
Setup
Windows 10, R-Studio 1.3.1093, R version 4.0.2 (2020-06-22)
I mistakenly assumed that the error message was related to the script calling the API_credentials.R, but it actually was an error message indicating an error in the API_credentials.R script. Fixed a typo and all is good.
I would like to build a simple webserver using Rook, however I am having strange errors when trying it in R-Studio:
The code
library(Rook)
s <- Rhttpd$new()
s$start()
print(s)
returns the rather useless error
"Error in listenPort > 0 :
comparison (6) is possible only for atomic and list types".
When trying the same code in a simple R-Console,everything works - so I would like to understand why that happens and how I can fix it.
RStudio is Version 0.99.484 and R is R 3.2.2
I've experienced same thing.
TLDR: This pull request solves the problem: https://github.com/jeffreyhorner/Rook/pull/31
RStudio is treated in different way and Rook port is same as tools:::httpdPort value. The problem is that in current Rook master tools:::httpdPort is assigned directly. It's a function that's why we need to evaluate it first.
If you want to have it solved right now, without waiting for merge into master: install devtools and load package from my fork #github.
install.packages("devtools")
library(devtools)
install_github("filipstachura/Rook")