I am trying to create a shiny App that offers users a choice of canned reports from a database that renders reactively, and then offers users the option to download a pdf of their desired report. I am running into trouble getting knitr to discover pdflatex to make the pdf. I originally tried using MikTex, but on advice of other posts removed MikTex and instead used tinytex. I followed the guidance here: https://yihui.org/tinytex/r/#debugging. The shiny app works fine, but when I click the download button, R initially starts the process of compiling, but once I click save when the dialog button launches, R throws this error (I include the verbose output as suggested by Yuhui Xie - the tinytex package author):
processing file: Reports.Rmd
|.................. | 25%
ordinary text without R code
|.................................... | 50%
label: unnamed-chunk-1
|...................................................... | 75%
ordinary text without R code
|........................................................................| 100%
label: unnamed-chunk-2
output file: Reports.knit.md
"C:/Program Files/RStudio/bin/pandoc/pandoc" +RTS -K512m -RTS Reports.utf8.md --to latex --from markdown+autolink_bare_uris+tex_math_single_backslash --output pandoc5ac42d2964ee.tex --lua-filter "C:\Users\SCMCKENZIE\Documents\R\win-library\4.0\rmarkdown\rmarkdown\lua\pagebreak.lua" --lua-filter "C:\Users\SCMCKENZIE\Documents\R\win-library\4.0\rmarkdown\rmarkdown\lua\latex-div.lua" --self-contained --highlight-style tango --pdf-engine xelatex --variable graphics --variable "geometry:margin=1in"
Warning: Error in : LaTeX failed to compile C:\Users\SCMCKE~1\AppData\Local\Temp\Rtmp0a6jRk\file5ac45df413ce.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips.
[No stack trace available]
Here is my SessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19041)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] plyr_1.8.6 rmarkdown_2.6 knitr_1.29
[4] tmap_3.3 rgeos_0.5-3 sp_1.4-1
[7] sf_0.9-7 xtable_1.8-4 readr_1.4.0
[10] shinydashboard_0.7.1 odbc_1.2.3 DBI_1.1.0
[13] shiny_1.5.0
loaded via a namespace (and not attached):
[1] Rcpp_1.0.5 lattice_0.20-41 png_0.1-7 class_7.3-17
[5] digest_0.6.25 mime_0.9 R6_2.4.1 evaluate_0.14
[9] e1071_1.7-3 pillar_1.4.6 rlang_0.4.7 rstudioapi_0.11
[13] raster_3.3-13 blob_1.2.1 stringr_1.4.0 htmlwidgets_1.5.1
[17] bit_1.1-15.2 tinytex_0.29 compiler_4.0.2 httpuv_1.5.4
[21] xfun_0.20 pkgconfig_2.0.3 tmaptools_3.1-1 base64enc_0.1-3
[25] htmltools_0.5.0 tidyselect_1.1.0 tibble_3.0.3 codetools_0.2-16
[29] XML_3.99-0.4 viridisLite_0.3.0 crayon_1.3.4 dplyr_1.0.0
[33] later_1.1.0.1 grid_4.0.2 jsonlite_1.7.0 lwgeom_0.2-5
[37] lifecycle_0.2.0 magrittr_1.5 units_0.6-7 KernSmooth_2.23-17
[41] stringi_1.4.6 promises_1.1.1 leafsync_0.1.0 leaflet_2.0.4.1
[45] ellipsis_0.3.1 generics_0.0.2 vctrs_0.3.2 RColorBrewer_1.1-2
[49] tools_4.0.2 dichromat_2.0-0 bit64_0.9-7 leafem_0.1.3
[53] glue_1.4.1 purrr_0.3.4 hms_0.5.3 crosstalk_1.1.0.1
[57] abind_1.4-5 parallel_4.0.2 fastmap_1.0.1 yaml_2.2.1
[61] stars_0.5-1 classInt_0.4-3
I have ensured that I have selected my Global Options in RStudio to use knitr and pdflatex. Sys.which('pdflatex') gives me:
pdflatex
"C:\\Users\\SCMCKE~1\\AppData\\Roaming\\TinyTeX\\bin\\win32\\pdflatex.exe"
And tinytex::tlmgr_conf() gives me:
tlmgr conf
=========================== version information ==========================
tlmgr revision 57424 (2021-01-15 03:30:58 +0100)
tlmgr using installation: C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX
TeX Live (https://tug.org/texlive) version 2020
==================== executables found by searching PATH =================
PATH: C:\Users\SCMCKE~1\AppData\Roaming\TinyTeX\tlpkg\tlperl\bin;C:\Users\SCMCKE~1\AppData\Roaming\TinyTeX\bin\win32;C:\rtools40\usr\bin;C:\Program Files\R\R-4.0.3\bin\x64;C:\Program Files\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files\Microsoft MPI\Bin\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86)\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\Tools\Binn\;C:\Program Files\Microsoft SQL Server\150\DTS\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Users\SCMCKENZIE\AppData\Roaming\TinyTeX\bin\win32;C:\Users\SCMCKENZIE\AppData\Local\Microsoft\WindowsApps;C:\Users\SCMCKENZIE\AppData\Local\Programs\MiKTeX\miktex\bin\x64
dvipdfmx: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/dvipdfmx.EXE
dvips: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/dvips.EXE
fmtutil: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/fmtutil.EXE
kpsewhich: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/kpsewhich.EXE
luatex: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/luatex.EXE
mktexpk: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/mktexpk.EXE
pdftex: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/pdftex.EXE
tex: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/tex.EXE
tlmgr: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/tlmgr.BAT
updmap: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/updmap.EXE
xetex: C:/Users/SCMCKE~1/AppData/Roaming/TinyTeX/bin/win32/xetex.EXE
=========================== active config files ==========================
config.ps: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist/dvips/config/config.ps
fmtutil.cnf: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist/web2c/fmtutil.cnf
mktex.cnf: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist/web2c/mktex.cnf
pdftexconfig.tex: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist/tex/generic/tex-ini-files/pdftexconfig.tex
texmf.cnf: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf.cnf
texmf.cnf: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist/web2c/texmf.cnf
updmap.cfg: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist/web2c/updmap.cfg
============================= font map files =============================
kanjix.map: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var/fonts/map/dvipdfmx/updmap/kanjix.map
pdftex.map: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var/fonts/map/pdftex/updmap/pdftex.map
ps2pk.map: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var/fonts/map/dvips/updmap/ps2pk.map
psfonts.map: c:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var/fonts/map/dvips/updmap/psfonts.map
=========================== kpathsea variables ===========================
ENCFONTS=.;{C:/PROGRA~1/R/R-40~1.2/share/texmf,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}/fonts/enc//
SYSTEXMF=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var;C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local;C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist
TEXCONFIG={C:/PROGRA~1/R/R-40~1.2/share/texmf,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}/dvips//
TEXFONTMAPS=.;{C:/PROGRA~1/R/R-40~1.2/share/texmf,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}/fonts/map/{kpsewhich,pdftex,dvips,}//
TEXMF={C:/PROGRA~1/R/R-40~1.2/share/texmf,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}
TEXMFCONFIG=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config
TEXMFDBS={!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}
TEXMFDIST=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist
TEXMFHOME=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local
TEXMFLOCAL=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local
TEXMFMAIN=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist
TEXMFSYSCONFIG=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config
TEXMFSYSVAR=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var
TEXMFVAR=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var
TEXPSHEADERS=.;{C:/PROGRA~1/R/R-40~1.2/share/texmf,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}/{dvips,fonts/{enc,type1,type42,type3}}//
VARTEXFONTS=C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var/fonts
WEB2C={C:/PROGRA~1/R/R-40~1.2/share/texmf,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-local,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-config,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-var,!!C:/Users/SCMCKENZIE/AppData/Roaming/TinyTeX/texmf-dist}/web2c
==== kpathsea variables from environment only (ok if no output here) ====
In case it is a matter of my coding, below is a reproducible R script:
##Loading Necessary Packages
library(shiny)
library(shinydashboard)
library(rmarkdown)
library(knitr)
library(plyr)
##Getting data for reproducibility
data("iris")
data("airquality")
names(airquality)[5]<-"Species"#To allow for using the same plyr code in server function on both data sets
####Creating Shiny App####
##User Interface
ui<-dashboardPage(
dashboardHeader(title="FAKE SHINY APPLICATION"),
dashboardSidebar(
sidebarMenu(tabName="REPORTS",
menuItem("OPTIONS", tabName = "SOME MENU OPTIONS",
radioButtons(inputId = "REPORT", label = "Select Something", choices = c("Iris", "AQ")),
downloadButton(outputId = "DWNLD", "Download Report")
)
)
),
dashboardBody(
tableOutput(outputId = "TABLE"),
plotOutput(outputId = "PLOT")
)
)
##Server Function##
server<-function(input, output){
##Reactive Plot##
output$PLOT<-renderPlot({
RPT<-list(Iris = iris, AQ = airquality)
DF<-RPT[[input$REPORT]]
pairs(DF[,c(1:4)])})
##Reactive Table##
output$TABLE<-renderTable({
RPT<-list(Iris = iris, AQ = airquality)
DF<-RPT[[input$REPORT]]
rpt_tbl<-ddply(DF, "Species", colwise(mean))
xtable(rpt_tbl)
})
##Download As PDF##
output$DWNLD<-downloadHandler(
filename=paste(input$REPORT, "pdf", sep="."),
content<-function(file){
RPT<-list(iris, airquality)
names(RPT)<-c("Iris", "AQ")
tmp<-file.path(tempdir(), "Reports.Rmd")
file.copy(paste(getwd(),"Reports.Rmd", sep="/"), tmp, overwrite=TRUE)
params<-list(DF
rmarkdown::render(tmp, output_file = file,
params = params,
envir = new.env(parent = globalenv()
))#End render
}
)
}
##Launch Shiny App##
shinyApp(ui=ui, server = server)
And here is the script for the Rmarkdown document saved as Reports.Rmd:
---
title: "FAKE REPORT"
output: pdf_document
params:
DF: NA
---
Fake Report Output
```{R}
rpt_tbl<-ddply(params$DF, "Species", colwise(mean))
xtable(rpt_tbl)
```
More Fake Output
```{R}
pairs(params$DF[,c(1:4)])
```
I have scoured Stack Overflow and RStudio answers, but haven't found any that seem to be my problem. Part of me is wondering if this is a platform issue. Any help would be much appreciated. Thanks so much.
Take Care,
-Sean
After much searching and testing, I found out that the problem was not with tinytex or pdflatex, but rather my call to rmarkdown::render() That led me to this answer on GitHub https://github.com/rstudio/shiny/issues/1831. Apparently, when rmarkdown::render() is called within downloadHandler(), you should NOT specify the output_file argument in render() Instead you need to rename the file AFTER rendering.
Here is the correct code (simply replace the call to downloadHandler() in the script from my original question.
output$DWNLD<-downloadHandler(
filename=paste0(input$REPORT, ".pdf"),
content<-function(file){
RPT<-list(iris, airquality)
names(RPT)<-c("Iris", "AQ")
tmp <- file.path(tempdir(), "Reports.Rmd", fsep="\\")
file.copy("F:/Apps/DNR_TRIS/Shiny_report_scripts/SQL_SCRIPTS/Reports.Rmd", tmp, overwrite = TRUE)
out<-RPT[[input$REPORT]]
params<-list(out)
names(params)<-"DF"
out<-rmarkdown::render(tmp,
params = params,
envir = new.env(parent = globalenv()
))#End render
file.rename(out, file)
}
)
In my toy package, I have defined %+% operator as an alias to paste0(). Trying to reduce interference with other packages, I realized it the following way:
`%+%` <- function(...) UseMethod("%+%")
`%+%.character` <- paste0
`%+%.numeric` <- paste0
`%+%.default` <- function (arg1, arg2){
e <- parent.env(getEnvByName(.GlobalEnv,'package:mypackagename'));
if (exists('%+%', envir = e)) get('%+%',envir = e)(arg1,arg2);
}
i.e. I override it only for character and numeric arguments, otherwise it tries to find if the method was previously defined.
It was working just fine until recently when it started giving an error:
'a' %+% 'b'
# Error in UseMethod("%+%") :
# no applicable method for '%+%' applied to an object of class "character"
It only fails when called outside of the package. If I define a function within the package, it works correctly:
# testab2() is defined in R file as a part of the package:
testab2 <- function(inpA, inpB){
print (inpA %+% inpB)
}
# when called outside of the package:
testab2('a','b')
# ab
I am pretty sure I didn't change anything in my code, so I'm wondering if it could be caused by R update. What could have changed and how to make it work back?
P.S. getEnvByName() is my helper function that searches for an object in parent environments:
getEnvByName <- function(inpEnv=.GlobalEnv, lookFor){
e <- inpEnv;
while (environmentName(e) != 'R_EmptyEnv' & environmentName(e)!=lookFor) e <- parent.env(e);
if (environmentName(e) != lookFor) return(NULL);
return(e);
}
And the exporting was done by the following lines in the NAMESPACE file:
exportPattern("^[[:alpha:]]+")
exportPattern("%.*%")
export("%+%.default")
export("%+%.character")
P.P.S. sessionInfo:
R version 4.0.2 (2020-06-22)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 18363)
Matrix products: default
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C LC_TIME=English_United States.1252
system code page: 1251
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] vautils_0.1.1.105 magrittr_1.5 data.table_1.13.0
loaded via a namespace (and not attached):
[1] dplyr_1.0.2 crayon_1.3.4 grid_4.0.2 R6_2.4.1 lifecycle_0.2.0 gtable_0.3.0
[7] scales_1.1.1 ggplot2_3.3.2 pillar_1.4.6 rlang_0.4.7 rstudioapi_0.11 generics_0.0.2
[13] vctrs_0.3.4 ellipsis_0.3.1 tools_4.0.2 glue_1.4.2 purrr_0.3.4 munsell_0.5.0
[19] compiler_4.0.2 pkgconfig_2.0.3 colorspace_1.4-1 tidyselect_1.1.0 tibble_3.0.3
To export S3 methods, your NAMESPACE file needs to (in your case) contain the following declarations:
export(`%+%`)
S3method(`%+%`, default)
S3method(`%+%`, character)
S3method(`%+%`, numeric)
That is, export the %+% generic, and declare S3 methods for the methods.
Better yet, instead of manually editing the NAMESPACE file use ‘roxygen2’, which generates the correct declarations for you based on the #export documentation tag.
I want my function to implement a dialog with an editable text box using a shiny app.
I.e. calling the function should open a shiny app displaying some text for the user to edit, then press the 'Ok' button to close the app and return the edited text or the 'Cancel' button to close the app and return an empty character vector.
My code runs fine on Windows (Rstudio desktop).
However on Linux (Rstudio Server Pro) the shiny page is displayed but the interface seems to be greyed, the text can be edited but the buttons are not responsive. Why?
--EDIT--
The unresponsiveness problem occurs with Internet Explorer and Microsoft Edge, not Chrome. Although the page in Chrome is greyed too, and opening Chrome's 'Inspect' tool shows 2 errors:
(1) shinyapp.js:83 WebSocket connection to 'wss://XXXXXXXXXXXXXXX/websocket/' failed: Error during WebSocket handshake: net::ERR_CONNECTION_RESET
(2) Uncaught TypeError: Cannot read property 'readyState' of null
at ShinyApp.$sendMsg (shiny.min.js:3)
at ShinyApp.sendInput (shiny.min.js:3)
at InputBatchSender.$sendNow (shiny.min.js:3)
[where XXXXXXXXXXXXXXX stands for my Rstudio Server's URL]
library(shiny)
getMyText <- function(default = "This is my input\n- Anonymous") {
require(stringr)
ui <- fluidPage(
textAreaInput("myTextBox", "Edit text", paste(default, collapse="\n"),
width = "600px", height = "400px"),
actionButton("okBtn", "Ok"),
actionButton("cancelBtn", "Cancel")
)
server <- function(input, output) {
observe({
if(input$cancelBtn > 0){
stopApp(character(0))
}
});
observe({
if(input$okBtn > 0){
stopApp(unlist(str_split(input$myTextBox, "\n")))
}
});
}
return(runApp(list(ui = ui, server = server)))
}
args <- getMyText()
sessionInfo:
sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-redhat-linux-gnu (64-bit)
Running under: Red Hat Enterprise Linux Server 7.4 (Maipo)
Matrix products: default
BLAS/LAPACK: /usr/lib64/R/lib/libRblas.so
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8 LC_COLLATE=en_US.UTF-8 LC_MONETARY=en_US.UTF-8
[6] LC_MESSAGES=en_US.UTF-8 LC_PAPER=en_US.UTF-8 LC_NAME=C LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] stringr_1.3.1 shiny_1.4.0.2
loaded via a namespace (and not attached):
[1] Rcpp_1.0.4 digest_0.6.18 later_1.0.0 mime_0.6 R6_2.4.1 xtable_1.8-3 magrittr_1.5 rlang_0.4.5
[9] stringi_1.1.7 promises_1.1.0 tools_3.5.0 httpuv_1.5.2 yaml_2.2.0 fastmap_1.0.1 compiler_3.5.0 htmltools_0.4.0
>
The greyed out screen to me sounds like your observe block is firing before all inputs are set up. This can be remedied in two ways:
observe({
req(input$cancelBtn)
if (input$cancelBtn > 0) {
stopApp(character(0))
}
})
observeEvent(input$cancelBtn, {
if (input$cancelBtn > 0) {
stopApp(character(0))
}
}, ignoreNULL = TRUE) # which is the default, including it for clarity
FYI: win10, R-3.5.3, shiny-1.4.0
It turns out this problem was due to a server (mis)configuration.
Interestingly, I found out that setting option shiny.host to the IP address of the server (instead of the default 127.0.0.1) enabled interaction with the shiny app, e.g.:
options(shiny.host = '10.1.2.3')
The following code could be used to set this option dynamically on a Linux host, useful in case load balancing gets the user connected to one of several Rstudio servers:
if (Sys.info()["sysname"] == 'Linux') {
hostIP <- system("hostname -I | awk '{print $1}'", intern = TRUE)
options(shiny.host = hostIP)
}
The below Shiny app code below:
library(shiny)
library(DT)
shinyApp(
ui = fluidPage(
fluidRow(
column(12, dataTableOutput('table'))
)
),
server = function(input, output) {
output$table <- DT::renderDataTable(iris)
}
)
triggers the error:
DataTables warning: table id=DataTables_Table_0 - Ajax error. For more information about this error, please see http://datatables.net/tn/7
using the packages:
R version 3.6.2 (2019-12-12)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Catalina 10.15.2, RStudio 1.2.5033
Locale: en_US.UTF-8 / en_US.UTF-8 / en_US.UTF-8 / C / en_US.UTF-8 / en_US.UTF-8
Package version:
assertthat_0.2.1 backports_1.1.5 base64enc_0.1.3 BH_1.72.0.3
cli_2.0.1 colorspace_1.4.1 crayon_1.3.4 crosstalk_1.0.0
digest_0.6.23 DT_0.11.3 ellipsis_0.3.0 fansi_0.4.1
farver_2.0.1 fastmap_1.0.1 ggplot2_3.2.1 glue_1.3.1
graphics_3.6.2 grDevices_3.6.2 grid_3.6.2 gtable_0.3.0
htmltools_0.4.0.9002 htmlwidgets_1.5.1 httpuv_1.5.2 jsonlite_1.6
labeling_0.3 later_1.0.0 lattice_0.20.38 lazyeval_0.2.2
lifecycle_0.1.0 magrittr_1.5 MASS_7.3.51.4 Matrix_1.2.18
methods_3.6.2 mgcv_1.8.31 mime_0.8 munsell_0.5.0
nlme_3.1.142 pillar_1.4.3 pkgconfig_2.0.3 plyr_1.8.5
promises_1.1.0 R6_2.4.1 RColorBrewer_1.1.2 Rcpp_1.0.3
reshape2_1.4.3 rlang_0.4.2 scales_1.1.0 shiny_1.4.0.9001
sourcetools_0.1.7 splines_3.6.2 stats_3.6.2 stringi_1.4.5
stringr_1.4.0 tibble_2.1.3 tools_3.6.2 utf8_1.1.4
utils_3.6.2 vctrs_0.2.1 viridisLite_0.3.0 withr_2.1.2
xtable_1.8.4 yaml_2.2.0 zeallot_0.1.0
with Chrome 79.0.3945. This is using the latest development packages for shiny and DT after the CRAN packages did not seem to work.
Is there a workaround to this problem?
Updating to the GitHub master versions of the two suggested packages (htmlwidgets and jsonlite) seems to have worked as suggested on GitHub: https://github.com/rstudio/DT/issues/758
Use server=False
As in:
output$tbl <- DT::renderDT(iris, server = FALSE)
Source: https://github.com/rstudio/DT/issues/642
I am not able to create a twitter token using create_token from rtweet package:
library (rtweet)
twitter_token <- create_token(app = appname, # as set in Twitter API
consumer_key = key, # as set in Twitter API
consumer_secret = secret) # as set in Twitter API
The output I get is:
Error in init_oauth1.0(self$endpoint, self$app, permission = self$params$permission, :
Forbidden (HTTP 403).
I followed the instructions to setup Twitter API as disclosed in http://rtweet.info/articles/auth.html, and triple checked that the Callback URL was properly set as http://127.0.0.1:1410.
I also tried:
createTokenNoBrowser<- function(appName, consumerKey, consumerSecret,
accessToken, accessTokenSecret) {
app <- httr::oauth_app(appName, consumerKey, consumerSecret)
params <- list(as_header = TRUE)
credentials <- list(oauth_token = accessToken,
oauth_token_secret = accessTokenSecret)
token <- httr::Token1.0$new(endpoint = NULL, params = params,
app = app, credentials = credentials)
return(token)
}
It seems to work, but when I call
rt <- stream_tweets(q = q, file_name = filename,token = twitter_token)
I get: Error: Not a valid access token.
What might be going wrong?
I am currently using R 3.5.0. Thank you.
> sessionInfo()
R version 3.5.0 (2018-04-23)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)
Matrix products: default
locale:
[1] LC_COLLATE=Portuguese_Brazil.1252 LC_CTYPE=Portuguese_Brazil.1252 LC_MONETARY=Portuguese_Brazil.1252
[4] LC_NUMERIC=C LC_TIME=Portuguese_Brazil.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] rtweet_0.6.4
loaded via a namespace (and not attached):
[1] readr_1.1.1 httr_1.3.1 compiler_3.5.0 magrittr_1.5 R6_2.2.2 hms_0.4.2 tools_3.5.0 pillar_1.2.3
[9] curl_3.2 tibble_1.4.2 yaml_2.1.19 Rcpp_0.12.17 jsonlite_1.5 openssl_1.0.1 pkgconfig_2.0.1 rlang_0.2.1
This issue has been fixed in the newest version of rtweet on Github!
I believe create_token() is deprecated in the latest version of rtweet. Instead, you should use rtweet_app() or rtweet_bot().