r - Platform-dependent data output -

-

in order aid myself displaying debugging information, decided create following tiny function dynamically switch between displaying data in rstudio's internal data browser , simple character-based output, depending on capabilities of platform, modules being sourced at:

view <- function (...) {   if (.platform$gui == "rstudio")     view(...)   else     print(...) }

this function located, along other utility functions, in module <proj_home>/utils/debug.r. modules need these functions, include via source("../utils/debug.r").

running project's code on amazon ec2 instance's linux console fine. however, running on same virtual machine via rstudio server results in following error message:

error: evaluation nested deeply: infinite recursion / options(expressions=)? error during wrapup: evaluation nested deeply: infinite recursion / options(expressions=)?

it seems me r gets confused view() function needs called. initially, assumed rstudio overloads utils::view() , tried call explicitly, failed. thought rstudio somehow defines view() implementation in global environment, needs called view() without package/library reference. however, see, doesn't work either. potential reason of error might overestimated "smartness" of r in terms of use of ... arguments.

so, wrong , how fix it?

rstudio hooks view function. 1 approach might see if has overridden view function utils, , call override if exists. this? 

view <- if (identical(utils::view, view)) print else view

Comments

Post a Comment

Popular posts from this blog

c# - How to get the current UAC mode -

-
can check current uac type set in device before running application through c#. i got know approach check whether current user administrator or not. but, need know uac type set (i.e. default/never notify) internal logic. is possible? please help. this article self-elevation , checking level program runs in. due security reasons i'm afraid won't able retrieve uac level set. http://code.msdn.microsoft.com/windowsdesktop/csuacselfelevation-644673d3
Read more

postgresql - Lazarus + Postgres: incomplete startup packet -

-
i've been building lazarus pascal program using postgresql on back-end. used work fine following lines opening db. dbconn:= tpqconnection.create(nil); dbconn.hostname := 'localhost'; dbconn.databasename:= 'dbhrs'; dbconn.username:='mizk'; dbconn.password:='123'; dbconn.open; if dbconn.connected openhrsdb := true else openhrsdb := false; but moment change localhost server's ip (on lan), program stops. no errors or warnings. have no clue happening. here related details may narrow down problem. the program i'm running workstation on same lan server. both machines run ubuntu 12.04 desktop i can access postgres db on server using pgadmin iii, guess it's not firewall issue. i have allowed postgresql ufw , ufw disabled. strangely, when firewall disabled, can ssh server terminal using workstation. when it's enabled, can't my biggest concern right why pascal program not working when i...
Read more

javascript - Ajax jqXHR.status==0 fix error -

-
$.ajax({ url: urlstring, datatype: "json", type: "get", success: function (data) { alert(data); }, error: function (jqxhr, exception) { if (jqxhr.status === 0) { alert('not connect.\n verify network.'); } else if (jqxhr.status == 404) { alert('requested page not found. [404]'); } else if (jqxhr.status == 500) { alert('internal server error [500].'); } else if (exception === 'parsererror') { alert('requested json parse failed.'); } else if (exception === 'timeout') { alert('time out error.'); } else if (exception === 'abort') { alert('ajax request aborted.'); } else { alert('uncaught error.\n' + jqxhr.responsete...
Read more