{ "id": 1298, "title": " could not find function \"%dopar%\" ", "url": "/competitions/WhatDoYouKnow/discussion/1298", "author_name": "", "post_date": "2012-01-22T04:46:14.793Z", "votes": null, "comment_count": 6, "views": 7082, "content": "

 Hello guys, i am new to R. while using bigmemory + foreach i have encountered this error - 

\r\n
 could not find function "%dopar%"
\r\n
can anyone help me with this?
\r\n
 
\r\n
Here is code i am using
\r\n
#importing packages
\r\n
install.packages("bigmemory")
install.packages("biganalytics")

library(bigmemory)
library(biganalytics)
\r\n
#filling featureUsersAbility Matrix
foreach(user=users)%dopar%{
\t
\tforeach(feature_name=feature_names)%dopar%{

\t\tfeature=strsplit(feature_name," ")
\t\tprint(feature)

\t\t#here we are simply putting the correct/total in usersability
\t\ttotalRecords=mwhich(training,c("user_id",feature[[1]][1]),list(user,feature[[1]][2]),"eq","AND")
\t\tcorrectRecords=mwhich(training,c("user_id",feature[[1]][1],"outcome"),list(user,feature[[1]][2],1),"eq","AND")
\t\tprint(totalRecords)
\t\tprint(correctRecords)
\t\tif(length(correctRecords)>0){
\t\t\tfeature_UserAbility[user,feature_name]<-length(correctRecords)/length(totalRecords)
\t\t}
\t}
}
", "messages": [ { "id": "8212", "postDate": "01/22/2012 04:46:14", "content": "

 Hello guys, i am new to R. while using bigmemory + foreach i have encountered this error - 

\r\n
 could not find function "%dopar%"
\r\n
can anyone help me with this?
\r\n
 
\r\n
Here is code i am using
\r\n
#importing packages
\r\n
install.packages("bigmemory")
install.packages("biganalytics")

library(bigmemory)
library(biganalytics)
\r\n
#filling featureUsersAbility Matrix
foreach(user=users)%dopar%{
\t
\tforeach(feature_name=feature_names)%dopar%{

\t\tfeature=strsplit(feature_name," ")
\t\tprint(feature)

\t\t#here we are simply putting the correct/total in usersability
\t\ttotalRecords=mwhich(training,c("user_id",feature[[1]][1]),list(user,feature[[1]][2]),"eq","AND")
\t\tcorrectRecords=mwhich(training,c("user_id",feature[[1]][1],"outcome"),list(user,feature[[1]][2],1),"eq","AND")
\t\tprint(totalRecords)
\t\tprint(correctRecords)
\t\tif(length(correctRecords)>0){
\t\t\tfeature_UserAbility[user,feature_name]<-length(correctRecords)/length(totalRecords)
\t\t}
\t}
}
", "rawMarkdown": "", "votes": null }, { "id": "8214", "postDate": "01/22/2012 04:47:30", "content": "

Also where can i get good forums on R , where i can discuss about R?

", "rawMarkdown": "", "votes": null }, { "id": "8219", "postDate": "01/22/2012 19:30:36", "content": "

dopar is from the package "foreach" I don't see you having loaded it...

", "rawMarkdown": "", "votes": null }, { "id": "8253", "postDate": "01/25/2012 00:58:24", "content": "

It may not help much, but Quick-R (http://www.statmethods.net/) Is a pretty great website to get familiar, err... "quickly" with what R has to offer.

", "rawMarkdown": "", "votes": null }, { "id": "8254", "postDate": "01/25/2012 04:31:40", "content": "

Thanks podo for link, actually i had to reinstall R , then the issue i mentioned got resolved. Now i am facing more pronounced issue. I am using bigmemory fo handling large datasets and doSMP for parallelism. But when i try to execute foreach loop it hangs\r\n my computer and starts showingme microsoft errors. Do you anything about it?

\r\n

This is code i am trying to execute

\r\n
x<-foreach(user=users[1:2])%:%
foreach(feature_name=feature_names[1:3],.packages=c("bigankalytics","bigmemory"))%dopar%
\t{
\tfeature=strsplit(feature_name," ")

\t#here we are simply putting the incorrect/total in user ability for feature
\ttotalRecords=mwhich(training,c("user_id",feature[[1]][1]),list(user,feature[[1]][2]),"neq","AND")
\tcorrectRecords=mwhich(training,c("user_id",feature[[1]][1],"outcome"),list(user,feature[[1]][2],1),"eq","AND")
\tif(length(correctRecords)>0){
\t\tfeature_UserAbility[as.character(user),as.character(feature_name)]<-length(correctRecords)/length(totalRecords)
\t}

\t}
x
\r\n

 

", "rawMarkdown": "", "votes": null }, { "id": "8262", "postDate": "01/25/2012 18:54:05", "content": "

I'm not familiar with Microsoft bugs since I run R on a linux machine. How much RAM and scrap do you have available? My current script runs on about 4gb of RAM, and reading previous forum questions, it looks like a common scenario. Have you tried setting\r\n up an EC2 machine?

", "rawMarkdown": "", "votes": null }, { "id": "8264", "postDate": "01/25/2012 23:25:24", "content": "

I am using 4 gb ram. And i have assigned 2 out of four cores of my computer to registerdoSMP. I am not sure why error is coming. When ever i try to include packages as below the error starts coming. May be some syntax error in adding packages.

\r\n
foreach(feature_name=feature_names[1:3],.packages=c("bigankalytics","bigmemory"))%dopar%
", "rawMarkdown": "", "votes": null } ], "comments": [ { "id": 8214, "author_name": "mohit29765", "author_url": "", "post_date": "01/22/2012 04:47:30", "content": "

Also where can i get good forums on R , where i can discuss about R?

", "votes": null, "replies": [] }, { "id": 8219, "author_name": "biasvariance", "author_url": "", "post_date": "01/22/2012 19:30:36", "content": "

dopar is from the package "foreach" I don't see you having loaded it...

", "votes": null, "replies": [] }, { "id": 8253, "author_name": "podopie", "author_url": "", "post_date": "01/25/2012 00:58:24", "content": "

It may not help much, but Quick-R (http://www.statmethods.net/) Is a pretty great website to get familiar, err... "quickly" with what R has to offer.

", "votes": null, "replies": [] }, { "id": 8254, "author_name": "mohit29765", "author_url": "", "post_date": "01/25/2012 04:31:40", "content": "

Thanks podo for link, actually i had to reinstall R , then the issue i mentioned got resolved. Now i am facing more pronounced issue. I am using bigmemory fo handling large datasets and doSMP for parallelism. But when i try to execute foreach loop it hangs\r\n my computer and starts showingme microsoft errors. Do you anything about it?

\r\n

This is code i am trying to execute

\r\n
x<-foreach(user=users[1:2])%:%
foreach(feature_name=feature_names[1:3],.packages=c("bigankalytics","bigmemory"))%dopar%
\t{
\tfeature=strsplit(feature_name," ")

\t#here we are simply putting the incorrect/total in user ability for feature
\ttotalRecords=mwhich(training,c("user_id",feature[[1]][1]),list(user,feature[[1]][2]),"neq","AND")
\tcorrectRecords=mwhich(training,c("user_id",feature[[1]][1],"outcome"),list(user,feature[[1]][2],1),"eq","AND")
\tif(length(correctRecords)>0){
\t\tfeature_UserAbility[as.character(user),as.character(feature_name)]<-length(correctRecords)/length(totalRecords)
\t}

\t}
x
\r\n

 

", "votes": null, "replies": [] }, { "id": 8262, "author_name": "podopie", "author_url": "", "post_date": "01/25/2012 18:54:05", "content": "

I'm not familiar with Microsoft bugs since I run R on a linux machine. How much RAM and scrap do you have available? My current script runs on about 4gb of RAM, and reading previous forum questions, it looks like a common scenario. Have you tried setting\r\n up an EC2 machine?

", "votes": null, "replies": [] }, { "id": 8264, "author_name": "mohit29765", "author_url": "", "post_date": "01/25/2012 23:25:24", "content": "

I am using 4 gb ram. And i have assigned 2 out of four cores of my computer to registerdoSMP. I am not sure why error is coming. When ever i try to include packages as below the error starts coming. May be some syntax error in adding packages.

\r\n
foreach(feature_name=feature_names[1:3],.packages=c("bigankalytics","bigmemory"))%dopar%
", "votes": null, "replies": [] } ], "raw_markdown_by_id": { "8212": "", "8214": "", "8219": "", "8253": "", "8254": "", "8262": "", "8264": "" }, "source": "meta" }