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After installing Ruby, i tried installing Rails and this is the error i got: C:\Users\Eunice>gem install rails Building native extensions. This could take a while... ERROR: Error installing rails: ERROR: Failed to build gem native extension. C:/Ruby/bin/ruby.exe extconf.rb checking for re.h... *** extconf.rb failed *** Could not create Makefile due to some reason, probla...

...value-weighted CRSP index is above a threshold level and zero otherwise. and at the same time add the restriction: αMkt Low + βMkt Low · Threshold = αMkt High + βMkt High · Threshold to ensure continuity. But I do not know how to add this restriction in R, could you help me on this? Thanks a lot! Eunice [[alternative HTML version deleted]]

...th[1]="C:\Program Files\R\R-2.9.0\library/robustbase": The system cannot find the file specified > I have had the same problem for months. Have you found a solution? Maurice O. Maurice Haynes, Ph.D. Statistician, Child and Family Research Section Laboratory for Comparative Ethology Eunice Kennedy Shriver National Institute of Child Health and Human Development NIH, DHHS 6705 Rockledge Drive, Suite 8030 Bethesda, Maryland 20892 Phone: 301-496-8180 E-mail: mh192j@nih.gov<mailto:mh192j@nih.gov> [[alternative HTML version deleted]]

Dear R community I am using the gee package to run logistics regression on paired cases from a panel sample. We are getting request from a reviewer to use sample weights to account for different level of attrition. After searching the documentation I am unable to find a way to incorporate sample weights into the gee formula. I found a way to incorporate precision weight but I understand that I

I do not understand the following output. The actual command and error are: juliet:/mnt # smbmount //compaq/mastertools /mnt/dos -o username=alan password=eunice Password: 10300: tree connect failed: ERRSRV - ERRbadpw (Bad password - name/password pair in a Tree Connect or Session Setup are invalid.) SMB connection failed It seems the user validates at the os level , but later fails when using the locked share - Why ? Relevant bits of smb.conf...

Hiall, Unfortunately I just can''t find out how to setup a default selected value when using collection_select. My call is like so: <%= collection_select(:consultant, :lastname, @consultants, :id, :lastname, { :selected => @current_consultant.id } ) %> which is not working, I debugged so far that I know that @current_consultant.id contains the correct value. Any tips? cheers

I have data that looks like this: > df1 group id 1 red A 2 red B 3 red C 4 blue D 5 blue E 6 blue F I want a list of the groups containing vectors with the ids. I am avoiding subset(), as it is only recommended for interactive use. Here's what I have so far: df1 <- data.frame(group=c("red", "red", "red", "blue",