Search found 63 matches

by adeldaoud
Sat Apr 21, 2018 9:11 pm
Forum: R2MLwiN user forum
Topic: Number of observations displayed
Replies: 8
Views: 1884

Re: Number of observations displayed

Thanks for your reply Chris. I was concerned that the difference between the models given the small data would hide in the third or fewer decimal points. So I expanded the same data, and ran the models. As you see below, I do still get a difference within Mlwin. Not sure if this is unique to my PC. ...
by adeldaoud
Wed Apr 18, 2018 11:06 pm
Forum: R2MLwiN user forum
Topic: Number of observations displayed
Replies: 8
Views: 1884

Re: Number of observations displayed

Chris, I ran a test testing the difference between the two id styles. I used the data given in LEMMA section 11.2: A Three-Level Variance Components Model using the the STATA data 11.2.dta. library(foreign) tut <- read.dta("11.2.dta") # run with unique Id unique.id.performance <- rep(NA, 10) for(i i...
by adeldaoud
Wed Apr 18, 2018 9:57 pm
Forum: R2MLwiN user forum
Topic: Specifying weight in R2MLwiN
Replies: 8
Views: 2421

Re: Specifying weight in R2MLwiN

Thanks to both of you. I missed this solution while browsing through the topics. I confirm this works. On a related note. I wonder how rp- and fpsandwish works for weighting? The manual states: weighting: a deprecated option for specifying weights in IGLS estimation: see fpsandwich and rpsandwich fo...
by adeldaoud
Wed Apr 18, 2018 12:33 pm
Forum: R2MLwiN user forum
Topic: Specifying weight in R2MLwiN
Replies: 8
Views: 2421

Re: Specifying weight in R2MLwiN

Could you try adding the debugmode=TRUE option and then checking within the MLwiN interface whether any errors are reported? When I enter debugmode I discover that Mlwin crashes. I tried varying the following arguments, but it still crashes: optimat=, resi.store = , x64= , weighting = list(weightva...
by adeldaoud
Wed Apr 18, 2018 12:16 pm
Forum: R2MLwiN user forum
Topic: Define reference category for non-numeric covariates
Replies: 2
Views: 1341

Re: Define reference category for non-numeric covariates

ok, thanks Chris. It was not immediately clear from the R2mlwin documentation (https://cran.r-project.org/web/packages ... 2MLwiN.pdf), pp. 22-23. An additional note is may be required.
by adeldaoud
Wed Apr 18, 2018 12:08 pm
Forum: R2MLwiN user forum
Topic: Number of observations displayed
Replies: 8
Views: 1884

Re: Number of observations displayed

Hi Chris, I would have to check, but it's possible that the R display is using unique codes instead of changes to the ID value as in MLwiN to determine different units. Ok, thanks, that would be great. Again, I could, of course, use unique id, but performance is noticeably slower with large datasets...
by adeldaoud
Tue Apr 17, 2018 11:30 pm
Forum: R2MLwiN user forum
Topic: Number of observations displayed
Replies: 8
Views: 1884

Number of observations displayed

Hi The mymodel@Hierarchy slot does not get the correct number of intermediate levels (e.g. class id in a data of students nested in class nested in schools) when these intermediate unit id are renumbered. For example: School class student 1 1 1 1 1 2 1 2 1 1 2 2 2 1 1 2 1 2 2 2 1 2 3 1 The reason I ...
by adeldaoud
Tue Apr 17, 2018 10:35 pm
Forum: R2MLwiN user forum
Topic: Specifying weight in R2MLwiN
Replies: 8
Views: 2421

Re: Specifying weight in R2MLwiN

Hi Chris, Trying to add weights in a four-level mode and only for the first level. I assume this is a correction estimation option argument: estoptions = list(EstM = 0, optimat=T, resi.store = TRUE, debugmode=F, weighting = list(weightvar=c(NA,NA,NA, "wg"), standardised=T)) f2 = as.formula(abspov ~ ...
by adeldaoud
Tue Apr 17, 2018 9:37 pm
Forum: R2MLwiN user forum
Topic: Define reference category for non-numeric covariates
Replies: 2
Views: 1341

Define reference category for non-numeric covariates

Hi (A) How can I define the reference category for non-numeric covariates (binary, ordinal, or multinomial)? According to the manual "[] When placed immediately after an explanatory variable, indicates that the variable is categorical.The string in the [] represents the reference category; if empty,...
by adeldaoud
Fri Aug 11, 2017 8:36 am
Forum: MLwiN user forum
Topic: Zero-inflated negative binomial models?
Replies: 5
Views: 1899

Re: Zero-inflated negative binomial models?

Ok, thanks, Chris.

Looking forward to reading Kelvyn's module.