search for: b_4

Hi, I'm using the package quadprog to solve the following quadratic programming problem. I want to minimize the function (b_1-b_2)^2+(b_3-b_4)^2 by the following constraints b_i, i=1,...,4: b_1+b_3=1 b_2+b_4=1 0.1<=b_1<=0.2 0.2<=b_2<=0.4 0.8<=b_3<=0.9 0.6<=b_4<=0.8 In my opinion the solution should be b_1=b_2=0.2 und b_3=b_4=0.8. Unfortunately R doesn't find this solution and what's surprising to me,...

...ounted an ext3 partition to /home /dev/hdc2 /home type ext3 (rw,usrquota,acl) The following directory structur exists on /home /home +-/public_folder (exported per samba as \\fileserver\public ) | +-/a | +-/a_ann | | +-/anyfolder | | +- anyfiles | +-/a_bert | +-/a_sven | +-/a_eve | +-/b +-/b_4 +-/b_5 +-/b_6 The following users exists: ann bert sven eve Currently following ACL are set: /a - "inherit" at the filesystem is disabled by using setfacl -k - for any user with an own subdirectory a_<username> exists an ACE to allow Read and eXecute /a/a_ann -...

...tegration is not practical for many nonlinear mixed models. We were interested in seeing how well the use of the approximate log-likelihood values produced by ADMB-RE's Laplace approximation option would perform. We consider the alternative model with an extra interaction term (b_4) from Lesaffre et al. Here are the results for the laplace approximation: # Number of parameters = 5 log-likelihood = -627.809 name value std dev P vlaue b_1 -2.5233e+00 7.8829e-01 < 0.002 b_2 -3.0702e-01 6.8996e-01 0.655...

Hello, I have a data set which I am using to find a model with the most significant parameters included and most importantly, the p-values. The full model is of the form: sad[,1]~b_1 sad[,2]+b_2 sad[,3]+b_3 sad[,4]+b_4 sad[,5]+b_5 sad[,6]+b_6 sad[,7]+b_7 sad[,8]+b_8 sad[,9]+b_9 sad[,10], where the 9 variables on the right hand side are all indicator variables. The thing I don't understand is the line ' sad[, 10] NA NA NA NA ' as a result of 'Coefficients: (1 not defined...