search for: rabello

...reg)). I’m asking this because in Stata we could use function heckman and then use vce option “robust”. We could do the same for cluster. In a more general way, is there anyway to use another covariance matrix to make t-test (e.g. linear hypothesis) for heckit (selection) models? Thanks, Mateus Rabello [[alternative HTML version deleted]]

...24996 10020470 69 91 79 92 91 77 90 96 98 108 891 TRUE 1603 36145 10020470 0 0 0 0 2 83 112 97 91 144 529 FALSE 1603 44444 10023333 5 20 60 0 0 0 0 5 20 1000 1110 TRUE 1110 In the end I will eliminate all lines with X = FALSE. Thank you and sorry for the long question. Mateus Rabello [[alternative HTML version deleted]]

...799 # <<<- fiftieth event It is relatively easy to make it with plot() and then lines(), but that would have to use a for() loop, what compromises the speed in which I can have the results. I still have files with 5,000, sometimes 50,000 events... Regards, Andre. -- Andre Rabello DOS ANJOS, M.Sc. Signal Processing, Data Analysis and Computing Office: 32-2-A06, Tel: (+ 41 22) 767 5022 Fax: (+ 41 22) 767 8420 CERN - EP/HC Division CH-1211 Geneve 23 - Suisse/Switzerland http://cern.ch/rabello Public GPG key at http://www.keyserver.net -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-...

...isualization of this plot. Preferably as a lego plot, that is, a set of stacks that grow with respect to the value of z, which have their delta x and delta y lengths equivalent to the spacings between the values of x and y. Other people also call it a 3-D histogram. Regards, Andre. -- Andre Rabello DOS ANJOS, M.Sc. Signal Processing, Data Analysis and Computing Office: 32-2-A06, Tel: (+ 41 22) 767 5022 Fax: (+ 41 22) 767 8420 CERN - EP/HC Division CH-1211 Geneve 23 - Suisse/Switzerland http://cern.ch/rabello Public GPG key at http://www.keyserver.net -------------- next part -------------- An...

...quot; and "Name-2.pdf" that contain the two last histograms I've plotted. Is it a known problem? Or am I doing something wrong here? I attach the script to this message in the hope somebody knows the cause of this strange behaviour. Thanks in advance for any help. Andre. -- Andre Rabello DOS ANJOS, M.Sc. Signal Processing, Data Analysis and Computing Office: 32-2-A06, Tel: (+ 41 22) 767 5022 Fax: (+ 41 22) 767 8420 CERN - EP/HC Division CH-1211 Geneve 23 - Suisse/Switzerland http://cern.ch/rabello -------------- next part -------------- # Hello emacs (ess), this is -*- R -*- # $Id$...

Hi, How can I accomplish this in R. Example: I have the following data.frame: data <- data.frame(x=c(1,2,3,4,5,6,5,3,7,1,0,4,8),y=c(1,2,1,2,2,2,1,1,1,2,2,2,2),z=c(5,8,4,3,4,1,6,3,3,6,3,5,7)) Supposing that data$y is a factor, I would like to find the Spearman correlation between data$x and data$z indexing it by data$y. To be more specific, I want to find two correlations: between x and z