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1. Re: Roll nlme (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Thu, 6 Apr 2006 23:53:44 +0800; Dear All This roll question reminds of previous problem. I have two matrix A (5000*60) and B (5000*60). What I need to do is to run the regression between the rows of A and B. out = A[1,]~B[1,]&#8230; /archives/html/s-news/2006-04/msg00027.html (9,218 bytes)
2. Monthly Average (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Mon, 24 Apr 2006 03:38:08 +0800; the; /archives/html/s-news/2006-04/msg00109.html (17,233 bytes)
3. TimeSeries Data Manipulation (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Wed, 26 Apr 2006 07:45:36 +0800; fo.; /archives/html/s-news/2006-04/msg00114.html (38,031 bytes)
4. organize objects in a chapter (score: 1): Author: "Sichong Chen" <sichong.chen@postgrad.manchester.ac.uk>; Date: Fri, 17 Feb 2006 19:02:51 +0800; Dear users I have two dumb questions about organize objects in my working chapter. In my working chapter, now I have about two hundred objects. I tried to create some folders in the chapter so that I; /archives/html/s-news/2006-02/msg00054.html (44,960 bytes)
5. Thanks and another question (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Sat, 18 Feb 2006 05:45:51 +0800; Thanks for the suggestions and help from Yingfu, Max and Chuck. They are very helpful. Now I don’t have to create so many different working chapters as before. I have another question. I attach; /archives/html/s-news/2006-02/msg00064.html (8,262 bytes)
6. Estimation of Time Varying Parameters (score: 1): Author: "Chen Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Sun, 6 Nov 2005 00:47:27 +0800; <o:p> </o:p> I am using nlminb to estimate a parameter which is time varying and autocorrelated by itself. Say, for example, <o:p></o:p> <o:p> </o:p> rho(t)=a0+alpha*rho(t-1)+beta*X(t-1)<o:p></o:p>; /archives/html/s-news/2005-11/msg00000.html (14,995 bytes)
7. produce more than one graphs at the same time (score: 1): Author: "Chen Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Sat, 12 Nov 2005 02:30:15 +0800; Dear All<o:p></o:p> <o:p> </o:p> I am using loop function to produce about 320 figures. I set par(mfrow=c(2,2)), so in each graph there are 4 figures and I want to get 80 graphs at the same time afte; /archives/html/s-news/2005-11/msg00027.html (9,645 bytes)
8. Simulation of multivariate student-t distribution (score: 1): Author: "Chen Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Tue, 22 Nov 2005 01:07:58 +0800; Dear All I have some questions about simulation of multivariate student-t distribution. I am a SPlus 7.0 & FinMetrics 2.0 User 1. Do you know any function in Splus to generate a multivariate student-; /archives/html/s-news/2005-11/msg00055.html (21,170 bytes)
9. CRSP data and big data time series (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Wed, 28 Jun 2006 01:19:24 +0800; Dear users: I have two questions regarding manipulation of the data obtained from CRSP and converted to big data time series object as I am new to CRSP data and big data object. My data object US is:; /archives/html/s-news/2006-06/msg00074.html (8,829 bytes)
10. CRSP data and big data time series (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Wed, 28 Jun 2006 01:30:10 +0800; Dear users:<o:p></o:p> <o:p> </o:p> Sorry for receiving this mail twice<o:p></o:p> <o:p> </o:p> I have two questions regarding manipulation of the data obtained from CRSP and converted to big data ti; /archives/html/s-news/2006-06/msg00075.html (36,791 bytes)
11. Re: CRSP data and big data time series (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Wed, 28 Jun 2006 21:00:05 +0800; Dear Paul<o:p></o:p> <o:p> </o:p> Thanks for reply. It does not display this object even after I refresh the object explorer. It is very weird for me too. <o:p></o:p> <o:p> </o:p> Does anyone have so; /archives/html/s-news/2006-06/msg00080.html (12,176 bytes)
12. Help with the data manipulation (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Thu, 29 Jun 2006 07:06:40 +0800; Dear User Could you be so kind to help me with this question. I have data set (11*3) like this: 1001 19950101 123 1001 19950102 234 1001 19950103 345 1002 19950101 1234 1002 19950102 2345 1002 199501; /archives/html/s-news/2006-06/msg00083.html (7,292 bytes)
13. Data manipulation and big data problem (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Fri, 30 Jun 2006 01:20:12 +0800; Thanks for Thomas's brilliant function and David's recommendation of the library. My problem has been solved. But I have a new question regarding process big data set. My data set is 2106745*3 (one y; /archives/html/s-news/2006-06/msg00090.html (7,554 bytes)
14. Invalid random number seed problem (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Mon, 3 Jul 2006 23:37:31 +0800; Dear Users: I have a problem when I import data into SPlus. When I import data, I tried to specify from which row it imports. But it report error and shows: "Invalid random number seed: numbers must; /archives/html/s-news/2006-07/msg00001.html (6,711 bytes)
15. Save several regression outputs in One Object (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Sun, 6 Aug 2006 06:42:00 +0800; Dear Users I have a question regarding on how to save several regression outputs in one object. I have a loop, which will do regression for 50 times and so it will have 50 outputs for the regression; /archives/html/s-news/2006-08/msg00013.html (7,384 bytes)
16. Matrix minus A Vector (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Fri, 27 Oct 2006 04:03:52 +0800; Dear Users I have a matrix (4x3) 4 5 6 2 4 5 2 4 6 6 5 5 3 8 9 And a vector (1x3) 2 4 3 I would like to use the first column of the matrix minus the first number of the vector "2", then the second co; /archives/html/s-news/2006-10/msg00055.html (7,442 bytes)
17. Re: Matrix minus A Vector (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Fri, 27 Oct 2006 06:07:13 +0800; Thank all. I have several replies. I summarize here. The sweep function is quite good. The margin should be 2, for column calculation. Or create a new matrix. A=matrix(0,nrow=5,ncol=3) ## Or make A; /archives/html/s-news/2006-10/msg00060.html (9,960 bytes)
18. OLS Regression Every Month (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Mon, 30 Oct 2006 00:47:05 +0800; Dear Users I have to do OLS every month for two series, which are both daily data. So I am supposed to do the regression for 84 times for 7 years data. Since it is supposed to do month, I can not use; /archives/html/s-news/2006-10/msg00065.html (7,042 bytes)
19. OLS or lm without a intercept (score: 1): Author: "Chen,Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Thu, 23 Nov 2006 05:07:54 +0800; Dear Users I have a question that how I can not include an intercept in OLS or lm linear regression Function. From the help, I find that lm (A~B-1) using "-1" can exclude the intercept, which works f; /archives/html/s-news/2006-11/msg00033.html (6,559 bytes)
20. lme and glme (score: 1): Author: "Chen, Sichong" <sichong.chen@postgrad.manchester.ac.uk>; Date: Mon, 13 Aug 2007 08:09:54 -0700; Dear user I want to ask a very basic question. Could someone tell me the difference between the function of lme and glme in CorrelatedData library? The glme seems to model the mixture effect models w; /archives/html/s-news/2007-08/msg00016.html (6,441 bytes)

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