similar to: Variance of a non-linear combination of the coefficient e stiamtes

Hi, I would like to know if anyone has any idea of how to run an OLS with constraints? I need to contraint a coefficient estimate in the model equal to 1, and I am not sure how to include it into the OLS estimation... I was hoping to find something like "cnsreg" in STATA.. thank you Soyoko ______________________________________ Ms. Soyoko Umeno Graduate Research Assitant for the

Hi everyone, I have been trying to compute numbers of days between two dates as follows: > x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960") > z <- format(x, "%d%b%Y") > ex <- c("1jan1961", "15jan1960", "21mar1975", "10jul1981") > ez <- format(ex, "%d%b%Y") > ez-z

Hi, I am trying to figure out how to lable the second y-axis after the following codes: plot(x, y, xlab="time", ylab="pay1" ) par(new=TRUE) plot(x,y2, ann=FALSE, xaxt="n", yaxt="n", pch=7 ) axis(4) Then, I want to label the second y axis "pay2". I tried "title(ylab="pay2")", but it put this lable on the first

Hi, I would like to know if anyone has any idea of how to run an OLS with constraints? thank you Soyoko ______________________________________ Ms. Soyoko Umeno Graduate Research Assitant for the Illinois-Missouri Biotechnology Alliance (IMBA) at http://www.imba.missouri.edu/ Ph.D. Student at the Department of Agricultural and Consumer Economics at the University of Illinois at Urbana-Champaign

Hi, I would like to know if anyone knows how to compute a variance of the non-linear combination of the coefficient estimates. Say, I get a model of y~c+ax+bz (1) where x and z are the independent variables, c is the constant estimate, and a and b are the coefficient estimates. Then, I want to know the variance of b*c/a (2). How am I going to get it? In Stata, I can just use

Hi everyone, I am having a problem reading my data file in R. It only reads part of it, and stops doing it in half way through the data. I looked at the observation where reading stops, but it is really not different from the observations read it. I expanded the matrix size, but it did not help. I am using a text format to read the data file. Could someone help me? Thank you Soyoko

Hi, I would like to know if anyone knows how to draw a plot with two Y-axises and one X-axis? When you have two sets of y values that do not have the same scale, but correspond to the same x value, I would like to plot them on one graph. Could you please help me? Thank you Soyoko

Dear R Users, I did not get any reply on my question so I am re-asking. This time I am giving sample data: 1 60.3162 -13.5993 -0.4353 46.0938 0.1877 -0.194E-07 2 60.3713 -13.5992 -0.4423 46.1241 0.2057 -0.231E-06 3 60.3430 -13.5981 -1.6163 44.9048 0.2237 -0.270E-06 4 60.3227 -13.5970 -2.6258 43.8785 0.2213