search for: limiar

Hi R users I'm trying to fit a model y=ax^b. I know if I made ln(y)=ln(a)+bln(x) this is a linear regression. But I obtain differente results with nls() and lm() My commands are: nls(CV ~a*Est^b, data=limiares, start =list(a=100,b=0), trace = TRUE) for nonlinear regression and : lm(ln_CV~ln_Est, data=limiares) for linear regression Nonlinear regression model: a=738.2238151 and b=-0.3951013 Linear regression: Coefficients: E...

...raphics(plots) at the same time. Although, because of the parameter "mfg", the parameter "bg" don´t change the background color. What can I do to solve this? Here is the code I'm using... ... i <- 1 for(j in 1:4){ for(k in 1:2){ limiares <- tabLimiar(arrayMetricas[,i]) op <- par(mfrow=c(4,2),pty="s") par(mfg=c(j,k)) plot(limiares,main=a[i],ylab="frequencia",xlab="limiares",bg="white",col="green",col.main="se...

Hi: I am going through some of the xtable examples and I can't make the one below work. I need to create a longtable on the fly keeping the column headers for all the pages and I thought this example could give some ideas on how to do it. I am using Sweave and xtable to create my tables and graphics. I wonder if someone could tell me what's wrong. Thanks ## Not run: \begin{small}