search for: mlarkin

...de on my maximum likelihood function would be greatly appreciated. ---------------------------- Original Message ---------------------------- Subject: RE: [R] maximum likelihood problem From: "Ravi Varadhan" <rvaradhan at jhmi.edu> Date: Fri, October 1, 2010 5:10 pm To: mlarkin at rsmas.miami.edu r-help at r-project.org -------------------------------------------------------------------------- Do you want to do a nonlinear least-squares estimation (which is MLE if the errors are Gaussian)? If so, you have to define a function that takes the parameter (k) and da...

I calculated a large vector. Unfortunately, I have some measurement error in my data and some of the values in the vector are erroneous. I ended up wih some Infs and NaNs in the vector. I would like to filter out the Inf and NaN values and only keep the values in my vector that range from 1 to 20. Is there a way to filter out Infs and NaNs in R and end up with a clean vector? Mike

I am trying to figure out how to run maximum likelihood in R. Here is my situation: I have the following equation: equation<-(1/LR-(exp(-k*T)*LM)*(1-exp(-k))) LR, T, and LM are vectors of data. I want to R to change the value of k to maximize the value of equation. My attempts at optim and optimize have been unsuccessful. Are these the recommended functions that I should use to maximize

...es. The code of x[is.finite(x)] did the trick. Thanks!!! Mike ---------------------------- Original Message ---------------------------- Subject: Re: [R] cleaning up a vector From: "Henrique Dallazuanna" <wwwhsd at gmail.com> Date: Fri, October 1, 2010 1:55 pm To: mlarkin at rsmas.miami.edu Cc: r-help at r-project.org -------------------------------------------------------------------------- Try this: x[is.finite(x)] On Fri, Oct 1, 2010 at 2:51 PM, <mlarkin at rsmas.miami.edu> wrote: > I calculated a large vector. Unfortunately, I have some measu...

I have R randomly sampling my array made up of 2 columns of data. Here is my code randomly sampling 5 different rows from my dataset to create a new dataset of 8 rows of data: testdat<-growth[sample(5,8,replace=T),] Now I want to tell R to repeat this function 50 times and give me the output. I have been searching the internet and have been unable to figure this out. Any advice

I am trying to get R to randomly select values from my dataset (i.e. bootstrapping) with replacement. However, my attempts at this have been unsuccessful. Here is a basic example of what I am doing: I have a data vector of 8 values (i.e. data= 2,5,9,4,5,6,7,8). I used the sample function and it worked. However, it only repeated my values in the exact same order as the dataset. It did not

I am trying to get R to resample my dataset of two columns of age and length data for fish. I got it to work, but it is not resampling every replicate. Instead, it resamples my data once and then repeated it 5 times. Here is my dataset of 9 fish samples with an age and length for each one: Age Length 2 200 5 450 6 600 7 702 8 798 5 453 4 399 1 120 2 202 Here is my code which resamples my

I am trying to get R to pick random integers from my dataset (i.e. bootstrapping) with replacement. However, my attempts at this have been unsuccessful. Here is a basic example of what I am doing: I have a data vector of 8 integers (data= 2,5,9,4,5,6,7,8). I used the sample function and it worked but it only repeated my values in the exact same order. It did not randomly sample them. Here

Thanks to the people on this list I was able to fix my code for randomly sampling. Thanks. Now, I am moving on to the next step and I ran into another snag. I have a large dataset but I am starting with a small made-up dataset until I figure it out. I have two columns of data (age and length). I got R to read my data called growth which is the age and length for 10 fish: >

I apologize if this comes across as confusing. I will try to explain my situation as best I can. I have R bootstrapping my growth data for fish. It's resampling my database of age and length data and then produces several new datasets for me. In this case, it's resampling my data to create three new datasets of age and length data. Here is my code with my original data called

https://bugzilla.mindrot.org/show_bug.cgi?id=2894 Bug ID: 2894 Summary: Set UpdateHostKeys for interactive sessions to 'ask' (or consider defaulting to 'yes') Product: Portable OpenSSH Version: 7.7p1 Hardware: Other OS: Other Status: NEW Severity: enhancement

Thanks to the help of people from this forum I was able to bootstrap my data and then apply a model to it. Thanks for all your help. Everything worked out well, but I am having a difficult time getting the new parameter values. I bootstrapped the data 300 times and I want to get the 300 sets of parameter estimates and plot them in Excel. Here is my code: