I‘m trying to estimate the parameters of a simple model, but I keep getting the same error message: „could not calculate numerical derivatives missing values encountered, flat or discontinuous region encountered“
program define logit_error1
*** args lnf q alpha beta mu
Can anyone explain in simplistic terms the reason I would be receiving this error:
Java virtual machine exception. java.lang.NoClassDefFoundError:
Does it mean that my SAS package has not been correctly...
Hello - I've got a very basic question, but hoping for some help. Not even sure if this statistics or just algebra. I am trying to determine the error rate for a parking occupancy survey. Surveyors walked many blocks at different hours of the day and counted cars parked at legally available...
I wanted to do a Bayesian Regression in Winbug. The error message I got was "array index is less than one". There was also a trap #060 message.The Winbug code and Data are given below. I will be grateful to get advice on how I can correct these to
make the system run.
I’m seeking inspiration in creating a scoring (figure of merit) function that can evaluate how close a set of parallel measurements are to a set of truth values. The truth values aren’t a statistical mean per say, but rather target values being sought. A set of measurements...
I have been looking at using the position of the sun to estimate an observer's lat/lon. This relies on only three measurements, the sun's azimuth, elevation, and the time of observation. I wanted to get an idea of how accurately these three measurements must be known in order to determine the...
I'm looking for help with my syntax testing invariance of means and intercepts across two groups. The data was teacher-supplied, so my problem is DEFINITELY somewhere in my syntax, which is posted below. I keep getting errors saying my phi matrix is not positive definite, and I have...
I am currently attempting to compare the slopes of many linear graphs. Each graph is a plot of Time (independent variable) vs. Effect Size (dependent variable). I know the standard error associated with each measure of Effect Size. I want to know the error of the slope of each graph. However...
I am conducting a series of GLMs in order to find the minimum adequate model, the largest model in which all factors are significant. In some of my models all factors are significant, except for the intercept... what does this mean??
I wondered if there was anybody out there who could tell me how to work out the error in my numerical integration.
I have the falling side of a quasi-maxwell-boltzmann distribution and have 12 experimental data points and I only want to calculate the area between my first and last data...
I'm trying to use the user-created multinomRob to make some models for my data. While documentation for that function is great and I think I'm using it correctly, I'm getting the following error when I try to use my dataframes.
data <- read.csv("data.csv", header=FALSE)
Hi can someone please help me with this I don't know what's wrong and I went to my professor and he said he didn't know and that I should figure it out.
so I need to use a dataset called wine at
and then to use the k-nearest neighbor classifier...
I am looking for a rigorous mathematical development of non-linear least squares error analysis, specially the accuracy of the MLE estimate -- either in a text or a paper. This involves an analysis of the use of the hessian of the objective function, and the variance of the residuals as a scale...
I need your help to run the package "psych"
I download it but when I run
I get a message
The downloaded packages are in
It does not let me extract it either. :mad:
Also, does anyone...
I've been trying to run PROC MDC in SAS for several days and always get the
same error message, please help me!
Basically, my goal is to run a nested logit model for a dependent variable
called "pleasantness", with, for the moment, three explanatory dummy
variables (and maybe more...
Just a little something I am unsure about, I hope you can help!
So, If you have a pile of averages (say stem weight and root weight) and so you have two seperate standard errors. Now I want a standard error for the total weight, can I just add the two standard errors and have my...