search for: y_mean

Hello, and please excuse this off-topic question, but I have not been able to find an answer elsewhere. Consider a value Z that is calculated using the product (or ratio) of two means X_mean and Y_mean: Z=X_mean*Y_mean. More generally, Z=f(X_mean, Y_mean). The standard error of Z will be a function of the standard errors of the means of X and Y. I want to calculate this se of Z. Can someone direct me to a reference (text book or other) that gives the solution to this *general* problem? Thank...

Hi Dirk, I didn't capture the output but using Focal I got an error with RcppParallel trying to open a file that wasn't found, and plotly::ggplot() would not render a ggplot graph. 20.10 is working well for me otherwise. Frank http://fharrell.com http://biostat.mc.vanderbilt.edu/FrankHarrell Twitter: @f2harrell ---- On Sun, 25 Oct 2020 11:52:43 -0500

...observation: r-cran debian now seems to be in Ubuntu 20.10 Universe so I don't need to add the repo any more. Here is a reproducible example that fails with the latest r-cran-rcppparallel but works when I manually install the source package: require(rstan) stancode <- 'data {real y_mean;} parameters {real y;} model {y ~ normal(y_mean,1);}' mod <- stan_model(model_code = stancode, verbose = TRUE) TRANSLATING MODEL '16a540c6086086816528e4524def24d9' FROM Stan CODE TO C++ CODE NOW. successful in parsing the Stan model '16a540c6086086816528e4524def24d9'. C...