Hello, I have another, more statistic related question. I have several different measurements as an output of an image analysis process (e.g. size, intensity, ... of objects of interests). Now, I would like to quantify the difference for each parameter measured in a special condition comparing to the measurement of a reference condition. If I plot the density distribution (simply calling density(data) ), I can see differences. But the parameters I'm measuring are not gaussian distributed for sure, sometimes a logarithmic visualization of the histogram gives a better idea of the distribution than a linear one. I'm not very deep into statistics and I was wondering whether I can use the "density" method at all, if yes: shall I be aware of how to set the parameters of this function or is standard enough (I think especially for the "logaritmic" data, it could be better to use other parameters... ) Does anybody know something about "posteriory pdf"? And then, are there methods how to compare density functions and how to quantify their difference?
Sorry for all these questions. I would be happy, if anybody could give me a hint how to approach the problem and probably refer to some good ("easy" to read) literature on this topic. Have a nice evening! Antje ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.