It would be quite easy to make the plug-in output every n'th sample (example, every 100th sample), but that's probably not going to give you what you want, unless the peaks are evenly spaced at intervals of a known number of samples.
What Sample Data Export is designed to do, is to output the raw data (sample values) in a simple text / csv format so that the data can be analyzed in other application (such as spreadsheets or graph drawing programs). What are you wanting to do with the data? What is the purpose of this?
ok...can you send me some instruction, how can i get the data with n-th simples? maybe that would be ok only with this data its for some project in school and i must compare results from another attempt