How to compare stacked histograms/datasets
Hi, Sure, you could do a qqplot for each variable between two datasets. In a 2d graph, it will be hard to reasonably compare more than 2 datasets (you can put many such graphs on a single page, but it would be pairwise sets of comparisons, I think. Perhaps you could plots multiple qqplots on top of each other varying the points by colour for the different data sets? I have not seen anything like this before, so I suppose it depends what helps you understand your data. Cheers, Josh
On Sat, Jul 7, 2012 at 3:25 PM, Atulkakrana <atulkakrana at gmail.com> wrote:
Hello Joshua, Thanks for taking time out to help me with problem. Actually the comparison is to be done among two (if possible, more than two) datasets and not within the dataset. Each dataset hold 5 variables (i.e Red, Purple, Blue, Grey and Yellow) for 21 different positions i.e 1-21n. So, we have 5 values for each position (total 21) that make a single dataset or stacked histogram (Plot in original post). Initially I was comparing datasets by plotting stacked histograms for each and analyzing them visually. But that doesn't give a statistical idea of how similar or different the datasets are. Therefore, I want to evaluate the datasets in order to quantify their difference/similarity. So, end result would be a plot showing similarity/difference among two or more datasets. Example datasets: http://pastebin.com/iYj1RNvt Does the method you explained can be applied to multiple datasets? Can a qqplot be obtained in such a case? Awaiting your reply Thanks Atul -- View this message in context: http://r.789695.n4.nabble.com/How-to-compare-stacked-histograms-datasets-tp4635668p4635744.html Sent from the R help mailing list archive at Nabble.com.
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Joshua Wiley Ph.D. Student, Health Psychology Programmer Analyst II, Statistical Consulting Group University of California, Los Angeles https://joshuawiley.com/