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From | Scott Merryman <scott.merryman@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: spmap myseriously dropping a category |
Date | Fri, 26 Feb 2010 11:57:03 -0600 |
I suspect it is due to the distribution of the var categories within year 1995. The default method is quantile so I would guess the var was only broken into two groups. Is you only have 3 categories wouldn't it be easier to use -clm(u)-? Using one of the example data sets from -spmap- compare: use "Italy-RegionsData.dta", clear keep if inrange(id, 8,13) spmap zone using "Italy-RegionsCoordinates.dta" , id(id) spmap zone using "Italy-RegionsCoordinates.dta" , id(id) clm(u) replace zone = 1 in 2 replace zone = 3 in 5 spmap zone using "Italy-RegionsCoordinates.dta" , id(id) Scott On Fri, Feb 26, 2010 at 11:08 AM, Dorothy Bridges <dbstata@gmail.com> wrote: > Dear Statalist, > > Allow me to preface this inquiry with an apology: I'm sorry that I am > not able to replicate my problem with publicly available datasets, and > that therefore this question may well be annoying and unanswerable. I > simply don't know where else to turn. > > I am using spmap to graph a ternary variable onto a map of the world. > My variable is time-series, and I would like to create one map for > each year. When I create the map for 2005, or for 2000, or for 1990, > it appears just as I imagined it. When I create the map for 1995, > though, Stata treats the first two categories as a single category. I > cannot fathom why this is the case (yes, I'm sure that all three > levels of my variable occur in 1995). The only difference in the > command line is an "if" clause. In other words: > > spmap var using file if year==2005 works beautifully, displaying three > colors corresponding to the three levels of var, but > spmap var using file if year==1995 displays only two colors, the first > corresponding to levels one and two, and the second corresponding to > level three. > > There is nothing fancy about the variable -- it takes the values 1, 2, and 3. > > Thanks so much in advance for your thoughts. > > Dorothy > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/