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From |
"Taha Kass-Hout" <kasshout@capastatistic.com> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: Reshape Wide |

Date |
Sat, 14 Sep 2002 23:46:30 -0400 |

Hello - When I try to reshape my data from long to wide I end up with far less observations than there is. I have total of 408 observations, instead I can only get 207 after reshaping the data. The long shaped data has the following vars: no str3 %3s date str9 %9s question str14 %14s answer str80 %80s Below is the do file I am running. Any help would be greatly appreciated - Thanks Taha *As data in "ans" contains almost just real numbers, I would split the *process into two parts: First part, the real numbers take less memory than strings. *Second part, the strings. *Then merge the two parts together. *---------------------------------------- *For the first part generate a variable, which contains the contents *of "ans" as a number: *---------------------------------------- * First Part * ---------- use survey.dta,clear /* Change to the name of your data */ d gen v = real(ans) *Then reshape this variable, and only the question, which has "real" *numbers as answers: drop ans keep if v ~= . *Reshape with the string option after changing the *points in the question numbers into "_" (or something else). replace question = subinstr(question,".","_",.) reshape wide v, i(no) j(question) string compress sort no save part1, replace *---------------------------------------- * Second Part * ----------- use survey, clear /* Change to the name of your data */ *Reshape the "real" string-data. gen v = real(ans) keep if v == . drop v ren ans v replace question = subinstr(question,".","_",.) reshape wide v, i(no) j(question) string compress sort no save part2, replace * Merge the two parts together * ---------- use part1, clear merge no using part2 assert _merge==3 /* Something is wrong if assertion is false */ drop _merge aorder /* Dont' like the order of vars? Use this or "order" */ save merge, replace *--------------------------------------------------------------------------- * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Re: saving matrices to Stata datafiles***From:*baum <baum@bc.edu>

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