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From |
"Hugh Colaco" <hmjc66@gmail.com> |

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

Subject |
st: Conformability error in creating matrix while cross-tabulating data |

Date |
Thu, 5 Jul 2007 11:05:14 -0400 |

Dear Statalist, I am trying to get the frequency of certain variables and put it in a matrix (see code below). I need to cross tabulate each variable q271-q277 with each variable q256-q260. I then need to add the frequencies of q256-q258 as one group and q259-q260 as the other group. Finally, I want to create a 7 x 2 matrix of the results (q271-q277 will be the 7 rows; and q256-q258 & q259-q260 will be the 2 columns). I ran the following code, but am getting "conformability error". I think the problem is that I want a 7 x 2 matrix, but I'm using i = 271/277 rather than i=1/7. If this is the case, can you suggest an alternative? P.S. - Right now, I have variables q1-q7. I tried to drop them and rename q271-q277 as q1-q7 (in case this was the issue), without much luck. Thanks, Hugh matrix results = J(7,2,.); forval i = 271/277 {; count if q`i'~=. & q256~=.; local a = r(N); count if q`i'~=. & q257~=.; local a = `a' + r(N); count if q`i'~=. & q258~=.; matrix results[`i',1] = `a' + r(N); count if q`i'~=. & q259~=.; local b = r(N); count if q`i'~=. & q260~=.; matrix results[`i',2] = `b' + r(N); }; matrix colnames results = NP FP; matrix rownames results = q271 q272 q273 q274 q275 q276 q277; matrix li results, noheader; * * 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/

**Follow-Ups**:**st: RE: Conformability error in creating matrix while cross-tabulating data***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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