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From |
nicola.baldini2@unibo.it |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: creating a matrix by adding rows inside a loop: conformability error |

Date |
Mon, 12 Nov 2007 14:09:52 +0100 |

I would like to create a matrix xtilde such that the i-th row is the sum of three components: (1) the i-th row of matrix xmean[63,15] multiplied by matrix p[15,15] (2) the vector mux[1,15] multiplied by the difference between idd[15,15] and p[15,15] (3) the i-th row of matrix dz[63,30] multiplied by matrix q[30,15] What's wrong in line 4. of the following syntax? All matrixes appearing in it have 15 columns, and thus there should be not any conformability error. . forvalues i = 1/63 { 2. mat p=inv((r1+vu)/ns[`i'])*r1 3. mat q=r2*(idd-p) 4. matrix xtilde[`i',.] = (nullmat(xtilde) \ xmean[`i',.]*p +mux*(idd-p)+dz[`i',.]*q)) 5. } conformability error r(503); Nicola * * 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/

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