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From |
Dani Tilley <tilleydani@yahoo.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Re: Extracting specific elements from a matrix |

Date |
Mon, 5 Jul 2010 14:10:15 -0700 (PDT) |

Much appreciated Martin. Incidentally, how do you go about creating an empty vector in Stata? I noticed that -generate- creates a new variable of length N,but what if I want a variable of length 10? I tried macro and local but they appear to hold strings rather than floats. ----- Original Message ---- <> Either talk to the coeff as "_b" (-help _variables-) or define a -matrix- and extract from it: *********** sysuse auto, clear reg price weight length rep78 di _b[weight] mat A=e(b) di A[1,1] *********** HTH Martin From: Dani Tilley <tilleydani@yahoo.com> To: statalist@hsphsun2.harvard.edu Sent: Mon, July 5, 2010 4:36:25 PM Subject: Extracting specific elements from a matrix Hi, I need to extract the first element of a matrix of coefficients and store it on a variable, and repeat the process i times. I can set up the for loop and do the storing, but I don't know how to access element [i,j] of a matrix A. In particular, my matrix is e(b), the vector of coefficients from a regression with k explanatory variables. I tried -e(b)[1,1]- but that didn't take me far. Any help is appreciated. Thanks, DF Tilley * * 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/

**Follow-Ups**:**st: RE: Re: Extracting specific elements from a matrix***From:*"Martin Weiss" <martin.weiss1@gmx.de>

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