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From |
Christian Bustamante <cdeb77@gmail.com> |

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

Subject |
st: Mata question |

Date |
Sat, 4 Jul 2009 02:15:26 -0500 |

Hi all I'm trying to do a loot with a nested -ttesti- but I couldn't do it. I have two vector with different means (m1 and m2) and another two with each mean's standard deviation (s1 and s2). This vectors are quite large, so do -ttesti- element for element could be very costly. Also, I have each sample's size on two variables: n1 and n2. All this values are obtained from a logistic regresion. After run -ttesti- I want to save the t-statistic -r(t)- and the probability for two-sided p-value -r(p)-. I'm doing something like this: forvalues i=1/size(m1) { /* how can i get vector's size? */ ttesti n1 m1[1,`i'] s1[1,`i'] n1 m1[1,`i'] s1[1,`i'] mat tvalues[1,`i']=r(t) mat pvalues[1,`i']=r(p) } But appears a lot of errors: 1) n1 should be integer. 2) 'm1' found where number expected. 3) varlist not allowed. How can I solve this? Thanks -- CdeB * * 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: R: Mata question***From:*"Carlo Lazzaro" <carlo.lazzaro@tiscalinet.it>

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