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From |
Zhi Su <[email protected]> |

To |
statalist <[email protected]> |

Subject |
Re:Re: Re: st: pick maximum,minimum, mode and median among scalars |

Date |
Wed, 10 Aug 2011 11:59:34 -0400 |

Dear Tirthankar, The codes are very helpful. I have a few more questions. The codes to indicate the index for minimum are vMinIndex = fnMatMaxIndex(-mBeta) I am a little bit confused here. Why entering parameter (-mBeta) in the mata function can produce index for minimum? Why not use the minindex(real vector v, real scalar k, i, w)? My actual case is more complicated. The four constraints in the regressions actually are ratios multiplied to variables and their combination change the values of depdedent variables. I run the regression under different combinations of the constraints, in other words, different depdedent varaibles. I record the combination of the ratios in the names of depdendent variables. Here is the codes. foreach n1 in 0 5 10 { foreach n2 in 0 5 10 { foreach n3 in 0 5 10 { foreach n4 in 0 5 10 { generate su_`n1'_`n2'_`n3'_`n4'= (`n1'*x1)/10+(`n2'*x2)/10+(`n3'*x3)/10+(`n4'*x4)/10 generate y_`n1'_`n2'_`n3'_`n4'=y- su_`n1'_`n2'_`n3'_`n4' regress y_`n1'_`n2'_`n3'_`n4' x5 x6 x7 x8, robust mat mBeta_y= (nullmat(mBeta_y) , e(b)') } } } } Using your codes, I have be able to get the maximum. minimum and median of the coefficients of variables of interest. Is there any way to record the names of depdendents corresponding to the maximum? For example, the maximum for coefficient of X5 is 0.005, when the denpdent variable is y_0_5_10_0=y-0*x1-0.5*x2-x3-0*x4. And the maximum for X6,X7 ,X8Then the maxindex matrix contain (y_0_5_10_0, y_10_0_0_5, y_5_5_10_5, y_0_5_0_5). --------------------------------------------------------------------------------

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