On Thursday 05 February 2009 01:11, you wrote:
> Dear Users,
>
> my original data set is of x-y and t axes. I execute linear regresison
> along t axis.
>
> let p=t[gt=var]
> let q=var
> go regresst
>
> With this script i create a variable "qhat". Which is the equation of the
> linear trend (let qhat = slope*p + intercep). If i list qhat for the whole
> time and for the selected period, i get different results (see below). qhat
> for the whole time has the correct values, but i only want some selected to
> be listed or work with.
>
> Does someone know what could be the problem?
> Many thanks, Peter
>
> -------------------
> list qhat[l=1:10]
> 1 / 1: 3.091
> 2 / 2: 2.982
> 3 / 3: 2.873
> 4 / 4: 2.764
> 5 / 5: 2.655
> 6 / 6: 2.545
> 7 / 7: 2.436
> 8 / 8: 2.327
> 9 / 9: 2.218
> 10 / 10: 2.109
> list qhat
> 1 / 1: 2.383
> 2 / 2: 2.416
> 3 / 3: 2.449
> 4 / 4: 2.482
> 5 / 5: 2.515
> 6 / 6: 2.548
> 7 / 7: 2.580
> 8 / 8: 2.613
> 9 / 9: 2.646
> 10 / 10: 2.679
> 11 / 11: 2.712
> 12 / 12: 2.745
> 13 / 13: 2.778
> 14 / 14: 2.811
> 15 / 15: 2.844
> 16 / 16: 2.877
> 17 / 17: 2.910
> 18 / 18: 2.943
> 19 / 19: 2.976
> 20 / 20: 3.009
> 21 / 21: 3.041
> 22 / 22: 3.074
> 23 / 23: 3.107
> 24 / 24: 3.140
> 25 / 25: 3.173
> 26 / 26: 3.206
> 27 / 27: 3.239
> 28 / 28: 3.272
> 29 / 29: 3.305
> 30 / 30: 3.338
> 31 / 31: 3.371
> 32 / 32: 3.404
> 33 / 33: 3.437
> 34 / 34: 3.470
> 35 / 35: 3.502
> 36 / 36: 3.535
> 37 / 37: 3.568
> 38 / 38: 3.601
> 39 / 39: 3.634
> 40 / 40: 3.667