[ncl-talk] Problem with the function "lspoly" : difference between the result

Wed Jan 10 08:25:38 MST 2018

Lin,

It seems like an issue, but I'm unable to run your script because I don't
have the
HadCRUT4_ensemble.median_Ann_Global.txt file?
 Can you include this?

Thanks,

--Mary

On Tue, Jan 9, 2018 at 9:40 PM, 林祥 via ncl-talk <ncl-talk at ucar.edu> wrote:

> Hi, all
>
>      I just use the function “lspoly” to do polynomial fitting for some
> series, and met something strange .
> Here below is a part of my scripts
>
> …….
> ;  ***********************************
>     tstep = ispan(-maxlag,maxlag,1)                   ; define x axis
>
> ;  polynomial interpolation
>    c       = lspoly(tstep,ccrtot,1,3)
>
>    do k = 0,nd-1
>       print(k + "  " + xid(k) )
>       cc  = lspoly(tstep,ccrtot(k,:),1,3)
>       print(c(k,0)  +  "  " + cc(0))
>    end do
> ;   ***********************************
>
> Here below is a part of the corresponding output.
> We  can see that for most of the series, the result is consistent between
> c(k,0) and cc(0),
> however, for the other series , for example, the series with the id of “CA002202200”
> or “CA002204100”,
> there are difference between c(k,0) and cc(0).
>
> I am a little puzzled, why there are difference for the results of these
> series
> when I change the procedure of calling function. And Which way should I
> choose
> to got the correct polynomial fitting for all the series. (I also attached
> the
> whole scripts and data files, Please check it.)
>
> (0) 0  CA002100700
> (0) 0.239934  0.239934
> (0) 1  CA002100880
> (0) 0.380426  0.380426
> (0) 2  CA002202200
> (0) 0.380426  0.415303
> (0) 3  CA002202400
> (0) 0.328062  0.328062
> (0) 4  CA002202800
> (0) 0.233068  0.233068
> (0) 5  CA002204100
> (0) 0.233068  0.341998
> (0) 6  CA002300500
> (0) 0.233068  0.500022
> (0) 7  CA002300902
> (0) 0.233068  0.50636
> (0) 8  CA002301000
> (0) 0.477951  0.477951
> (0) 9  CA002400600
> (0) 0.477951  0.482882
> (0) 10  CA002401200
> (0) 0.619622  0.619622
> (0) 11  CA002403500
> (0) 0.557136  0.557136
> (0) 12  CAW00711410
> (0) 0.448455  0.448455
> (0) 13  CAW00719110
> (0) 0.550481  0.550481
> (0) 14  FI000000304
> (0) 0.511676  0.511676
> (0) 15  FI000002401
> (0) 0.511676  0.525073
> (0) 16  FI000007501
> (0) 0.511676  0.609115
> (0) 17  FIW00028050
> (0) 0.511676  0.539957
> (0) 18  FIW00028070
> (0) 0.55604  0.55604
> (0) 19  FIW00028230
> (0) 0.571857  0.571857
> (0) 20  FIW00028440
> (0) 0.571857  0.660955
> (0) 21  FIW00028450
> (0) 0.614022  0.614022
> (0) 22  FIW00028640
> (0) 0.561348  0.561348
> (0) 23  FIW00028690
> (0) 0.566393  0.566393
> (0) 24  FIW00028740
> (0) 0.553346  0.553346
> (0) 25  FIW00028750
> (0) 0.507437  0.507437
> (0) 26  FIW00028970
> (0) 0.464211  0.464211
> (0) 27  FIW00029100
> (0) 0.530141  0.530141
> (0) 28  FIW00029110
> (0) 0.452507  0.452507
> (0) 29  FIW00029130
> (0) 0.452507  0.585739
> (0) 30  FIW00029150
> (0) 0.452507  0.481584
> (0) 31  FIW00029170
> (0) 0.488413  0.488413
> (0) 32  FIW00029240
> (0) 0.487094  0.487094
> (0) 33  FIW00029290
> (0) 0.523639  0.523639
> (0) 34  FIW00029420
> (0) 0.531159  0.531159
> (0) 35  FIW00029440
> (0) 0.471023  0.471023
> (0) 36  FIW00029450
> (0) 0.495872  0.495872
> (0) 37  FIW00029470
> (0) 0.327738  0.327738
> (0) 38  FIW00029520
> (0) 0.489859  0.489859
> (0) 39  FIW00029580
> (0) 0.467005  0.467005
> (0) 40  FIW00029650
> (0) 0.467005  0.493549
> (0) 41  FIW00029660
> (0) 0.467005  0.542049
> (0) 42  FIW00029700
> (0) 0.494033  0.494033
> (0) 43  FIW00029720
> (0) 0.407923  0.407923
> (0) 44  FIW00029760
> (0) 0.502163  0.502163
> (0) 45  FOW00060110
> (0) 0.502163  0.553852
> (0) 46  GL000004360
> (0) 0.672092  0.672092
> (0) 47  GLW00042200
> (0) 0.511462  0.511462
> (0) 48  GLW00042600
> (0) 0.373208  0.373208
> (0) 49  GLW00042720
> (0) 0.50284  0.50284
> (0) 50  IC000004030
> (0) 0.713142  0.713142
> (0) 51  IC000004048
> (0) 0.671089  0.671089
> (0) 52  IC000004097
> (0) 0.581897  0.581897
> (0) 53  ICW00040050
> (0) 0.603685  0.603685
> (0) 54  NO000001026
> (0) 0.602763  0.602763
> (0) 55  NO000050540
> (0) 0.513178  0.513178
> (0) 56  NO000080700
> (0) 0.513178  0.620591
> (0) 57  NO000099710
> (0) 0.612189  0.612189
> (0) 58  NOE00105467
> (0) 0.612189  0.645705
> (0) 59  NOE00105477
> (0) 0.693077  0.693077
> (0) 60  NOE00105494
> (0) 0.635884  0.635884
> (0) 61  NOE00109394
> (0) 0.562202  0.562202
> (0) 62  NOE00109450
> (0) 0.445114  0.445114
> (0) 63  NOE00109459
> (0) 0.445114  0.592654
> (0) 64  NOE00109476
> (0) 0.535851  0.535851
> (0) 65  NOE00109485
> (0) 0.535851  0.595297
> (0) 66  NOE00109514
> (0) 0.527777  0.527777
> (0) 67  NOE00109604
> (0) 0.527777  0.541985
> (0) 68  NOE00109701
> (0) 0.579877  0.579877
>
> Thanks
>
>
>
> Lin
>
>
>
>
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