# Re: fatal:ttest: ave1, ave2, var1, and var2 must have the same dimension sizes

Date: Thu, 18 Jun 2009 08:44:57 -0800

Dear Sara,
I think you get the error because of the order of variables
It should be

pd_ttest = ttest(xave,xs,dimsizes(x),yave,ys,dimsizes(y),False,False)

where xs and ys are variance

Thanks

Debasish

Quoting Sara Rauscher <rauscher_at_lanl.gov>:

> Hi,
> I am having a strange problem with the t-test function. I get the
> following error:
> fatal:ttest: ave1, ave2, var1, and var2 must have the same dimension sizes
>
> pd_ttest = ttest(xave,xs,yave,ys,30,30,False,False)
>
> My variables are 1-dim arrays (22 latitudes) and I calculated the
> average and variance for 30 year periods. I confirmed the size of my
> dimensions with a print statement:
>
> print(dimsizes(xave))
> print(dimsizes(yave))
> print(dimsizes(xs))
> print(dimsizes(ys))
>
> and got
>
> (0) 22
> (0) 22
> (0) 22
> (0) 22
>
> and I also printed the arrays themselves, and they have 22 values and no
> missing values (see below), so I can't figure out why I am getting this
> error message. Can anyone help?
> thanks
> sara
>
>
>
> print(xave)
> print(yave)
> print(xs)
> print(ys)
>
>
> Variable: xave
> Type: float
> Total Size: 88 bytes
> 22 values
> Number of Dimensions: 1
> Dimensions and sizes: [22]
> Coordinates:
> Number Of Attributes: 1
> _FillValue : -999
> (0) 38.41677
> (1) 39.64386
> (2) 41.47385
> (3) 44.06675
> (4) 47.31917
> (5) 51.75873
> (6) 57.4475
> (7) 63.6473
> (8) 68.18992
> (9) 67.7685
> (10) 63.71511
> (11) 60.09694
> (12) 56.81197
> (13) 49.33569
> (14) 38.55384
> (15) 29.95921
> (16) 25.55076
> (17) 24.26208
> (18) 24.80242
> (19) 26.68329
> (20) 29.91241
> (21) 34.80373
>
>
> Variable: yave
> Type: float
> Total Size: 88 bytes
> 22 values
> Number of Dimensions: 1
> Dimensions and sizes: [22]
> Coordinates:
> Number Of Attributes: 1
> _FillValue : -999
> (0) 38.65879
> (1) 39.98415
> (2) 42.00761
> (3) 44.70826
> (4) 48.20805
> (5) 52.77808
> (6) 58.35591
> (7) 64.10452
> (8) 67.57067
> (9) 65.82126
> (10) 61.38665
> (11) 58.20033
> (12) 55.7835
> (13) 49.1475
> (14) 38.43355
> (15) 29.89201
> (16) 25.79739
> (17) 24.80967
> (18) 25.70197
> (19) 28.22125
> (20) 32.30088
> (21) 38.35125
>
>
> Variable: xs
> Type: float
> Total Size: 88 bytes
> 22 values
> Number of Dimensions: 1
> Dimensions and sizes: [22]
> Coordinates:
> Number Of Attributes: 1
> _FillValue : -999
> (0) 0.6260661
> (1) 0.5729437
> (2) 0.4128477
> (3) 0.3623054
> (4) 0.365658
> (5) 0.353965
> (6) 0.3851641
> (7) 0.3345565
> (8) 0.6130542
> (9) 1.028439
> (10) 1.241542
> (11) 0.9425077
> (12) 0.6837122
> (13) 1.058546
> (14) 1.502718
> (15) 1.228511
> (16) 0.7692938
> (17) 0.5298799
> (18) 0.4911636
> (19) 0.4699926
> (20) 0.5076906
> (21) 0.6370612
>
>
> Variable: ys
> Type: float
> Total Size: 88 bytes
> 22 values
> Number of Dimensions: 1
> Dimensions and sizes: [22]
> Coordinates:
> Number Of Attributes: 1
> _FillValue : -999
> (0) 0.3511736
> (1) 0.4604303
> (2) 0.4525411
> (3) 0.3654905
> (4) 0.348264
> (5) 0.3517184
> (6) 0.3945064
> (7) 0.4603441
> (8) 0.5804898
> (9) 0.8942191
> (10) 1.401118
> (11) 1.237646
> (12) 0.6099019
> (13) 0.9476522
> (14) 1.49923
> (15) 1.268973
> (16) 0.8602446
> (17) 0.6390305
> (18) 0.4343098
> (19) 0.332505
> (20) 0.3948042
> (21) 0.7709378
>
> --
> Sara A. Rauscher
> T-3 Fluid Dynamics
> MS B216
> Los Alamos National Lab
> Los Alamos, NM 87545 USA
> (505) 606-0512
>
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Received on Thu Jun 18 2009 - 10:44:57 MDT

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