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Avoid inconsistent results while using Predict to analyze some data?

Hello every one. I am trying to use the Predict function to analyze some data, but every time that i reevaluate the note book the function shows different results. I have two variables:

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and

AGILENT={1062796,-0.227`,0.3135`,-0.315`,-0.2247`,-0.059`,0.4633`,0.199`,0.4011`,1.0789`,0.2458`,0.5504`,0.276`,-0.0599`,0.8669`,-0.1584`,-0.1519`,1.123`,0.772`,0.5171`,0.9237`,0.109`,0.4527`,-0.7195`,-1.0895`,-0.6158`,-0.6544`,-0.2391`,-0.4781`,0.1691`,0.0674`,-0.4359`,-0.1168`,-0.1164`,-0.1471`,-0.1739`,-1.2457`,-0.7477`,-0.1669`,-0.0637`,-0.0338`,-0.0803`,-1.6139`,-1.3083`,-0.6704`,-0.6098`,-1.778`,0.0315`,0.0627`,-0.6296`,-0.4831`,-0.0851`,-0.5802`,-0.46`,-0.2771`,-0.0379`,0.1492`,-0.6829`,-0.5734`,-0.1555`,-2.4262`,-0.2685`,-0.8967`,-0.2881`,0.6175`,-1.3514`,-0.7246`,-0.5973`,-0.997`,-1.134`,-0.4551`,-0.7022`,-0.4041`,-1.648`,0.3122`,-0.8768`,-0.4162`,0.4008`,0.7131`,0.3959`,-0.045`,-1.1812`,-0.5045`,0.5288`,0.4106`,-0.4672`,-0.3195`,-0.0493`,-0.1724`,-0.5569`,-0.0708`,0.3672`,-0.941`,-0.305`,-0.1535`,0.4834`,0.5371`,-2.2782`,-1.5894`,-1.6601`,-1.3582`,-2.6121`,-2.9575`,-0.6178`,-1.0722`,-0.8126`,-0.7143`,-3.2679`,-0.0811`,-1.9667`,-1.9039`,-2.5393`,-0.7471`,-2.5647`,-2.1851`,-0.7856`,-0.7099`,-2.4029`,-1.2737`,-2.9704`,-1.7497`,-1.1031`,-1.6144`,-2.4823`,-1.4495`,-1.698`,-1.0875`,-1.9844`,-0.6528`,-1.1168`,-1.2013`,-1.4745`,-1.7245`,-1.6399`,-1.4036`,-1.5812`,-1.3431`,-0.5843`,-0.527`,-1.6225`,-1.4485`,-1.8701`,-0.8723`,-1.0652`,-1.2174`,-0.777`,-0.8294`,-1.8082`,-3.4102`,-2.5012`,-1.9714`,-1.8301`,-1.2468`,-1.6634`,-1.4148`,-2.5217`,-1.2326`,-2.4257`,-1.2404`,-0.7779`,-0.5167`,-2.2303`,-1.7165`,-1.2196`,-0.7049`,-1.2424`,-1.5221`,-0.4341`,-0.737`,-1.3336`,-0.7463`,-0.5073`,-0.6181`,0.0405`,-0.2661`,-1.2962`,0.5782`,-0.2528`,-0.8044`,-1.9055`,-1.1134`,-0.2153`,-0.501`,-1.3717`,-2.2886`,-1.2564`,-0.7993`,-0.846`,-0.8036`,-1.7711`,-1.0433`,-0.3498`,-0.657`,-0.7525`,-0.4687`,-0.2011`,0.3193`,0.2622`,-0.6255`,-1.1078`,-0.6294`,-0.7402`,-0.7859`,-0.9221`,-1.1715`,-1.2297`,-0.7568`,-1.1592`,-0.1374`,0.1016`,-0.4251`,-0.0396`,-2.6916`,-1.3856`,-0.493`,-1.345`,-2.3665`,-0.1735`,-2.0442`,-1.2061`,-1.5491`,-0.3442`,0.0506`,0.4327`,0.6191`,-1.9663`,-1.2416`,-1.4676`,-2.2327`,-1.0792`,0.1271`,-2.1006`,-1.8112`,-2.1409`,-1.6059`,-1.4409`,-0.4718`,-1.9702`,-1.3118`,-1.013`,-0.9018`,-0.983`,-0.7152`,-2.7191`,-1.0859`,-1.0305`,-1.0904`,-0.5746`,-0.7544`,-0.2465`,-0.612`,-0.3089`,-0.2944`,-0.603`,-1.8212`,0.6071`,-0.2252`,-1.1864`,-1.8702`,-0.5679`,-1.4007`,-1.36`,-1.2731`,-0.1473`,-0.6025`,-1.3113`,-2.2561`,-0.8062`,-0.7785`,-1.4273`,-2.0768`,0.2909`,0.3781`,-1.4623`,-1.0592`,-1.9499`,-0.9635`,-0.1579`,0.0426`,-2.5254`,-2.2583`,-1.3204`,-1.4552`,-1.9398`,-2.3162`,-0.0654`,-0.0436`,-2.0231`,-1.2075`,-3.2933`,-1.0291`,0.0173`,-0.0501`,-0.907`,0.4034`,0.5346`,-0.7229`,-1.9733`,-0.4587`,-0.8543`,-0.5208`,-1.0768`,-0.6457`,-0.4985`,-0.9888`,-1.4049`,-0.9113`,-1.5899`,-0.7`,0.0303`,-1.7607`,-0.3463`,-1.0528`,-1.1731`,-0.3479`,-0.4942`,-1.7306`,-0.6382`,-1.4129`,-1.431`,-1.5256`,-0.2694`,-0.2622`,-2.6819`,-1.1337`,-0.0838`,-0.3524`,-0.6037`,-1.2748`,0.1041`,-0.1988`,-0.2062`,-0.7667`,-0.3119`,-1.5349`,-0.5591`,-0.0133`,0.244`,-0.1525`,-0.9886`,0.3319`,0.0755`,-1.0756`,0.088`,0.0886`,-0.9427`,-0.5339`,0.2819`,0.2582`,-0.498`,-1.1231`,-0.8579`,0.3583`,-0.2234`,0.2696`,-0.2463`,-0.1605`,-0.9391`,-0.509`,-0.9274`,-0.6171`,-1.0397`,-0.0096`,-0.9454`,-0.052`,-0.6959`,-0.0141`,0.09`,-0.1729`,-0.6625`,0.2904`,-0.4279`,-0.4307`,0.2625`,-0.7172`,-0.8041`,0.3183`,-0.4501`,0.2482`,-0.0165`,-1.0168`,-0.3885`,0.2109`,0.2435`,-0.6739`,-0.5911`,0.0011`,0.2683`,-1.7693`,-1.7478`,0.087`,-0.1533`,-1.3043`,-0.1802`,-0.5677`,-0.6785`,-0.3173`,0.306`,0.1887`,-1.4727`,-1.1789`,-0.1029`,0.1034`,-0.62`,-0.7933`,0.312`,-0.4378`,-0.9934`,-0.7005`,-0.3944`,-0.6094`,0.3224`,0.3765`,-0.1601`,-0.8419`,-0.2262`,0.082`,-1.541`,-1.2058`,0.2551`,0.1379`,-0.4003`,0.6588`,0.0438`,-0.1884`,-1.0051`,-0.7201`,-0.2065`,0.4209`,-0.1084`,-0.7311`,-3.0099`,-0.3016`,-0.0587`,-1.8162`,-1.4776`,0.8688`,0.136`,0.7541`,0.3327`,-0.8604`,-0.3479`,0.5957`,0.3351`,-0.7701`,-1.0417`,-0.643`,0.3958`,-0.0059`,0.0525`,-0.9926`,-1.0342`,0.3259`,-0.2083`,-1.7171`,-0.4551`,-0.03`,-0.074`,-0.2536`,-0.5067`,-0.4516`,0.1125`,0.2439`,-0.4459`,-0.6971`,0.3843`,-0.5095`,-2.4023`,-1.2413`,0.2187`,0.1135`,-0.6688`,-1.1844`,1.0809`,0.2052`,-2.4696`,-0.0322`,0.4507`,-0.1799`,-0.629`,0.6218`,0.4889`,-0.2252`,-0.533`,-1.5015`,-0.0734`,-0.0784`,0.3451`,0.9701`,0.1536`,-0.0361`,0.03`,0.4442`,-0.0721`,0.4742`,-0.0422`,0.4496`,-0.0118`,0.096`,0.5707`,0.7185`,-0.544`,-0.438`,0.6083`,0.663`,-0.1273`,0.2383`,0.3907`,0.0515`,0.4718`,0.4943`,-0.2035`,-0.2039`,0.5859`,0.9252`,-0.1467`,-0.0638`,0.1412`,0.5577`,0.2701`,0.7129`,0.3179`,0.2774`,-0.2207`,-0.1856`,-0.4795`,0.4781`,0.0609`,0.119`,0.1479`,0.7176`,-0.2108`,-0.2775`,-0.1813`,0.3976`,-0.0106`,0.4138`,0.6865`,-0.2497`,-0.1405`,0.2685`,-0.0275`,0.7167`,0.3485`,0.5082`,-0.5171`,0.2466`,-0.1609`,-0.2539`,0.039`,0.6563`,0.8522`,-0.0539`,-0.2266`,0.6042`,-0.3203`,0.0752`,0.3231`,0.2647`,0.7167`,0.1892`,-0.6538`,0.102`,0.655`,0.3913`,-0.03`,-0.0626`,0.589`,0.16`,-0.1485`,-0.0679`,0.403`,-0.4653`,-0.2162`,0.5989`,-0.142`,0.4818`,0.2361`,-0.1362`,-0.0679`,0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.7543`,0.4204`,2.487`,1.0099`,1.3026`,0.9404`,0.6774`,0.8916`}

then i put together this data

eaaAgilenBtb = Transpose[{eaBTBD3, eaAGILENT}];

after that i create an associated data, made the predictor and the training set and test set

asoeaaAgilenBtb = MapThread[Rule, eaaAgilenBtb // Transpose];

peaAgilenBtb = Predict[asoeaaAgilenBtb]

aleatoeaAgilenBtb = 
  RandomSample[
   asoeaaAgilenBtb];(*elemetos aleatorios de asoeaaAgilenBtb*)

traineaAgilenBtb = 
  aleatoeaAgilenBtb[[
   241 ;;]];(*los ultimos 240 de los elemetos aleotorizados*)

testeaAgilenBtb = 
  aleatoeaAgilenBtb[[;; 
    240]];(*los primeros 964 de los elemetos aleotorizados. No se \
porque funciono al poner el numro 241*)

Intersection[traineaAgilenBtb, testeaAgilenBtb]

{}

peaAgilenBtbTest = Predict[traineaAgilenBtb]

But the ComparisonPlot and the data is never the same or even similar when i reevaluete the data

comparaaAgilenBtb = 
 PredictorMeasurements[peaAgilenBtbTest, testeaAgilenBtb]
comparaaAgilenBtb["ComparisonPlot"]

here some examples of the ComparisonPlots

enter image description here enter image description here

the Plots shows different results, also

Show[Plot[{
   peaAgilenBtbTest[x],
   peaAgilenBtbTest[x] + 
    StandardDeviation[peaAgilenBtbTest[x, "Distribution"]],
   peaAgilenBtbTest[x] - 
    StandardDeviation[peaAgilenBtbTest[x, "Distribution"]]},
  {x, -2, 3}, PlotStyle -> {Blue, Gray, Gray}, Filling -> {2 -> {3}}, 
  Exclusions -> None, 
  PlotLegends -> Placed[{"Prediction", "Confidence Interval"}, Above],
   PlotRange -> {{-2, 3}, {-4, 4}}, Frame -> True, 
  FrameLabel -> {"BTBD3", "Agilen"}, PlotLabel -> ""], 
 ListPlot[List @@@ asoeaaAgilenBtb, PlotStyle -> Red, 
  PlotLegends -> Placed[{"Data"}, Above]], BaseStyle -> 13]

here some examples.

enter image description here

and when i reevaluate

I think it's overfitted this time. enter image description here

So, i would like to know if there is something wrong whit my work flow or it something else, i will appreciate any advice

Attachments:
POSTED BY: Oscar Rodriguez
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