Scrub Fast Tree Family by wschin · Pull Request #2753 · dotnet/machinelearning

wschin · 2019-02-27T01:37:10Z

This PR fixes #2617 (also fixes #2375, fixes #2857) and is also a part of #2613.

Cleaned items:

FastTree.cs
FastTreeArguments.cs
Derived fast tree classes
Gam family

wschin · 2019-02-27T01:38:13Z

docs/samples/Microsoft.ML.Samples/Dynamic/FastTreeRegression.cs

-            // Use the path object to pass to GetLeaf, which will populate path with the IDs of th nodes from root to leaf.
-            List<int> path = default;
-            // Get the ID of the leaf this example ends up in tree 0.
-            var leafID = modelParams.GetLeaf(0, in testRow, ref path);


Removed because our public APIs doesn't provide those functions. #Resolved

But you can still traverse through trees with new structure, right?

In reply to: 260562343 [](ancestors = 260562343)

No, we cannot but this definitely should be hidden here. @[email protected], do you think this feature is required in tree's public APIs?

In reply to: 261011054 [](ancestors = 261011054,260562343)

I think the trees should enable someone to explain what the tree is. I wouldn't make evaluation code part of the API. Any more than we insist that linear model parameters expose "do dot product" as a method on the model parameters. Both things are potentially useful of course, but we don't need it as part of our public API (at least at first).

In reply to: 261417026 [](ancestors = 261417026,261011054,260562343)

Sounds good. I feel evaluation module should be independent to the expression of the trained objects. Thanks you!

In reply to: 261734289 [](ancestors = 261734289,261417026,261011054,260562343)

Ivanidzo4ka · 2019-02-27T01:40:27Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

-        [Argument(ArgumentType.LastOccurenceWins, HelpText = "The seed of the random number generator", ShortName = "r1")]
-        public int RngSeed = 123;
+        [Argument(ArgumentType.LastOccurenceWins, HelpText = "The seed of the random number generator", ShortName = "r1,RngSeed")]
+        public int RandomSeed = 123;


RandomSeed [](start = 19, length = 10)

I think everywhere else we call it just seed. #Resolved

Sure.

In reply to: 260562756 [](ancestors = 260562756)

Ivanidzo4ka · 2019-02-27T01:40:56Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

+        [Argument(ArgumentType.LastOccurenceWins, HelpText = "The seed of the active feature selection", ShortName = "r3,FeatureSelectSeed", Hide = true)]
        [TGUI(NotGui = true)]
-        public int FeatureSelectSeed = 123;
+        public int FeatureSelectionRandomSeed = 123;


FeatureSelectionRandomSeed [](start = 19, length = 26)

Do we really need two of them? #Resolved

Kind of. There are two degrees of control that internal people wanted to independently vary or not vary: selection of features and selection of data. I have not kept touch with this set of people over the years but the reasoning at one point was definitely considered important. Let us not change it. #Resolved

Yes sir.

In reply to: 260863640 [](ancestors = 260863640)

Ivanidzo4ka · 2019-02-27T01:41:32Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

-        [Argument(ArgumentType.LastOccurenceWins, HelpText = "Minimum categorical docs percentage in a bin to consider for a split.", ShortName = "mdop")]
-        public double MinDocsPercentageForCategoricalSplit = 0.001;
+        [Argument(ArgumentType.LastOccurenceWins, HelpText = "Minimum categorical docs percentage in a bin to consider for a split.", ShortName = "mdop,MinDocsPercentageForCategoricalSplit")]
+        public double MinExamplePercentageForCategoricalSplit = 0.001;


Min [](start = 22, length = 3)

Minimum #Resolved

Ivanidzo4ka · 2019-02-27T01:42:39Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

-        [Argument(ArgumentType.LastOccurenceWins, HelpText = "Minimum categorical docs percentage in a bin to consider for a split.", ShortName = "mdop")]
-        public double MinDocsPercentageForCategoricalSplit = 0.001;
+        [Argument(ArgumentType.LastOccurenceWins, HelpText = "Minimum categorical docs percentage in a bin to consider for a split.", ShortName = "mdop,MinDocsPercentageForCategoricalSplit")]
+        public double MinExamplePercentageForCategoricalSplit = 0.001;


0.001 [](start = 64, length = 5)

is it 0.001% or 0.1% ? #Resolved

0.1%. Docs are updated to all Percentage and Fraction arguments.

In reply to: 260563129 [](ancestors = 260563129)

wschin · 2019-02-27T01:42:51Z

src/Microsoft.ML.FastTree/FastTree.cs

+        /// <summary>
+        /// Copy the weights of all training features to <paramref name="weights"/>.
+        /// </summary>
+        public void GetFeatureWeights(ref VBuffer<float> weights)


Not sure if this should return IReadOnlyList<float>.

Ivanidzo4ka · 2019-02-27T01:43:53Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

-        [Argument(ArgumentType.LastOccurenceWins, HelpText = "Maximum number of distinct values (bins) per feature", ShortName = "mb")]
-        public int MaxBins = 255;  // save one for undefs
+        [Argument(ArgumentType.LastOccurenceWins, HelpText = "Maximum number of distinct values (bins) per feature", ShortName = "mb,MaxBins")]
+        public int MaxBinCountPerFeature = 255;  // save one for undefs


Max [](start = 19, length = 3)

Maximum #Resolved

Ivanidzo4ka · 2019-02-27T01:44:38Z

    /// Print execution time breakdown to stdout.

are we really print into stdout or we use our logging mechanism? #Resolved

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:301 in 3257470. [](commit_id = 3257470, deletion_comment = False)

Ivanidzo4ka · 2019-02-27T01:45:48Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

+        public Double FeatureFractionPerSplit = 1;

        /// <summary>
        /// Smoothing paramter for tree regularization.


paramter [](start = 22, length = 8)

parameter #Resolved

Ivanidzo4ka · 2019-02-27T01:46:58Z

    public bool PrintTrainValidGraph;

is this remnants of TLC TV ?
Do we need to expose them? #Resolved

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:410 in d64a4ae. [](commit_id = d64a4ae, deletion_comment = False)

TomFinley · 2019-02-27T17:39:55Z

    public bool PrintTrainValidGraph;
is this remnants of TLC TV ?
Do we need to expose them?

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:410 in d64a4ae. [](commit_id = d64a4ae, deletion_comment = False)

It has nothing to do with TLC TV. It is however important for command line applications, less so for API. Let us make internal for now. #Resolved

Ivanidzo4ka · 2019-02-28T01:10:31Z

    public RegressionTreeEnsemble TrainedTreeEnsemble { get; }

I've looked into RegressionTree.cs and some things like:
NumLeaves, NumNodes, GtChild, LteChild doesn't sound like great names
Shall we address that in this PR as well? #Resolved

Refers to: src/Microsoft.ML.FastTree/FastTree.cs:3393 in 3257470. [](commit_id = 3257470, deletion_comment = False)

wschin · 2019-02-28T23:14:39Z

    public RegressionTreeEnsemble TrainedTreeEnsemble { get; }

Fixed as well. Feel strange if they are in two PRs.

In reply to: 468095313 [](ancestors = 468095313)

Refers to: src/Microsoft.ML.FastTree/FastTree.cs:3393 in 3257470. [](commit_id = 3257470, deletion_comment = False)

wschin · 2019-02-28T23:40:38Z

    public bool PrintTrainValidGraph;

I will do internal-best-friend.

In reply to: 467689803 [](ancestors = 467689803)

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:410 in d64a4ae. [](commit_id = d64a4ae, deletion_comment = False)

wschin · 2019-02-28T23:41:03Z

Sure.

In reply to: 467958748 [](ancestors = 467958748)

wschin · 2019-02-28T23:46:06Z

    /// Print execution time breakdown to stdout.

We use ch defined in

           using (var ch = Host.Start("Training"))
            {
                ch.CheckValue(trainData, nameof(trainData));
                trainData.CheckBinaryLabel();
                trainData.CheckFeatureFloatVector();
                trainData.CheckOptFloatWeight();
                FeatureCount = trainData.Schema.Feature.Value.Type.GetValueCount();
                ConvertData(trainData);
                TrainCore(ch);
            }

In reply to: 467689294 [](ancestors = 467689294)

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:301 in d64a4ae. [](commit_id = d64a4ae, deletion_comment = False)

singlis · 2019-03-01T01:57:24Z

src/Microsoft.ML.Data/Prediction/Calibrator.cs

 using Microsoft.ML.CommandLine;
 using Microsoft.ML.Data;
 using Microsoft.ML.EntryPoints;
-using Microsoft.ML.Internal.Internallearn;


Are you merged with master? I thought that InternalLearn was removed in a prior change. #Resolved

Yep, maybe rebase did something.

In reply to: 261456781 [](ancestors = 261456781)

singlis · 2019-03-01T01:59:24Z

            bestIteration = Ensemble.NumTrees;

Changing this to NumberOfTrees is probably out of scope for this PR right? #Resolved

Refers to: src/Microsoft.ML.FastTree/BoostingFastTree.cs:143 in 3257470. [](commit_id = 3257470, deletion_comment = False)

wschin · 2019-03-01T02:00:10Z

            bestIteration = Ensemble.NumTrees;

Let me double-check. Thanks!

In reply to: 468512482 [](ancestors = 468512482)

Refers to: src/Microsoft.ML.FastTree/BoostingFastTree.cs:143 in 3257470. [](commit_id = 3257470, deletion_comment = False)

singlis · 2019-03-01T02:05:05Z

        string featureColumn,

suggestion:
I know this constructor is not exposed publicly, but I renamed these parameters (featureColumn->featureColumnName, etc) in lightgbm so that they aligned with the parameters that are used in the catalog function. And technically they will align with the parameters in the Options class. #Resolved

Refers to: src/Microsoft.ML.FastTree/FastTree.cs:104 in 3257470. [](commit_id = 3257470, deletion_comment = False)

singlis · 2019-03-01T02:17:20Z

src/Microsoft.ML.FastTree/FastTree.cs


+        /// <summary>
+        /// Copy the weights of all training features to <paramref name="weights"/>.
+        /// </summary>


</ [](start = 12, length = 2)

Missing pararm for weights #Resolved

Thanks. I will add

/// <param name="weights">a <see cref="VBuffer{T}"/> where feature weights would be assigned to. /// The i-th element in <paramref name="weights"/> stores the weight of the i-th feature.</param>

In reply to: 261459910 [](ancestors = 261459910)

singlis · 2019-03-01T02:28:52Z

src/Microsoft.ML.FastTree/FastTreeClassification.cs

-            int numTrees = Defaults.NumTrees,
-            int minDatapointsInLeaves = Defaults.MinDocumentsInLeaves,
-            double learningRate = Defaults.LearningRates)
+            int numLeaves = Defaults.NumberOfLeaves,


numLeaves [](start = 16, length = 9)

same suggestion here to use the full names for the arguments. #Resolved

Sure.

In reply to: 261461521 [](ancestors = 261461521)

singlis · 2019-03-01T02:40:02Z

    internal BinaryClassificationGamTrainer(IHostEnvironment env, Options options)

Should this be renamed to GamBinaryClassificationTrainer? I know there is an issue that is tracking consistent naming with our algorithms, so probably not worth doing in this pr.
#WontFix

Refers to: src/Microsoft.ML.FastTree/GamClassification.cs:52 in 3257470. [](commit_id = 3257470, deletion_comment = False)

singlis · 2019-03-01T02:46:07Z

        /// wrong, this method will throw.

I dont think this comment is right - this doesnt look like it will throw. #Resolved

Refers to: src/Microsoft.ML.FastTree/GamModelParameters.cs:865 in 3257470. [](commit_id = 3257470, deletion_comment = False)

singlis · 2019-03-01T02:53:28Z

src/Microsoft.ML.StaticPipe/TreeTrainersStatic.cs

-            int numTrees = Defaults.NumTrees,
-            int minDatapointsInLeaves = Defaults.MinDocumentsInLeaves,
-            double learningRate = Defaults.LearningRates,
+            int numLeaves = Defaults.NumberOfLeaves,


numLeaves [](start = 16, length = 9)

Shouldnt these parameters also be fully named? #Resolved

Thanks! I didn't realize they are FastTree static APIs.

In reply to: 261464899 [](ancestors = 261464899)

Ivanidzo4ka · 2019-03-02T06:22:07Z

src/Microsoft.ML.FastTree/RegressionTree.cs

        /// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/operators/bitwise-complement-operator.
        /// </summary>
-        public IReadOnlyList<int> LteChild => _lteChild;
+        public IReadOnlyList<int> LessThanOrEqualToThresholdChildren => _lteChild;


LessThanOrEqualToThresholdChildren [](start = 34, length = 34)

It looks like across lightgbm, catboost and whatever they use in scikit this one called: leftChildrends, or leftChild, another one is rightChild. #Resolved

Will do leftChild for this.

In reply to: 261814959 [](ancestors = 261814959)

wschin · 2019-03-04T16:37:47Z

        public int LambdaMartMaxTruncation = 100;

I think so. Can we remove "k" in top-k accuracy? No, we can't.

In reply to: 468890315 [](ancestors = 468890315)

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:93 in ee67d50. [](commit_id = ee67d50, deletion_comment = False)

wschin · 2019-03-04T21:10:50Z

        // REVIEW: Hiding sorting for now. Should be an enum or component factory.

Will make it internal.

In reply to: 468890113 [](ancestors = 468890113)

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:83 in ee67d50. [](commit_id = ee67d50, deletion_comment = False)

wschin · 2019-03-04T21:11:58Z

        public bool DistanceWeight2;

As suggested by @[email protected], this will be internal.

In reply to: 468890167 [](ancestors = 468890167)

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:105 in ee67d50. [](commit_id = ee67d50, deletion_comment = False)

wschin · 2019-03-04T21:12:33Z

        public string CustomGains = "0,3,7,15,31";

Will be included in the next iteration. (iter 9)

In reply to: 468890070 [](ancestors = 468890070)

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:78 in ee67d50. [](commit_id = ee67d50, deletion_comment = False)

Ivanidzo4ka · 2019-03-04T23:51:52Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

                ectx.CheckUserArg(0 <= secondaryMetricShare && secondaryMetricShare <= 1, "secondaryMetricShare", "secondaryMetricShare must be between 0 and 1.");
 #endif
-                ectx.CheckUserArg(0 < LambdaMartMaxTruncation, nameof(LambdaMartMaxTruncation), "lambdaMartMaxTruncation must be positive.");
+                ectx.CheckUserArg(0 < NdcgTruncationLevel, nameof(NdcgTruncationLevel), "lambdaMartMaxTruncation must be positive.");


lambdaMartMaxTruncation [](start = 89, length = 23)

no need for this one. you already use nameof #Resolved

Ivanidzo4ka · 2019-03-04T23:58:32Z

src/Microsoft.ML.FastTree/FastTreeArguments.cs

+            /// <summary>
+            /// Early stopping metrics.
+            /// </summary>
+            public EarlyStoppingMetric EarlyStoppingMetric


EarlyStoppingMetric [](start = 19, length = 19)

From comments for previous option it looks like it should be applicable only for regression and ranking problem. Does it actually works for binary classification? #Pending

I don't exactly know but conceptually yes. It can be used to measure gradient norm.

In reply to: 262295829 [](ancestors = 262295829)

Ivanidzo4ka · 2019-03-05T00:02:59Z

    public int EarlyStoppingMetrics;

internal. otherwise i would see two places in which I can set this up. this one and EarlyStoppingMetric #Resolved

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:633 in 157aedc. [](commit_id = 157aedc, deletion_comment = False)

Ivanidzo4ka · 2019-03-05T00:10:30Z

    public string BaselineScoresFormula;

make this one internal and next two below it.
In order to work with FreeForms we need to ship "NeuralTreeEvaluator.dll" which we can't expose. #Resolved

Refers to: src/Microsoft.ML.FastTree/FastTreeArguments.cs:737 in 157aedc. [](commit_id = 157aedc, deletion_comment = False)

ganik · 2019-03-05T20:20:37Z

test/BaselineOutput/Common/EntryPoints/core_manifest.json

        },
-        {
-          "Name": "MaxTreesAfterCompression",
-          "Type": "Int",


why this got deleted? #Resolved

Not used at all.

In reply to: 262674075 [](ancestors = 262674075)

…otnet#2613

Ivanidzo4ka

wschin added the API Issues pertaining the friendly API label Feb 27, 2019

wschin self-assigned this Feb 27, 2019

wschin commented Feb 27, 2019

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wschin force-pushed the scrub-tree branch from d8957fd to aa0b9c2 Compare February 27, 2019 20:59

wschin changed the title ~~[WIP] Scrub Fast Tree Family~~ Scrub Fast Tree Family Feb 28, 2019

wschin force-pushed the scrub-tree branch from eaaa8f4 to e6aa43d Compare March 1, 2019 00:07

singlis reviewed Mar 1, 2019

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Ivanidzo4ka reviewed Mar 2, 2019

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Ivanidzo4ka reviewed Mar 4, 2019

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ganik reviewed Mar 5, 2019

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Ivanidzo4ka mentioned this pull request Mar 5, 2019

GAM parameter names are non-standard #2857

Closed

wschin added 12 commits March 5, 2019 13:20

Clean FastTree.cs and FastTreeArguments.cs following instructions in d…

38e03c4

…otnet#2613

Go through all places once

099768d

Address comments

b90dcd3

Address comments and update entry-point catalog

ab58a46

Update F# tests

01d6830

Address comments

f323b00

Address comments

8d27bab

Remove extra short names for entry point BC

dd3c8a2

Address some comments

e9745b6

Improve early-stopping metric field

8e93762

Update entry points

004d4cc

Address comments

1b4474c

wschin force-pushed the scrub-tree branch from 157aedc to 1b4474c Compare March 5, 2019 21:21

Ivanidzo4ka approved these changes Mar 5, 2019

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wschin merged commit 95019e5 into dotnet:master Mar 5, 2019

wschin deleted the scrub-tree branch March 5, 2019 22:18

Ivanidzo4ka mentioned this pull request Mar 8, 2019

FastTree EarlyStoppingMetric is an int but only accepts specific values #2521

Closed

daholste mentioned this pull request Mar 25, 2019

Cannot access leaf nodes of trained trees #3083

Closed

ghost locked as resolved and limited conversation to collaborators Mar 24, 2022

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