Question

我正在尝试使用几种技术在python中执行功能选择。我尝试应用的第一种技术是仅使用各种功能来选择功能。我的代码如下：

def feature_selection_technique(train, test, lbls, technique):
   if technique == "variance":
        sel = VarianceThreshold(threshold=(0.00010 * (1 - .15)))
        model1 = sel1.fit_transform(face_train)
        new_train = model1.transform(train)
        new_test = model1.transform(test)

    return new_train, new_test

实际上，我想使用训练数据集计算所选要素，然后将其应用于测试数据集。在这种情况下，似乎无法改变转换方法。在那种情况下我该怎么办？

Answer 1

我认为您使用的语法存在问题。请参阅文档和示例here。正确的语法如下：

> Uncaught Error: Unexpected value 'PropDecoratorFactory' imported by the module 'AppModule'. Please add a @NgModule annotation.
    at syntaxError (compiler.es5.js:1689)
    at compiler.es5.js:15373
    at Array.forEach (<anonymous>)
    at CompileMetadataResolver.getNgModuleMetadata (compiler.es5.js:15356)
    at JitCompiler._loadModules (compiler.es5.js:26679)
    at JitCompiler._compileModuleAndComponents (compiler.es5.js:26652)
    at JitCompiler.compileModuleAsync (compiler.es5.js:26581)
    at PlatformRef_._bootstrapModuleWithZone (core.es5.js:4595)
    at PlatformRef_.bootstrapModule (core.es5.js:4581)
    at Object.107 (main.ts:10)

也就是说，您应该初始化



    import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';
    import { FormsModule } from '@angular/forms';
    import { HttpModule } from '@angular/http';
    import { Input } from '@angular/core';
    import { ViewChild } from '@angular/core';
    import { Output } from '@angular/core';
    import { AppComponent } from './app.component';
    import { HeaderComponent } from './header/header.component';
    import { PlayersBoardComponent } from './players-board/players-board.component';
    import { PlayerComponent } from './players-board/player/player.component';
    import { ScoresComponent } from './players-board/scores/scores.component';
    import { CopmPlayerComponent } from './players-board/copm-player/copm-player.component';

    @NgModule({
      declarations: [
        AppComponent,
        HeaderComponent,
        PlayersBoardComponent,
        PlayerComponent,
        ScoresComponent,
      ],
      imports: [
        BrowserModule,
        FormsModule,
        HttpModule,
        ViewChild
      ],
      providers: [],
      bootstrap: [AppComponent]
    })
    export class AppModule { }

，然后将其拟合到训练数据并对其进行转换，然后转换测试数据。

python中的特征选择

1 个答案: