Question

我有一个Excel文件，其中包括预测变量和目标/响应数据。我将目标称为“ NEAR”，每个预测变量都有其自己的名称。为了研究特征选择，我使用了这段代码，但是出了点问题，我无法意识到每个预测变量对目标的影响。我写的代码如下。所有帮助将不胜感激。

 <modelVersion>4.0.0</modelVersion>

    <groupId>com.baeldung.keycloak</groupId>
    <artifactId>E-Services-Portal</artifactId>
    <packaging>war</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.keycloak.bom</groupId>
                <artifactId>keycloak-adapter-bom</artifactId>
                <version>3.3.0.Final</version>
                <type>pom</type>
                <scope>provided</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-security</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
                <scope>provided</scope>
            </dependency>

            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-oauth2-client</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
                <exclusions>
                    <exclusion>
                        <groupId>org.junit.vintage</groupId>
                        <artifactId>junit-vintage-engine</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>

            <dependency>
                <groupId>org.apache.tomcat.embed</groupId>
                <artifactId>tomcat-embed-jasper</artifactId>
                <scope>provided</scope>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <scope>provided</scope>
            </dependency>
            <dependency>
                <groupId>org.glassfish.web</groupId>
                <artifactId>el-impl</artifactId>
                <version>2.2</version>
            </dependency>
            <dependency>
                <groupId>org.axonframework</groupId>
                <artifactId>axon-spring-boot-starter</artifactId>
                <version>3.4</version>
            </dependency>
        </dependencies>


    <repositories>
        <repository>
            <id>central</id>
            <name>Maven Plugin Repository</name>
            <url>https://repo.maven.apache.org/maven2</url>
            <layout>default</layout>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
            <releases>
                <updatePolicy>never</updatePolicy>
            </releases>
        </repository>

    </repositories>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <executable>true</executable>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.2.3</version>
                <configuration>
                    <webappDirectory>/sample/servlet/container/deploy/directory</webappDirectory>
                </configuration>
            </plugin>
        </plugins>
    </build>

但是我发现了这个错误

spring-boot-starter-security

Answer 1

似乎是问题所在（与您发布的代码不同）在行中：

cor_target = abs(cor[y])

您似乎已更改为：

cor_target = abs(cor["NEAR"])

代码的问题是您要传递变量y，该变量用作数据帧cor的数组。执行此操作时，pandas尝试选择值等于数组y的列名。这意味着它将搜索不存在的名为-0.00398046, 0.00205926, -0.00304156等的列，因此会出现错误。

在目标变量为NEAR的情况下，您的新代码应该可以使用。

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