这听起来可能很愚蠢!但是,我想找到任何简单的例子来引用! 有人可以举一个使用java打印混淆矩阵的例子吗?
类似这样的东西(输出):
p\a Head Tail
Head 1 4
Tail 4 1
假设HashMap中存储的数据是这样的
HashMap<String,Integer>
String = "Head, Tail"
Integer = 4
更新(示例代码):
public static void main(String[] args) {
HashMap<String,Integer> cmatrix = new HashMap<String,Integer>();
//the string part can hold more the 2 values, all separated with comma
cmatrix.put("tail, head", 1);
cmatrix.put("head ,tail", 4);
cmatrix.put("tail, tail", 1);
cmatrix.put("head, head", 4);
for (Map.Entry entry : cmatrix.entrySet()) {
System.out.println(entry.getKey() +" : "+entry.getValue());
}
}
谢谢!
最佳答案
为了简化代码,我们假设源数据中没有空格:
cmatrix.put("tail,head", 1);
cmatrix.put("head,tail", 4);
cmatrix.put("tail,tail", 1);
cmatrix.put("head,head", 4);
首先,我们需要收集类的名称:
Set<String> classNames = new HashSet<String>();
for(String key : cmatrix.keySet()) {
String[] classes = key.split(",");
if(classes != null && classes.length > 0) {
classNames.addAll(Arrays.asList(classes));
}
}
接下来,对类名进行排序:
List<String> sortedClassNames = new ArrayList<String>();
sortedClassNames.addAll(classNames);
Collections.sort(sortedClassNames);
然后打印出标题行。
System.out.print("p/a");
for(String predictedClassName : sortedClassNames) {
System.out.print("\t" + predictedClassName);
}
System.out.println();
然后打印出每一行:
for(String actualClassName : sortedClassNames) {
System.out.print(actualClassName);
for(String predictedClassName : sortedClassNames) {
Integer value = cmatrix.get(actualClassName + "," + predictedClassName);
System.out.print("\t");
if(value != null) {
System.out.print(value);
}
}
System.out.println();
}
我将把输出的“美化”作为读者的练习。
关于java - 用JAVA打印出混淆矩阵,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26856917/