C++ dvec_t类代码示例

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本文整理汇总了C++中dvec_t类的典型用法代码示例。如果您正苦于以下问题：C++ dvec_t类的具体用法？C++ dvec_t怎么用？C++ dvec_t使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了dvec_t类的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: auc

double auc(const dvec_t& dec_values, const ivec_t& ty){
	double roc  = 0;
	size_t size = dec_values.size();
	size_t i;
	std::vector<size_t> indices(size);

	for(i = 0; i < size; ++i) indices[i] = i;

	std::sort(indices.begin(), indices.end(), Comp(&dec_values[0]));

	int tp = 0,fp = 0;
	for(i = 0; i < size; i++) {
		if(ty[indices[i]] == 1) tp++;
		else if(ty[indices[i]] == -1) {
			roc += tp;
			fp++;
		}
	}

	if(tp == 0 || fp == 0)
	{
		fprintf(stderr, "warning: Too few postive true labels or negative true labels\n");
		roc = 0;
	}
	else
		roc = roc / tp / fp;

	printf("AUC = %g\n", roc);

	return roc;
}

开发者ID:Joelone，项目名称:MLEA，代码行数:31，代码来源:eval.cpp

示例2: bac

double bac(const dvec_t& dec_values, const ivec_t& ty){
	size_t size = dec_values.size();
	size_t i;
	int    tp, fp, fn, tn;
	double specificity, recall;
	double bac;

	tp = fp = fn = tn = 0;

	for(i = 0; i < size; ++i) 
		if(dec_values[i] >= 0 && ty[i] == 1) ++tp;
		else if(dec_values[i] >= 0 && ty[i] == -1) ++fp;
		else if(dec_values[i] <  0 && ty[i] == 1)  ++fn;
		else ++tn;

	if(tn + fp == 0){
		fprintf(stderr, "warning: No negative true label.\n");
		specificity = 0;
	}else
		specificity = tn / (double)(tn + fp);
	if(tp + fn == 0){
		fprintf(stderr, "warning: No positive true label.\n");
		recall = 0;
	}else
		recall = tp / (double)(tp + fn);

	bac = (specificity + recall) / 2;
	printf("BAC = %g\n", bac);
	
	return bac;
}

开发者ID:Joelone，项目名称:MLEA，代码行数:31，代码来源:eval.cpp

示例3: gmean

double gmean(const dvec_t& dec_values, const ivec_t& ty){
	size_t size = dec_values.size();
	size_t i;
	int    tp, fp, fn, tn;
	double specificity, recall;
	double gmean;

	tp = fp = fn = tn = 0;

	for(i = 0; i < size; ++i) 
		if(dec_values[i] >= 0 && ty[i] == 1) ++tp;
		else if(dec_values[i] >= 0 && ty[i] == -1) ++fp;
		else if(dec_values[i] <  0 && ty[i] == 1)  ++fn;
		else ++tn;

	if(tn + fp == 0){
		fprintf(stderr, "warning: No negative true label.\n");
		specificity = 0;
	}else
		specificity = tn / (double)(tn + fp);
	if(tp + fn == 0){
		fprintf(stderr, "warning: No positive true label.\n");
		recall = 0;
	}else
		recall = tp / (double)(tp + fn);

	gmean = sqrt(specificity * recall);
	printf("sensitivity = %g, specificity = %g, g-mean = %g\n", recall, specificity, gmean);
	
	return gmean;
}

开发者ID:dchao34，项目名称:bdtaunu，代码行数:31，代码来源:eval.cpp

示例4: bac

double bac(const dvec_t& dec_values, const ivec_t& ty){
	size_t size = dec_values.size();
	size_t i;
	int    tp, fp, fn, tn;
	double specificity, recall;
	double bac;

	tp = fp = fn = tn = 0;

	for(i = 0; i < size; ++i)
		if(dec_values[i] >= 0 && ty[i] == 1) ++tp;
		else if(dec_values[i] >= 0 && ty[i] == -1) ++fp;
		else if(dec_values[i] <  0 && ty[i] == 1)  ++fn;
		else ++tn;

	if(tn + fp == 0){
		fprintf(stderr, "warning: No negative true label.\n");
		specificity = 0;
	}else
		specificity = tn / (double)(tn + fp);
	if(tp + fn == 0){
		fprintf(stderr, "warning: No positive true label.\n");
		recall = 0;
	}else
		recall = tp / (double)(tp + fn);

	bac = (specificity + recall) / 2;
	// Precision and recall
	double pos_prec   = ((double)tp/(double)(tp + fp));
	double pos_rec    = ((double)tp/(double)(tp + fn));
	double pos_f1     = (2 * pos_prec * pos_rec) / (pos_prec + pos_rec);

	double neg_prec   = ((double)tn/(double)(tn + fn));
	double neg_rec    = ((double)tn/(double)(tn + fp));
	double neg_f1     = (2 * neg_prec * neg_rec) / (neg_prec + neg_rec);

	printf("Positive Male (+1) class:\n");
	printf("         TP = %d\n", tp );
	printf("         FN = %d\n", fn );
	printf("         FP = %d\n", fp );
	printf("         TN = %d\n", tn );
	printf("  precision = %g\n", pos_prec );
	printf("     recall = %g\n", pos_rec );
	printf("   F1 value = %g\n\n", pos_f1 );

	printf("Negative Female (-1) class:\n");
	printf("         TP = %d\n", tn );
	printf("         FN = %d\n", fp );
	printf("         FP = %d\n", fn );
	printf("         TN = %d\n", tp );
	printf("  precision = %g\n", neg_prec );
	printf("     recall = %g\n", neg_rec );
	printf("   F1 value = %g\n\n", neg_f1 );

	// printf("BAC = %g\n", bac);

	return bac;
}

开发者ID:sirty，项目名称:MaximumEntropyDemo，代码行数:58，代码来源:eval.cpp

示例5: precision

double precision(const dvec_t& dec_values, const ivec_t& ty){
	size_t size = dec_values.size();
	size_t i;
	int    tp, fp;
	double precision;

	tp = fp = 0;

	for(i = 0; i < size; ++i) if(dec_values[i] >= 0){
		if(ty[i] == 1) ++tp;
		else           ++fp;
	}

	if(tp + fp == 0){
		fprintf(stderr, "warning: No postive predict label.\n");
		precision = 0;
	}else
		precision = tp / (double) (tp + fp);
	printf("Precision = %g%% (%d/%d)\n", 100.0 * precision, tp, tp + fp);
	
	return precision;
}

开发者ID:Joelone，项目名称:MLEA，代码行数:22，代码来源:eval.cpp

示例6: recall

double recall(const dvec_t& dec_values, const ivec_t& ty){
	size_t size = dec_values.size();
	size_t i;
	int    tp, fn; // true_positive and false_negative
	double recall;

	tp = fn = 0;

	for(i = 0; i < size; ++i) if(ty[i] == 1){ // true label is 1
		if(dec_values[i] >= 0) ++tp; // predict label is 1
		else                   ++fn; // predict label is -1
	}

	if(tp + fn == 0){
		fprintf(stderr, "warning: No postive true label.\n");
		recall = 0;
	}else
		recall = tp / (double) (tp + fn);
	// print result in case of invocation in prediction
	printf("Recall = %g%% (%d/%d)\n", 100.0 * recall, tp, tp + fn);
	
	return recall; // return the evaluation value
}

开发者ID:Joelone，项目名称:MLEA，代码行数:23，代码来源:eval.cpp

示例7: fscore

double fscore(const dvec_t& dec_values, const ivec_t& ty){
	size_t size = dec_values.size();
	size_t i;
	int    tp, fp, fn;
	double precision, recall;
	double fscore;

	tp = fp = fn = 0;

	for(i = 0; i < size; ++i) 
		if(dec_values[i] >= 0 && ty[i] == 1) ++tp;
		else if(dec_values[i] >= 0 && ty[i] == -1) ++fp;
		else if(dec_values[i] <  0 && ty[i] == 1) ++fn;

	if(tp + fp == 0){
		fprintf(stderr, "warning: No postive predict label.\n");
		precision = 0;
	}else
		precision = tp / (double) (tp + fp);
	if(tp + fn == 0){
		fprintf(stderr, "warning: No postive true label.\n");
		recall = 0;
	}else
		recall = tp / (double) (tp + fn);

	
	if(precision + recall == 0){
		fprintf(stderr, "warning: precision + recall = 0.\n");
		fscore = 0;
	}else
		fscore = 2 * precision * recall / (precision + recall);

	printf("F-score = %g\n", fscore);
	
	return fscore;
}

开发者ID:Joelone，项目名称:MLEA，代码行数:36，代码来源:eval.cpp

注：本文中的dvec_t类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。