title: [概率论]3-8:随机变量函数(Functions of a Random Variable) categories: Mathematic Probability keywords: The Probability Integral Transformation 概率积分变换 Simulation 仿真 Pseudo-Random Numbers 伪随机数 General Function toc: true date: 2018-03-16 09:49:24 Abstract:
title: [概率论]3-9:多随机变量函数(Functions of Two or More Random Variables) categories: - Mathematic - Probability keywords: - Convolution - 卷积 toc: true date: 2018-03-19 10:12:34 Abstract: 本文介绍多随机变量的函数 Keywords: 离散多随机变量的函数,连续多随机变量的函数,卷积 开篇废话 任何一个领域的顶级人才都是需要很
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概念: 下面是蛮经典的解释: What Good are Functions? You might have considered the situation where you would like to reuse a piece of code, just with a few different values. Instead of rewriting the whole code, it's much cleaner to define a function, which can
0和#都是占位符,但在不同的地方,作用不一样0: 比实际数字的位数多,不足的地方用0补上. new DecimalFormat("00.00").format(3.14) //结果:03.14 new DecimalFormat("0.000").format(3.14) //结果: 3.140 new DecimalFormat("00.000").format(3.14) //结果:03.140 比实际数字的位数少:整数部分不改动,小数部分,
self.orderCost.text = [NSStringstringWithFormat:@"%.1f元",self.order.cost.floatValue]; %.1f 表示小数点一位,%.2f 表示小数点2位,依次类推 格式定义The format specifiers supported by the NSString formatting methods and CFString formatting functions follow the IEEE printf
java保留两位小数问题: 方式一: 四舍五入 double f = 111231.5585; BigDecimal b = new BigDecimal(f); double f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); 保留两位小数 --------------------------------------------------------------- 方式二: java.text.DecimalFormat d