slice sampling
时间: 2023-11-27 19:01:36 浏览: 208
Slice sampling 是一种用于连续分布的贝叶斯推断的马尔可夫链蒙特卡洛方法。它通过在目标分布上进行水平切片来进行采样,而不需要提议分布。slice sampling的优点是其相对简单的实现和能够自适应地调整步长。它通常用于处理高维和复杂的分布,因为它不需要事先指定一个提议分布。
这种方法从一个随机的位置开始,在概率分布上的等高线上将其水平切分。然后在给定这个水平切片上采样。接着,更新参数并移动到下一个切片,直到获得所需数量的样本。因此slice sampling不需要指定提议分布,而是通过动态地切片来自适应地调整步长。
slice sampling的一个重要的应用是在贝叶斯统计推断中,它可以用来估计未知参数的后验分布。它也被用于机器学习和模式识别的问题中,如回归分析、聚类等方面。
总的来说,slice sampling是一种非常有用的概率推断方法,能够适应各种类型的分布,而不需要指定提议分布,因此得到了广泛的应用。
相关问题
将数组[ "GPPM:SAMPLING:SAMPLINGSETUP", "GPPM:SAMPLING:SAMPLINGSETUP:DELETE", "GPPM:SAMPLING:SAMPLINGSETUP:EXPORT", "GPPM:SAMPLING:SAMPLINGSETUP:HISTORY", "GPPM:SAMPLING:SAMPLINGSETUP:IMPORT", "GPPM:SAMPLING:SAMPLINGSETUP:QUERY", "GPPM:SAMPLING:SAMPLINGSETUP:SETUP", "GPPM:SAMPLING:SAMPLINGSETUP:SWITCH", "GPPM:SAMPLING:SAMPLINGSETUP:VIEW", "GPPM:SAMPLING:SAMPLINGSETUP:TARGETEQ", "GPPM:SAMPLING:SAMPLINGVIEW", "GPPM:SAMPLING:SAMPLINGVIEW:TARGETEQ", "GPPM:SABCLING:SAMPLINGVIEW", "GPPM:SABCLING:SAMPLINGVIEW:TARGETEQ", "GPPM:EFGLING:SAMPLINGVIEW", "GPPM:EFGLING:SAMPLINGVIEW:TARGETEQ", ]转化为[ "DELETE", "EXPORT", "HISTORY", "IMPORT", "QUERY", "SETUP", "SWITCH", "VIEW", "TARGETEQ", "TARGETEQ", "TARGETEQ", "TARGETEQ", ]
根据给定的数组,你想要将每个元素中的最后一个冒号后的子字符串提取出来,形成一个新的数组。以下是一个示例代码来实现这个转换:
```javascript
const array = [
"GPPM:SAMPLING:SAMPLINGSETUP",
"GPPM:SAMPLING:SAMPLINGSETUP:DELETE",
"GPPM:SAMPLING:SAMPLINGSETUP:EXPORT",
"GPPM:SAMPLING:SAMPLINGSETUP:HISTORY",
"GPPM:SAMPLING:SAMPLINGSETUP:IMPORT",
"GPPM:SAMPLING:SAMPLINGSETUP:QUERY",
"GPPM:SAMPLING:SAMPLINGSETUP:SETUP",
"GPPM:SAMPLING:SAMPLINGSETUP:SWITCH",
"GPPM:SAMPLING:SAMPLINGSETUP:VIEW",
"GPPM:SAMPLING:SAMPLINGSETUP:TARGETEQ",
"GPPM:SAMPLING:SAMPLINGVIEW",
"GPPM:SAMPLING:SAMPLINGVIEW:TARGETEQ",
"GPPM:SABCLING:SAMPLINGVIEW",
"GPPM:SABCLING:SAMPLINGVIEW:TARGETEQ",
"GPPM:EFGLING:SAMPLINGVIEW",
"GPPM:EFGLING:SAMPLINGVIEW:TARGETEQ"
];
const transformedArray = array.map(item => {
const lastIndex = item.lastIndexOf(':');
return item.slice(lastIndex + 1);
});
console.log(transformedArray);
```
这段代码将会输出转换后的数组:
```
[
"SAMPLINGSETUP",
"DELETE",
"EXPORT",
"HISTORY",
"IMPORT",
"QUERY",
"SETUP",
"SWITCH",
"VIEW",
"TARGETEQ",
"SAMPLINGVIEW",
"TARGETEQ",
"SAMPLINGVIEW",
"TARGETEQ",
"SAMPLINGVIEW",
"TARGETEQ"
]
```
在代码中,我们使用 `lastIndexOf` 方法找到每个元素中最后一个冒号的索引,然后使用 `slice` 方法将其后的子字符串提取出来。最后,我们使用 `map` 方法将转换后的结果存储在新的数组中。
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