r求矩阵某一列的标准偏差

2023-10-08 12:12| 来源: 网络整理| 查看: 265

r求矩阵某一列的标准偏差

Being a statistical language, R offers standard function sd(‘ ‘) to find the standard deviation of the values.

作为一种统计语言，R提供标准函数sd（''）以查找值的标准偏差。

那么标准偏差是多少？ (So what is the standard deviation? ) ‘Standard deviation is the measure of the dispersion of the values’.

“标准偏差是对数值离散度的度量”。 The higher the standard deviation, the wider the spread of values.

标准偏差越高，值的分布范围越广。 The lower the standard deviation, the narrower the spread of values.

标准偏差越低，值的分布范围越窄。 In simple words the formula is defined as – Standard deviation is the square root of the ‘variance’.

简单来说，公式定义为：- 标准偏差是“方差”的平方根。标准偏差的重要性 (Importance on Standard deviation)

Standard deviation is very popular in the statistics, but why? the reasons for its popularity and its importance are listed below.

标准差在统计数据中非常流行，但是为什么呢？下面列出了其受欢迎程度和重要性的原因。

Standard deviation converts the negative number to a positive number by squaring it.

标准偏差通过平方将负数转换为正数。 It shows the larger deviations so that you can particularly look over them.

它显示了较大的偏差，因此您可以特别查看它们。 It shows the central tendency, which is a very useful function in the analysis.

它显示了集中趋势，这在分析中非常有用。 It has a major role to play in finance, business, analysis, and measurements.

它在财务，业务，分析和度量中起着重要作用。

Before we roll into the topic, keep this definition in your mind!

在进入主题之前，请牢记此定义！

Variance – It is defined as the squared differences between the observed value and expected va

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