• One-Way ANOVA Analysis of Variance Procedure Duncan's Multiple Range Test for variable: YIELD NOTE: This test controls the t...


One-Way ANOVA

Analysis of Variance Procedure

Duncan's Multiple Range Test for variable: YIELD

NOTE: This test controls the type I comparisonwise error rate,
not

the
experimentwise error rate

Alpha= 0.05  df= 8  MSE=
0.004117

Number of Means
2
3
4

Critical Range  .1208 .1259
.1287

Means with the same letter are not significantly
different.

Duncan Grouping
Mean
N
DATE

A
0.37000
3
1

B
0.19667
3
2

B

C
B
0.12667
3
3

C

C
0.03000
3
4

对于方差分析表中各项内容的含义，在“SAS程序及释义”部分已经做了详细解释，这里不再重复。如果有不明白的地方，请复习“SAS程序及释义”的相关内容。
SAS分析结果指出，不同播种期其产量差异极显著。多重比较表明，2和3间差异不显著，3和4间差异不显著，1和其他各组间差异都显著。以上结果可以归纳成下表。

变差来源

平方和

自由度

均方

F

P

播期间

0.185 158 33

3

0.061 719 44

14.99

0.001 2

重复间

0.032 933 33

8

0.004 116 67

总
和

0.218 091 67

11

多重比较：

1

2

3

4


展开全文
• 2、变型（variance）:类或特质的类型参数可以用变型标注{Scala中协变(+)、逆变(-)、上界(<:)、下界(>:) 简单介绍) 看源码的时候看到： trait ExtensionId[T <: Extension] { 没见过这个符号啊<: 1...
1、生成（yield）：表达式可以生成结果。yield关键字标示了for表达式的结果。

2、变型（variance）:类或特质的类型参数可以用变型标注{Scala中协变(+)、逆变(-)、上界(<:)、下界(>:) 简单介绍)

看源码的时候看到：

trait ExtensionId[T <: Extension] {

没见过这个符号啊<:

1） U >: T

这是类型下界的定义，也就是U必须是类型T的父类(或本身，自己也可以认为是自己的父类)。

2) S <: T

这是类型上界的定义，也就是S必须是类型T的子类（或本身，自己也可以认为是自己的子类)。

然后scala中的泛型符号是[T]，而不是Java中的<T>.

tarit Person[+T]{} --协变，在这种情况下，假设S类型是A类型的子类，则Person[S]类型可泛化成Person[T]的子类，也就是被参数化类型的泛化方向与参数类型的方向是一致的，所以称为协变。

tarit Person[-T]{}  --逆变，这种情况下，当类型S是类型A的子类型，则Person[A]反过来可以认为是Person[S]的子类型。也就是被参数化类型的泛化方向与参数类型的方向是相反的，所以称为逆变

3、变量(variable)：指向对象的具名实体，变量要么是val,要么是var。它们必须在定义的时候被初始化，但只有var可以在之后重新赋值以指向不同的对象。

4、值类型（value type）:值类型是指AnyVal的任意子类，如Int、Double或Unit。这个术语在scala源代码级别有意义，在运行时相应java原始类型实例，如java.lang.Integer在值类型实例的整个生命周期中，运行时，可能会把它们的原始类型和包装类型之间前后转换。

5、值（value）.任何计算或表达式的结果在scala里都有值，并且，scala里的所有值都是对象，值这个术语在本质上是指对象在内存中镜像。

6、代数数据类型：通过提供若干含有独立构造器的备选项定义的类型。通常可以辅助于通过模式匹配解构类型的方式。这个概念可以在规约语言和函数式编程语言中发现。代数类型在scala可以及用样本类（case classs）模拟。

7、备选项（alternative）.match 表达式的分支，形式为 case pattern=>expression 备选项的别名是样本 case

8、注解（annoation）。注解出现在源代码中，并被附加在某个语法部分上。注解可以用计算机处理，所以你可以用它们有效地添加scala的扩展。

9、匿名类（anonymous class）.匿名类是由scala编译器通过类或特质trait 跟花括号内new表达式生成合成子类。花括号包含了匿名子类的类结构类。可惟为空，然而，如果new后面的名称指向的特质或类包含了抽象成员。


展开全文
• <div><p>The divide ... which was modified to allow a variance of ~1 ULP, but which should in theory yield the same result for the two cases.</p><p>该提问来源于开源项目：dotnet/runtime</p></div>
• The differences start at the third digit after decimal and yield ~0.1mm variance in the specific area of interest. While this is insignificant with respect to the expected accuracy of the ...
• One-Way ANOVA     Analysis of Variance Procedure     Duncan's Multiple Range Test for variable: YIELD     NOTE: This test contro...


One-Way ANOVA

Analysis of Variance Procedure

Duncan's Multiple Range Test for variable: YIELD

NOTE: This test controls the type I comparisonwise error rate,
not

the
experimentwise error rate

Alpha= 0.05  df= 8  MSE=
0.004117

Number of Means
2
3
4

Critical Range  .1208 .1259
.1287

Means with the same letter are not significantly
different.

Duncan Grouping
Mean
N
DATE

A
0.37000
3
1

B
0.19667
3
2

B

C
B
0.12667
3
3

C

C
0.03000
3
4

对于方差分析表中各项内容的含义，在“SAS程序及释义”部分已经做了详细解释，这里不再重复。如果有不明白的地方，请复习“SAS程序及释义”的相关内容。
SAS分析结果指出，不同播种期其产量差异极显著。多重比较表明，2和3间差异不显著，3和4间差异不显著，1和其他各组间差异都显著。以上结果可以归纳成下表。

变差来源

平方和

自由度

均方

F

P

播期间

0.185 158 33

3

0.061 719 44

14.99

0.001 2

重复间

0.032 933 33

8

0.004 116 67

总
和

0.218 091 67

11

多重比较：

1

2

3

4


展开全文
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