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How to force R to use a specified factor level as reference in a regression?

... See the relevel() function. Here is an example: set.seed(123) x <- rnorm(100) DF <- data.frame(x = x, y = 4 + (1.5*x) + rnorm(100, sd = 2), b = gl(5, 20)) head(DF) str(DF) m1 <- lm(y ~ x + b, data = DF) summary(m1) Now alter the factor ...
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NASM x86汇编入门指南 - C/C++ - 清泛网 - 专注C/C++及内核技术

...NASM? 下载地址:http://www.nasm.us/ 可以下载源码包或者rpm包,rpm –iUh *.rpm 四、Linux汇编介绍 4.1 DOS和Linux汇编主要不同的地方 DOS汇编中,大部分工作依靠21号中断(int 21h)来完成,并且BIOS服务中断用int 10h和int 1...
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How to get a list of installed android applications and pick one to run

...ng with a server. Is there any guidelines? – dowjones123 Jun 30 '15 at 20:07 1 @dowjones123 Did u...
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Grep characters before and after match?

... 3 characters before and 4 characters after $> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}' 23_string_and share | improve this answer | ...
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ValueError: invalid literal for int() with base 10: ''

...answered Apr 23 '19 at 3:21 Brad123Brad123 49233 silver badges66 bronze badges ...
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Sorting a list using Lambda/Linq to objects

... answered Jan 2 '13 at 16:32 gls123gls123 4,89922 gold badges2424 silver badges2626 bronze badges ...
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Easiest way to compare arrays in C#

...or tuples via using StructuralComparisons type: object[] a1 = { "string", 123, true }; object[] a2 = { "string", 123, true }; Console.WriteLine (a1 == a2); // False (because arrays is reference types) Console.WriteLine (a1.Equals (a2)); // False (because arrays is reference types) IStruct...
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Using an integer as a key in an associative array in JavaScript

...ered Mar 24 '14 at 12:51 Jesuslg123Jesuslg123 55644 silver badges1515 bronze badges ...
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Mozilla PDF.js:PDF在线预览 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...档的话,把这两个按钮隐藏掉或者删掉即可,在viewer.html源码第180行186行 2.4 再补充 viewer在解析和渲染pdf的时候有点耗费系统资源,尤其是cpu资源,不知道是不是因为我的本子配置较低的缘故,在页面加载等待的过程中,IE...
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How to get the first element of the List or Set? [duplicate]

...wered Jan 27 '15 at 11:18 Sonson123Sonson123 8,81199 gold badges4646 silver badges6868 bronze badges ...