大约有 43,067 项符合查询结果（耗时：0.0363秒） [XML]
Extracting numbers from vectors of strings
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11 Answers
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How to use the 'sweep' function
...nd use in the operation defined by FUN.
For instance, if you want to add 1 to the 1st row, 2 to the 2nd, etc. of the matrix you defined, you will do:
sweep (M, 1, c(1: 4), "+")
I frankly did not understand the definition in the R documentation either, I just learned by looking up examples.
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Cleaning `Inf` values from an R dataframe
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Option 1
Use the fact that a data.frame is a list of columns, then use do.call to recreate a ...
How to perform element-wise multiplication of two lists?
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14 Answers
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Difference between decimal, float and double in .NET?
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18 Answers
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How to create a self-signed certificate with OpenSSL
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15 Answers
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How to do version numbers? [closed]
...the "unstable watchout" on there. So how would you go about versioning? Is 1.0 stable? Should the build date be in the version number? Tell me what you guys think!
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Is it safe to check floating point values for equality to 0?
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It is safe to expect that the comparison will return true if and only if the double variable h...
Where are my postgres *.conf files?
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edited Jan 11 '19 at 16:12
Nam G VU
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C++ 读写xml方法整理（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...八门，太多了，这里对常用的几种做一个总结，附demo。1、Markup 下载：
特点：C++编写的，一个.h，一个.cpp，绿色小巧，直接加入工程源码编译，只支持MFC。
<?xml version="1.0" encoding="utf-8"?>
<root>
<update ver="1.2.0" pkg="setup.exe" force...