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Opposite of %in%: exclude rows with values specified in a vector
A categorical variable V1 in a data frame D1 can have values represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
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Find duplicate lines in a file and count how many time each line was duplicated?
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String concatenation: concat() vs “+” operator
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How can I replace every occurrence of a String in a file with PowerShell?
Using PowerShell, I want to replace all exact occurrences of [MYID] in a given file with MyValue . What is the easiest way to do so?
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Hidden features of C
I know there is a standard behind all C compiler implementations, so there should be no hidden features. Despite that, I am sure all C developers have hidden/secret tricks they use all the time.
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家政O2O百家争鸣后的卡位战：烧钱补贴并非良药 - 资讯 - 清泛网 - 专注C/C+...
...想存活，就需要不断抢占市场，战争在所难免。小马管家CEO马晨飞曾坦言“大家在抢占市场份额的时候，都难免去烧钱补贴做推广。但这绝对不是一个良性的生意。”如何在同质化和与巨头的竞争中突围，真正实现赢利，是所有...
家政O2O百家争鸣后的卡位战：烧钱补贴并非良药 - 资讯 - 清泛网 - 专注C/C+...
...想存活，就需要不断抢占市场，战争在所难免。小马管家CEO马晨飞曾坦言“大家在抢占市场份额的时候，都难免去烧钱补贴做推广。但这绝对不是一个良性的生意。”如何在同质化和与巨头的竞争中突围，真正实现赢利，是所有...
Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
I would like install R on my laptop Mac OS X version 10.7.3
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How to convert char to int?
What is the proper way to convert a char to int ?
This gives 49 :
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微博为什么限制140字(附短信70字限制考) - 创意 - 清泛网 - 专注C/C++及内核技术
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We like to keep it short and sweet! It also just so happens that 140 characters is the perfect length for sending status updates via text message. The standard text message length in most places is 160 characters per message. We reserve 20 characters for people’s names, and the other 140 ...