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  • R语言中批量提取当前目录中指定类型的文件

    1、直接测试

    dir()     ## 列出当前目录中所有文件
    myfile <- list.files()   ## 将当前目录中的所有文件都保存为字符
    myfile
    gzfile <- myfile[grep(myfile, pattern =".gz$")]   ## 提取当前目录中以.gz结尾的文件
    gzfile
    txtfile <- myfile[grep(myfile, pattern = ".txt$")]   ## 提取当前目录中以.txt结尾的文件
    txtfile
    > dir()   ## 列出所有文件
    [1] "GSE148812_family.soft"                   
    [2] "GSE148812_family.soft.gz"                
    [3] "GSE148812_genotyping_results.txt"        
    [4] "GSE148812_genotyping_results.txt.gz"     
    [5] "GSE148812_RAW.tar"                       
    [6] "GSM4481589_8378315049_R05C01_Grn.idat"   
    [7] "GSM4481589_8378315049_R05C01_Grn.idat.gz"
    [8] "GSM4481589_8378315049_R05C01_Red.idat"   
    [9] "GSM4481589_8378315049_R05C01_Red.idat.gz"
    > myfile <- list.files()   ## 所有文件赋值给一个变量
    > myfile
    [1] "GSE148812_family.soft"                   
    [2] "GSE148812_family.soft.gz"                
    [3] "GSE148812_genotyping_results.txt"        
    [4] "GSE148812_genotyping_results.txt.gz"     
    [5] "GSE148812_RAW.tar"                       
    [6] "GSM4481589_8378315049_R05C01_Grn.idat"   
    [7] "GSM4481589_8378315049_R05C01_Grn.idat.gz"
    [8] "GSM4481589_8378315049_R05C01_Red.idat"   
    [9] "GSM4481589_8378315049_R05C01_Red.idat.gz"
    > gzfile <- myfile[grep(myfile, pattern =".gz$")]   ## 提取以.gz结尾的文件
    > gzfile
    [1] "GSE148812_family.soft.gz"                
    [2] "GSE148812_genotyping_results.txt.gz"     
    [3] "GSM4481589_8378315049_R05C01_Grn.idat.gz"
    [4] "GSM4481589_8378315049_R05C01_Red.idat.gz"
    > txtfile <- myfile[grep(myfile, pattern = ".txt$")]   ##提取以.txt结尾的文件
    > txtfile
    [1] "GSE148812_genotyping_results.txt"
    > gsefile <- myfile[grep(myfile, pattern = "^GSE")]   ## 提取以GSE开头的文件
    > gsefile
    [1] "GSE148812_family.soft"              
    [2] "GSE148812_family.soft.gz"           
    [3] "GSE148812_genotyping_results.txt"   
    [4] "GSE148812_genotyping_results.txt.gz"
    [5] "GSE148812_RAW.tar"    

    参考:https://zhuanlan.zhihu.com/p/378404523

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  • 原文地址:https://www.cnblogs.com/liujiaxin2018/p/15706291.html
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