001、
[root@localhost test]# ls a.txt [root@localhost test]# cat a.txt ## 测试文本 gene mRNA exon exon exon exon exon exon exon CDS CDS CDS CDS exon CDS gene gene mRNA exon exon aaaa aaaa exon exon exon CDS CDS CDS CDS CDS CDS [root@localhost test]# awk '{printf("%s\t",$1); a=$1; for(i = 1; i <= NF; i++) {if($i==a){} else {printf("%s\t", $i)}; a=$i} printf("\n")}' a.txt ## 将多个连续的重复字段以一个字段显示 gene mRNA exon CDS exon CDS gene mRNA exon aaaa exon CDS
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