entityMap|blocks|key|8f7mo|text|$+awk+'{printf+"%25s%25s",+(/%5E>/+?+ors+:+""),+$0;+ors=ORS}+END{print+""}'+file
>OTU1;size=4;ATTCCGGGTTTACTATTCCTTTTATCGAATC
>OTU2;size=10;CGGATCTAGGCGATACT
>OTU3;size=5;ATTCCCGGGATCTAACTTTTC|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|alkqk|unstyled^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|G|9|@]|A|@]|B|$C|D]]|$2|E|4|-4|6|F|8|H|9|@]|A|@]|B|$]]]]

<pre><code>$ awk '{printf "%s%s", (/^&gt;/ ? ors : ""), $0; ors=ORS} END{print ""}' file
&gt;OTU1;size=4;ATTCCGGGTTTACTATTCCTTTTATCGAATC
&gt;OTU2;size=10;CGGATCTAGGCGATACT
&gt;OTU3;size=5;ATTCCCGGGATCTAACTTTTC
</code></pre>

entityMap|blocks|key|bf7fi|text|这是另一个awk脚本。使用awk内部解析机制。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|7022j|awk+'BEGIN{RS=">";OFS="";}NR>1{$1=$1;print+">"$0}'+input.txt|code-block|syntax|javascript|co32c|输出为：|47pt4|>OTU1;size=4;ATTCCGGGTTTACTATTCCTTTTATCGAATC
>OTU2;size=10;CGGATCTAGGCGATACT
>OTU3;size=5;ATTCCCGGGATCTAACTTTTC|61d85|解释：|7fmgq|awk+'
BEGIN+{++++++++#+initialize+awk+internal+variables
++RS=">";++++++#+set+`RS`=record+separator+to+`>`
++OFS="";++++++#+set+`OFS`=output+field+separator+to+empty+string.
}
NR>1+{+++++++++#+handle+from+2nd+record+(1st+record+is+empty).
++$1=$1;+++++++#+regenerate+the+output+line
++print+">"$0++#+print+out+">"+with+computed+output+line
}'+input.txt|11gto^0|5|3|D|3|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|U|9|@$A|V|B|W|C|D]|$A|X|B|Y|C|D]]|E|@]|F|$]]|$2|G|4|H|6|I|8|Z|9|@]|E|@]|F|$J|K]]|$2|L|4|M|6|7|8|10|9|@]|E|@]|F|$]]|$2|N|4|O|6|I|8|11|9|@]|E|@]|F|$J|K]]|$2|P|4|Q|6|7|8|12|9|@]|E|@]|F|$]]|$2|R|4|S|6|I|8|13|9|@]|E|@]|F|$J|K]]|$2|T|4|-4|6|7|8|14|9|@]|E|@]|F|$]]]]

Here is another <code>awk</code> script. Using the <code>awk</code> internal parsing mechanism.

<pre><code>awk 'BEGIN{RS="&gt;";OFS="";}NR&gt;1{$1=$1;print "&gt;"$0}' input.txt
</code></pre>

Output is:

<pre><code>&gt;OTU1;size=4;ATTCCGGGTTTACTATTCCTTTTATCGAATC
&gt;OTU2;size=10;CGGATCTAGGCGATACT
&gt;OTU3;size=5;ATTCCCGGGATCTAACTTTTC
</code></pre>

Explanation:

<pre><code>awk '
BEGIN { # initialize awk internal variables
 RS="&gt;"; # set `RS`=record separator to `&gt;`
 OFS=""; # set `OFS`=output field separator to empty string.
}
NR&gt;1 { # handle from 2nd record (1st record is empty).
 $1=$1; # regenerate the output line
 print "&gt;"$0 # print out "&gt;" with computed output line
}' input.txt
</code></pre>

entityMap|blocks|key|52p3f|text|你能试着也跟着看吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|dbb28|awk+-v+RS=">"+'NR>1{gsub(/\n/,"");print+">"$0}'++Input_file|code-block|syntax|javascript|c0bp6|我最初的尝试是awk+-v+RS=">"+-v+FS="\n"+-v+OFS=""+'NF>1{$1=$1;print+">"$0}'++Input_file，但后来我看到它已经回复了buy+dudi男孩，所以写了另一个(最先提到的)。|offset|length|style|CODE|bdji9^0|0|0|7|20|0^^$0|$]|1|@$2|3|4|5|6|7|8|O|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|P|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|Q|9|@$J|R|K|S|L|M]]|A|@]|B|$]]|$2|N|4|-4|6|7|8|T|9|@]|A|@]|B|$]]]]

Could you please try following too.

<pre><code>awk -v RS="&gt;" 'NR&gt;1{gsub(/\n/,"");print "&gt;"$0}' Input_file
</code></pre>

My original attempt was <code>awk -v RS="&gt;" -v FS="\n" -v OFS="" 'NF&gt;1{$1=$1;print "&gt;"$0}' Input_file</code> but later I saw it is already answered buy dudi boy so written another(first mentioned) one.

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://stackoverflow.com/questions/56278627/how-to-merge-two-fasta-files-and-remove-the-duplicate-information/56544082#56544082|blocks|key|p62d|text|类似于我的答案here|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|3acnq|$+awk+'BEGIN{RS=">";+FS="\n";+ORS=""}
+++++++(FNR==1){next}
+++++++{+name=$1;+seq=$0;+gsub(/(%5E[%5E\n]*%7C)\n/,"",seq)+}
+++++++{+print+">"+name+seq+}'+file1.fasta+file2.fasta+file3.fasta+...|code-block|syntax|javascript|ad0kg^0|7|4|0|0|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|Q|G|@]|H|@$I|R|J|S|A|T]]|6|$]]|$A|K|C|L|2|M|F|U|G|@]|H|@]|6|$N|O]]|$A|P|C|-4|2|E|F|V|G|@]|H|@]|6|$]]]]

Similar to my answer <a href="https://stackoverflow.com/questions/56278627/how-to-merge-two-fasta-files-and-remove-the-duplicate-information/56544082#56544082">here</a>:

<pre><code>$ awk 'BEGIN{RS="&gt;"; FS="\n"; ORS=""}
 (FNR==1){next}
 { name=$1; seq=$0; gsub(/(^[^\n]*|)\n/,"",seq) }
 { print "&gt;" name seq }' file1.fasta file2.fasta file3.fasta ...
</code></pre>

Here is my input file

<pre><code>&gt;OTU1;size=4;
ATTCCGGGTTTACT
ATTCCTTTTATCGA
ATC
&gt;OTU2;size=10;
CGGATCTAGGCGAT
ACT
&gt;OTU3;size=5;
ATTCCCGGGATCTA
ACTTTTC
</code></pre>

The expected output file is: 

<pre><code>&gt;OTU1;size=4;ATTCCGGGTTTACTATTCCTTTTATCGAATC
&gt;OTU2;size=10;CGGATCTAGGCGATACT
&gt;OTU3;size=5;ATTCCCGGGATCTAACTTTTC
</code></pre>

I've tried the code from <a href="https://stackoverflow.com/questions/15857088/remove-line-breaks-in-a-fasta-file">Remove line breaks in a FASTA file</a>

but this doesn't work for me, and I am not sure how to modify the code from that post...
Any suggestion? Thanks in advance!

Concatenate the sequence to the ID in fasta file

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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 这是我的输入文件 >OTU1;size=4;ATTCCGGGTTTACTATTCCTTTTATCGAATC>OTU2;size=10;CGGATCTAGGCGATACT>OTU3;size=5;ATTCCCGGGATCTAACTTTTC 预期的输出文件为： >OTU1;size=4;ATTCCGGGTTTACTATT...

问将序列连接到fasta文件中的ID
EN

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问将序列连接到fasta文件中的IDEN