---
name: "idngram_merge"
section: "1"
platform: "linux"
package: "sunpinyin"
version: "3.0.0rc2-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/idngram_merge"
---

# idngram\_merge(1)

merge idngram file into one

## NAME

idngram\_merge - merge idngram file into one

## SYNOPSIS

**idngram\_merge** \[*option*\]... *idngram\_file*...

## DESCRIPTION

**idngram\_merge** merge multiple idngram file, each of them are sorted \[id1,...,idN,freq\] array, into one idngram file. For those id1..idN which  appear in more than one files, only one item will appear in the final file,  and its freq are summed. The idngram files are original generated by  **ids2ngram**.

## OPTIONS All the following options are mandatory.

- **-n**, **--NMax** *N*

  Specify the N-gram of source data file.

- **-o**, **--out** *output-file*

  Specify the final merged idngram file.

## EXAMPLE

Following example merge 2 id3gram files into a large one:

```
    B<idngram_merge -n3 -o all.id3gram first.id3gram second.id3gram>
```

## AUTHOR

Originally written by Phill.Zhang \<phill.zhang@sun.com\>. Currently maintained by Kov.Chai \<tchaikov@gmail.com\>.

## SEE ALSO

[**ids2ngram**(1)](/ids2ngram/1.md).