---
name: "cmtk-concat_affine"
section: "1"
platform: "linux"
package: "cmtk"
version: "3.3.1p2+dfsg-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/cmtk-concat_affine"
---

# cmtk-concat\_affine(1)

Concatenate affine transformations

## NAME

concat\_affine - Concatenate affine transformations

## SYNOPSIS

concat\_affine \[options\] x0 \[x1 ...\] \
  WHERE x0 ... xN is \[{-i,--inverse}\] affine transformation #. (If the first transformation in the sequence is inverted, then '--inverse' must be preceded by '--', i.e., use '-- --inverse xform.path').

## DESCRIPTION

This tool computes the explicit concatenation of multiple affine coordinate transformations, each of which can be optionally inverted.

## OPTIONS

### Global Toolkit Options (these are shared by all CMTK tools)

- **--help**

  Write list of basic command line options to standard output.

- **--help-all**

  Write complete list of basic and advanced command line options to standard output.

- **--wiki**

  Write list of command line options to standard output in MediaWiki markup.

- **--man**

  Write man page source in 'nroff' markup to standard output.

- **--version**

  Write toolkit version to standard output.

- **--echo**

  Write the current command line to standard output.

- **--verbose-level** *\<integer\>*

  Set verbosity level.

- **--verbose**, **-v**

  Increment verbosity level by 1 (deprecated; supported for backward compatibility).

- **--threads** *\<integer\>*

  Set maximum number of parallel threads (for POSIX threads and OpenMP).

### Main Options

- **--outfile** *\<string\>*, **-o** *\<string\>*

  Output transformation. **\[Default: concat.xform \]**

- **--append**, **-a**

  Append to output file \[default: overwrite\].

- **--invert-output**, **-I**

  Invert concatenated transformation before output \[default: no\].

## AUTHORS

Torsten Rohlfing, with contributions from Michael P. Hasak, Greg Jefferis, Calvin R. Maurer, Daniel B. Russakoff, and Yaroslav Halchenko

## LICENSE

http://www.fsf.org/licensing/licenses/gpl.html

## BUGS

Report bugs at http://nitrc.org/projects/cmtk/

## ACKNOWLEDGMENTS

CMTK is developed with support from the NIAAA under Grant AA021697, National Consortium on Alcohol and Neurodevelopment in Adolescence (N-CANDA): Data Integration Component. From April 2009 through September 2011, CMTK development and maintenance was supported by the NIBIB under Grant EB008381.