---
name: "g_dih"
section: "1"
platform: "linux"
package: "gromacs-data"
version: "4.5.5-2"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/g_dih"
---

# g\_dih(1)

analyzes dihedral transitions VERSION 4.5.4-dev-20110404-bc5695c

## NAME

g\_dih - analyzes dihedral transitions

**VERSION 4.5.4-dev-20110404-bc5695c**

## SYNOPSIS

**g\_dih** **-f** *traj.xtc*  **-s** *topol.tpr*  **-o** *hello.out*  **-\[no\]h** **-\[no\]version** **-nice** *int*  **-b** *time*  **-e** *time*  **-dt** *time*  **-\[no\]w** **-\[no\]sa** **-mult** *int*

## DESCRIPTION

 **g\_dih** can do two things. The default is to analyze dihedral transitions by merely computing all the dihedral angles defined in your topology for the whole trajectory. When a dihedral flips over to another minimum an angle/time plot is made.

The opther option is to discretize the dihedral space into a number of bins, and group each conformation in dihedral space in the appropriate bin. The output is then given as a number of dihedral conformations sorted according to occupancy.

## FILES

**-f** *traj.xtc* **Input**\
  Trajectory: xtc trr trj gro g96 pdb cpt

**-s** *topol.tpr* **Input**\
  Run input file: tpr tpb tpa

**-o** *hello.out* **Output**\
  Generic output file

## OTHER OPTIONS

**-\[no\]h***no*    \
  Print help info and quit

**-\[no\]version***no*    \
  Print version info and quit

**-nice** *int* **19**\
  Set the nicelevel

**-b** *time* **0**     \
  First frame (ps) to read from trajectory

**-e** *time* **0**     \
  Last frame (ps) to read from trajectory

**-dt** *time* **0**     \
  Only use frame when t MOD dt = first time (ps)

**-\[no\]w***no*    \
  View output  **.xvg**,  **.xpm**,  **.eps** and  **.pdb** files

**-\[no\]sa***no*    \
  Perform cluster analysis in dihedral space instead of analysing dihedral transitions.

**-mult** *int* **-1**\
  mulitiplicity for dihedral angles (by default read from topology)

## SEE ALSO

**[gromacs(7)](/gromacs/7.md)**

More information about **GROMACS** is available at \<*http://www.gromacs.org/*\>.