branch(1) handle a family of fields


branch [options] filename


Generates vtk file colection for visualization with paraview:

        branch output.branch -paraview


Read and output a branch of finite element fields from file, in field text file format.


add dir to the RHEOPATH search path. See also geo(2) for RHEOPATH mechanism.

specifies the name of the file containing the input field.

read field on standard input instead on a file.

-ndigit int
Number of digits used to print floating point values when using the `-geo' option. Default depends upon the machine precision associated to the Float type.


print the table of contents (toc) to standard output and exit.


-extract int
Extract the i-th record in the file. The output is a field or multi-field file format.

Output on stdout in `.branch' format. This is the default.

Generate a collection of vtk files for using paraview.

Generate a single vtk file with numbered fields.

Run 1d animation using gnuplot.

This driver is unsupported for animations.


-umin float
-umax float
set the solution range for the gnuplot driver. By default this range is computed from the first field of the branch, and this could be problematic when this field is initialy zero.

-subdivide int
When using a high order geometry, the number of points per edge used to draw a curved element. Default value is the mesh order.

-topography filename[.field[.gz]]
performs a tridimensionnal elevation view based on the topographic data.

performs a P1 projection on the fly. This option is useful when rendering P0 data while vtk render requieres P1 description.

For two dimensional field, represent values as elevation in the third dimension. This is the default.

Prevent from the elevation representation.

-scale float
applies a multiplicative factor to the field. This is useful e.g. in conjonction with the elevation option. The default value is 1.

print messages related to graphic files created and command system calls (this is the default).

does not print previous messages.

clear temporary graphic files (this is the default).

does not clear temporary graphic files.

execute graphic command (this is the default).

does not execute graphic command. Generates only graphic files. This is usefull in conjuction with the -noclean command.


The `.branch' file format bases on the `.field' one:

       EXAMPLE          GENERAL FORM
        #!branch        #!branch
        branch          branch
          1 1 11        <version> <nfield=1> <nvalue=N>
          time u        <key> <field name>
          #time 3.14    #<key> <key value 1>
          #u            #<field name>
          field         <field 1>
          .....         ....
          .....         ....
          #time 6.28    #<key> <key value N>
          #u            #<field name>
          field         <field N>
          .....         ....

The key name is here time, but could be any string (without spaces). The previous example contains one field at each time step. Labels appears all along the file to facilitate direct jumps and field and step skips.

The format supports several fields, such as (t,u(t),p(t)), where u could be a multi-component (e.g. a vector) field:

          1 2 11
          time u p
          #time 3.14
          1 2
          #time 6.28