===== Downsample Data =====

This command downsamples all [[visual3d:documentation:c3d_signal_types:target_data_type|TARGET]] signals or all [[visual3d:documentation:c3d_signal_types:analog_data_type|ANALOG]] signals in a [[visual3d:documentation:c3d_signal_types:c3d_format|C3D file]] by an integer multiple. **Note: This is a hidden and unsupported command**

If you are modifying the ANALOG rate then it will be necessary to ensure that the resulting ANALOG rate is an integer multiple of the TARGET rate.

==== Pipeline Command ====

<code>
Downsample_Data
/OLD_FILE_NAME=
/SIGNAL_TYPES=
/NEW_POINT_RATE=
/NEW_ANALOG_RATE=
;
</code>

==== Example: Downsample TARGET ====

Given a C3D file with a POINT rate of 50 Hz and an ANALOG rate of 200 Hz , downsample the POINT signals to 25 Hz.

<code>
Downsample_Data
/OLD_FILE_NAME=*test.c3d
/SIGNAL_TYPES=TARGET
/NEW_POINT_RATE=25
/NEW_ANALOG_RATE=
;
</code>

==== Example: Downsample ANALOG ====

Given a C3D file with a POINT rate of 50 Hz and an ANALOG rate of 200 Hz, downsample the ANALOG signals to 100 Hz.

<code>
Downsample_Data
/OLD_FILE_NAME=*test.c3d
/SIGNAL_TYPES=ANALOG
/NEW_POINT_RATE=
/NEW_ANALOG_RATE=100
;
</code>

==== See Also ====

The pipeline command [[visual3d:documentation:pipeline:file_commands:upsample_point_data_to_analog_rate|Upsample_Point_Data_to_Analog_Rate]] upsamples the point data of a C3D file to match the analog rate using a cubic spline.