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--- visual3d:documentation:pipeline:file_commands:downsample_data [2024/06/19 12:50] – sgranger
+++ visual3d:documentation:pipeline:file_commands:downsample_data [2024/11/20 20:28] (current) – Cleaned up and working towards Pipeline Command template. Added internal links. wikisysop
@@ Line 1: / Line 1: @@
-downsample all target signals or all analog signals by an integer multiple.
+===== Downsample Data =====
-**note: as of february 2017, this is still a hidden and unsupported command**
+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 modifying the analog rate, not that the resulting analog rate must be an integer multiple of the target rate.
+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 ======
+==== Pipeline Command ====
-**downsample_data**
+<code>
-/old_file_name=
+Downsample_Data
-/signal_types=
+/OLD_FILE_NAME=
-/new_point_rate=
+/SIGNAL_TYPES=
-/new_analog_rate=
+/NEW_POINT_RATE=
-**;**
+/NEW_ANALOG_RATE=
-====== example: downsample target ======
+;
+</code>
-given a c3d file with a point rate of 50 and an analog rate of 200
+==== Example: Downsample TARGET ====
-downsample the point signals to 25
+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.
-**downsample_data**
+<code>
-/old_file_name=*test.c3d
+Downsample_Data
-/signal_types=target
+/OLD_FILE_NAME=*test.c3d
-/new_point_rate=25
+/SIGNAL_TYPES=TARGET
-/new_analog_rate=
+/NEW_POINT_RATE=25
-**;**
+/NEW_ANALOG_RATE=
-====== example: downsample analog ======
+;
+</code>
-given a c3d file with a point rate of 50 and an analog rate of 200
+==== Example: Downsample ANALOG ====
-downsample the analog signals to 100
+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.
-**downsample_data**
+<code>
-/old_file_name=*test.c3d
+Downsample_Data
-/signal_types=analog
+/OLD_FILE_NAME=*test.c3d
-/new_point_rate=
+/SIGNAL_TYPES=ANALOG
-/new_analog_rate=100
+/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.