docs update

Signed-off-by: Andrey Parfenov <a1994ndrey@gmail.com>

Author: Andrey1994

csharp-package/brainflow/brainflow/data_filter.cs

@@ -495,7 +495,7 @@ public static int get_nearest_power_of_two (int value)
         }
 
         /// <summary>
-        /// calculate avg and stddev bandpowers across channels
+        /// calculate avg and stddev bandpowers across channels, bands are 1-4,4-8,8-13,13-30,30-50
         /// </summary>
         /// <param name="data">2d array with values</param>
         /// <param name="channels">rows of data array which should be used for calculation</param>

java-package/brainflow/src/main/java/brainflow/DataFilter.java

@@ -476,7 +476,8 @@ public static double[] perform_ifft (Complex[] data) throws BrainFlowError
     }
 
     /**
-     * calc average and stddev of band powers across all channels
+     * calc average and stddev of band powers across all channels, bands are
+     * 1-4,4-8,8-13,13-30,30-50
      * 
      * @param data          data to process
      * @param channels      rows of data arrays which should be used in calculation

matlab-package/brainflow/DataFilter.m

@@ -254,7 +254,7 @@ function disable_data_logger()
         end
 
         function [avg_bands, stddev_bands] = get_avg_band_powers(data, channels, sampling_rate, apply_filters)
-            % calculate average band powers
+            % calculate average band powers, bands are 1-4,4-8,8-13,13-30,30-50
             task_name = 'get_avg_band_powers';
             data_1d = data(channels, :);
             data_1d = transpose(data_1d);

python-package/brainflow/data_filter.py

@@ -830,7 +830,7 @@ def get_band_power(cls, psd: Tuple, freq_start: float, freq_end: float) -> float
 
     @classmethod
     def get_avg_band_powers(cls, data: NDArray, channels: List, sampling_rate: int, apply_filter: bool) -> Tuple:
-        """calculate avg and stddev of BandPowers across all channels
+        """calculate avg and stddev of BandPowers across all channels, bands are 1-4,4-8,8-13,13-30,30-50
 
         :param data: 2d array for calculation
         :type data: NDArray