GRF_F_AP_RAW_left

The file is structured as a matrix with T rows × K columns (T=8,819; K=216). Each row holds the data of one gait trial. The first column identifies each dataset (“DATASET_ID”), the second column each participant (“SUBJECT_ID”), the third column each gait analysis session (“SESSION_ID”), and the fourth column each single gait trial within a session (“TRIAL_ID”). The remaining columns contain the values of the anterior-posterior GRF signals for each gait trial. Note that due to the non-normalized nature of the data and the resulting different time-series lengths in the “RAW” files, non-available numbers have been replaced by “NaN” to maintain a constant matrix-dimension.本数据集文件采用矩阵结构，维度为T行×K列（其中T=8819，K=216）。每一行对应一次步态测试的完整数据。第一列为数据集标识（DATASET_ID），第二列为受试者标识（SUBJECT_ID），第三列为步态分析会话标识（SESSION_ID），第四列为单次会话内的单次步态测试标识（TRIAL_ID）。其余列均存储对应单次步态测试的前后向地面反作用力（GRF, Ground Reaction Force）信号数值。需注意，由于原始（RAW）文件中的数据未做归一化处理，导致各时序序列长度存在差异，因此将缺失值替换为"NaN"以维持矩阵维度的一致性。