Function parse_dda_output 

pub fn parse_dda_output(
    content: &str,
    column_stride: Option<usize>,
) -> Result<Vec<Vec<f64>>>

Parse DDA binary output and return as 2D matrix [channels × timepoints]

Based on dda-py _process_output: skip first 2 columns, take every Nth column, then transpose

Arguments

• content - Raw text output from run_DDA_AsciiEdf binary
• column_stride - Optional stride for column extraction (default 4 for ST/CT/DE, use 2 for CD, use 1 for SY)

Returns

Processed matrix in [channels/scales × timepoints] format