function [sector, selectedIndices] = extractHelixAngleSector(helixAngles,startAngle,angularWidth)
    % helixAngle: PxL Matrix of P plots values of L length
    % startAngle in degrees
    % angularWidth in degrees
    [Rows,~] = size(helixAngles);

    startIndex = round((startAngle/360) * Rows)+1;
    endIndex = round((angularWidth/360) * Rows);
    endIndex = endIndex + startIndex; % can be more that size of Rows
    if endIndex <= Rows
        sector = helixAngles(startIndex:endIndex,:);
        selectedIndices = startIndex:endIndex;
    else
        sector = [helixAngles(startIndex:end,:);helixAngles(1:endIndex-Rows,:)];
        selectedIndices = [startIndex:Rows,1:endIndex-Rows];
    end
end