erorr with the function

Hi I'm trying understand why the following notification of an error appears on the command window ">> fillMissingData Index exceeds matrix dimensions.

Error in fillMissingData (line 17) tday=varargin(1);" but I can not . Can Somebody show what is wrong with this function

function my_prices=fillMissingData(prices, varargin)
%  my_prices=fillMissingData(prices) fills missing price with previous
%  day's price
%  my_prices=fillMissingData(prices, tday, cday) fills missing prices with previous day's price including non-trading days
%  as specified in cday

if (nargin == 1)
    my_prices=prices;
    for t=2:size(my_prices, 1)
        missData=~isfinite(my_prices(t, :, :));
        my_prices(t, missData)=my_prices(t-1, missData);
    end
else
    % We deal only with 2 dim prices array here.
   tday=varargin(1);
    cday=varargin(2);
    my_prices=NaN*zeros(size(cday, 1), size(prices, 2));

      tdayIdx=find(tday==cday(1));
      if (~isempty(tdayIdx))
          my_prices(1, :)=prices(tdayIdx, :);
      end

      for t=2:size(my_prices, 1)
          tdayIdx=find(tday==cday(t));
          if (~isempty(tdayIdx))
              my_prices(t, :)=prices(tdayIdx, :);

              missData=find(~isfinite(my_prices(t, :)));
              my_prices(t, missData)=my_prices(t-1, missData);
          else
              my_prices(t, :)=my_prices(t-1, :);
          end
      end
  end

Answer 1

[Matt J]

I imagine you meant to do

     tday=varargin{1};
     cday=varargin{2};

[Maciek]

i can not set the breakpoints to understand acting of the function but i can not because of the bug