Searching Loop issues , not saving to cell array

Question

Christopher Hall 2015-5-9

0
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https://ww2.mathworks.cn/matlabcentral/answers/215940-searching-loop-issues-not-saving-to-cell-array

编辑： Christopher Hall 2015-5-9

Hi,

I am trying to scan through x,y data to find values which lie within a certain x,y range. I cannot however get the data to save to the cell arrays. When I enter the nnn value individually I get the correct result and it saves to the cell array. However when I run it in loop the data does not save to the array and it just gives me an array of [2000,1] all empty.

Is there something I am missing?

The x values I am scanning are from -1000 to 1000

y values are as a function of y(n,1) = H*exp(-(j/k)*log(2));

    x100 = (-1000:1000)';
    y100 = y + 100;
    for nnn = (1:2001)
      yrange = y100(nnn,1);
      yrangemin= yrange -5;
      yrangemax= yrange +5;
      xrange = x100(nnn,1);
      xrangemin = xrange - 5;
      xrangemax = xrange + 5;
      searchx = find((pointsx)>xrangemin &  (pointsx)<xrangemax);
      searchy = find( pointsy>yrangemin & pointsy<yrangemax);
      ANS = {};
      ANS{nnn,1} = searchx;
      ANS{nnn,2} = searchy;
      if samplesize > 1000;
      end 
    end 
    end