Why doesn't this simple 5 line code work!!! I Am searching for the values of positive peaks in this single wave data

J=[fun(1)];
K=[1];
count=1;
for i=2:1.0:(length(fun)-2)
      if fun(i-1)<fun(i) && fun(i)>fun(i+1)
      J=[J,fun(i+1)]; 
      K=[K,count+1];
     end 
     count=count+1;
     end 

this is a code I wrote to search for the peaks of a very clean (no noise) signal where fun is a row array containing evenly sampled data of a sine wave. Included below is the data that i am trying to process simply copy and paste to store the array. The code found the peaks at the 664th and 991st entry but none of the ones in between!! I wrote the same algorithm in c++ and got the same result so it is not a problem specific to matlab.

Please help me find the error!!!!

fun=-1*pi/180*[-90.15 -90.00 -89.70 -89.10 -88.50 -87.75 -86.70 -85.65 -84.30 -82.95 -81.45 -79.80 -78.15 -76.35 -74.55 -72.30 -70.20 -67.80 -65.40 -62.70 -60.00 -57.15 -54.30 -51.15 -48.00 -44.85 -41.40 -37.95 -34.50 -30.90 -27.30 -23.55 -19.80 -16.05 -12.15 -8.25 -4.95 -1.50 1.95 4.80 7.80 10.65 13.95 17.40 20.70 23.85 27.15 30.30 33.45 36.45 39.45 42.45 45.30 48.00 50.70 53.40 55.95 58.35 60.75 63.15 65.25 67.35 69.45 71.40 73.20 74.85 76.50 78.15 79.50 80.85 82.05 83.25 84.15 85.05 85.95 86.70 87.45 88.05 88.50 88.95 89.10 89.25 89.40 89.25 89.10 88.95 88.50 88.05 87.45 86.70 86.10 85.20 84.30 83.25 82.20 81.00 79.65 78.15 76.65 75.00 73.35 71.55 69.60 67.50 65.40 63.30 60.90 58.65 56.10 53.55 51.00 48.30 45.45 42.60 39.75 36.75 33.75 30.60 27.45 24.30 21.00 17.70 14.40 11.10 7.65 4.80 1.95 -0.90 -4.35 -7.65 -11.10 -14.85 -18.75 -22.35 -26.10 -29.70 -33.30 -36.75 -40.20 -43.50 -46.80 -49.95 -52.95 -55.95 -58.65 -61.35 -63.90 -66.45 -68.85 -70.95 -73.05 -75.00 -76.80 -78.45 -80.10 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