loop not storing, or running through all values

I dont really know what im doing with MATLAB so cant work out whats wrong.

Im trying to make a loop that will use a function I have made to calculate the seasonal cycle and its range at each location within an area (latitude and longitude) :

function seasonal_cycle = calc_seasonal_cycle(sst,time)

nharm = 1;

year_length = 365.25;

cutoff = 0;

[r_sst,c_sst] = size(sst);

[r_time,c_time] = size(time);

if (r_sst > r_time)

sst = sst.' ;

end

ix_n = find(~isnan(sst));

if isempty(ix_n)

timeseries = NaN;

disp('Input data is all NaN')

end

if length(ix_n) < 2

seasonal_cycle = NaN;

disp('Input data mostly NaN')

end

sst_good = sst(ix_n);

time_good = time(ix_n);

[amplitude,phase,frac,offset,yy] = fit_harmonics(sst_good,time_good, nharm, year_length, cutoff); % using fit_harmonics function to fit cosine

seasonal_cycle = offset + amplitude .* cos(2 .* pi .* (time_g/year_length) + phase); % equation for cycle

end

loop:

[nr,nc,nt] = size(sst);

cycle_range = NaN(nr,nc);

for row = 1:1:nr

for col = 1:1:nc

[~,loop_lat_ix] = min(abs(lat - row));

[~,loop_lon_ix] = min(abs(lon - -col));

loop_timeseries = squeeze(sst(loop_lat_ix,loop_lon_ix,:));

loop_seasonal_cycle = calc_seasonal_cycle(loop_timeseries,time);

cycle_range (row,col) = max(loop_seasonal_cycle(:))-min(loop_seasonal_cycle(:));

end

end

this gives me a matrix where the first 60 colomns in the first row give a value, and every other row and column is NaN.

[chrisw23]

How about to use a conditional breakpoint in your loop to debug the problem yourself?

HowTo Matlab Breakpoints

[Manoj Mirge]

Can you provide all the files used by your programm ?