save data all of in loop

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il147
il147 2021-10-9
评论： il147 2021-10-9
I have problem with saving data in loop
I'd like to seperate lon and lat which are saved in num
lon is saved num(1), num(3),num(5)......, and lat is num(2),num(4),num(6)......
That is my code and num
num=xlsread('ENVISAT.ex.xlsx');
num=num(~isnan(num));
num=nonzeros(num)
i=0
lon=[];
lat=[];
for i=1:30
i=i+um
lon=num(i+1)
lat=num(2*i+1)
end

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采纳的回答

Rik
Rik 2021-10-9
No loop required:
num=xlsread('ENVISAT.ex.xlsx');
num=num(~isnan(num));
num=nonzeros(num);
lon=num(1:2:end);
lat=num(2:2:end);
In your code it was overwriting the variable every iteration, instead of indexing.

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