Saving only the last loop

Hi, I'm very new to MATLAB (introduced to me this first term at uni), and I have been struggling with trying to save each loop in a column that is preallocated as 135x1 using zeros()

This is my code for the section I am stuck on:

%% Preallocating memory

dischargemax=zeros((winterdischarge(end,1)-winterdischarge(1,1)),1);

yearcolumn=winterdischarge(:,1);

%% Looping to find max of each year (Full year of 1883 not given, only months Nov and Dec.)

%% 1883

dischargemax(1,1)=max(winterdischarge(yearcolumn==1883,4));

%% other years

for i=2:length(leapyear)

for ii = 1884:2018

extract=winterdischarge(yearcolumn == ii,4);

end

dischargemax(i,1)=max(extract);

end

In ans I have the first max of the first year in (1,1) and then every other row is the max extract of the last year. How would I fix this? Also how would I set the output to dischargemax instead of ans?

Thank you.

Answer 1

[KALYAN ACHARJYA]

Do the proper indexing

May be

for i=2:length(leapyear)
    for ii = 1884:2018
        extract(ii)=winterdischarge(yearcolumn==ii,4);
    end
    dischargemax(i)=max(extract); 
end

See the following example-

for k=1:n
result=...??
end

This code reflects the the last iteration results only (Result having last data), otherwise

for k=1:n
result(k)=...??
    end

It holds the all output in result 1 D array, do as per your requiremnets.

Any issue let me know.

[Neill Harris]

Hi,

Thank you for the speedy reply.

After implementing your code I get the following error.

Subscripted assignment dimension mismatch.

Error in MaxDischargeWinter (line 22)

extract(ii)=winterdischarge(yearcolumn==ii,4);