How can I start the cumulative from a specific year?

Hello everyone,

I would need that my cumulative sum to start from 2015 instead of 1998; how can I do it?

load('DATI_ECM_GIORNALIERI')
C1 = cumsum(DATIECMWFgiornalieri{:, 4}) 

Thank you!

Answer 1

[Voss]

load('DATI_ECM_GIORNALIERI')
idx = find(DATIECMWFgiornalieri{:,1} == 2015,1);
C1 = cumsum(DATIECMWFgiornalieri{idx:end, 4});

[Pul]

Thank you.

But how can I plot it with "LARSEN", if the number of data is different?

load ('larsen_daily')
loaf('LARSEN')
DTv = datetime(DATIECMWFgiornalieri{:,1:3});

smb=table2array(DATIECMWFgiornalieri(:,4))
for i =1:8402
    if   isnan(smb(i))
        smb(i)=0;
    end
end
Cum=cumsum(smb)
Cum_smbp=DATIECMWFgiornalieri;
Cum_smbp(:,4)=array2table(Cum);
plot(larsen_daily.TOA5,LARSEN, 'DisplayName','AWS'); 
hold on
plot(DTv,table2array(Cum_smbp(:,4)),'m', 'DisplayName','ECMWF');
plot(DTv,table2array(Cum_smbp(:,4),Cum_smbp.SMB_larsenmm(1:8042),'m', 'DisplayName','ECMWF'));
legend('Location','best')

plot(DTv, C1);
hold on
plot(larsen_daily.TOA5, A);

Thank you.