how can I change variable value in a for loop?
10 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi!
i'm writing a code in which there is this part (indicated with "from here" to here" in the code below):
There i'm calculating S(h,:) as the 10% (0.1) of SP + delta. I would like also to calculate the 0.4 and 0.5 respectively, and place them in S(h+1) and S(h+2) (see figure).
I attached the data as xlsx file.
clear; close; clc;
LAT = 42;
SM = 150;
[filename, filepath] = uigetfile( '*.xls*' ) ;
data = xlsread( fullfile( filepath, filename ), 'data' ) ;
assert (size(data, 2) == 4, ...
'Input data must have exactly five columns.');
load('k')
Tm = data(:,3);
ind = k(1,:) == LAT;
k = [k(2:end,1) k(2:end,ind)];
im = (Tm / 5).^ 1.514;
k1 = unique(data(:,1));
for j = 1:numel(k1)
index = (data(:,1) == k1(j));
I = im(index);
I = sum(I);
Iyear{j} = [I];
end
Iyear = cat(1, Iyear{:});
Iyear1 = [k1 Iyear];
for i=1:length(data)
data(i,5)=k(k(:,1)==data(i,2),2);
data(i,6)=Iyear1(Iyear1(:,1)==data(i,1),2);
data(i,6)= round(data(i,6),1);
end
a = (675 * 1E-9 * (data(:,6).^3)) - (771 * 1E-7 * (data(:,6).^2)) + (1792 * 1E-5 * data(:,6)) + 0.49239;
a = round(a,2);
PET = 16 * data(:,5) .*(((10 * data(:,3)) ./ data(:,6)).^ a);
PET = round(PET(:,1),1);
PET(PET<0)=0;
P = data(:,4);
delta = P - PET;
delta = real(delta);
m =[0.1; 0.4; 0.5];
for h = 1:numel(Tm)
if Tm (h) >= -1
S(1,:) = P(1,:) -PET(1,:);
if delta(h) < 0
S(h,:)=0;
if h == 1
ST(h,:)= SM - (SM .* (1- exp(-(PET(h)- P(h))./SM)));
AET(h,:)= PET(h);
else
ST(h,:)= ST(h-1) - (ST(h-1) .* (1- exp(-(PET(h)- P(h))./SM)));
AET(h,:)= P(h) + (ST(h-1) .* (1- exp(-(PET(h)- P(h))./SM)));
end
else
if h == 1
ST(h,:)= SM;
AET (h,:) = PET(h);
else
if delta(h) < (SM - ST(h-1))
ST(h,:)= ST(h-1) + delta(h);
S(h,:)=0;
AET (h,:) = PET(h);
else
ST(h,:)= SM;
AET (h,:) = PET (h);
if ST(h-1) <= SM;
S(h,:) = delta (h)-(SM-ST(h-1));
else
%see from here
search_from = max(1, h-1000);
group_start_idx = find(Tm(search_from:h-1) > -1, 1, 'last') + search_from; %here
group_end_idx = find(Tm(search_from:h-1) < -1, 1, 'first')+ search_from; %here I try to determine the position where Tm is <-1 going backwards
if Tm(group_end_idx,:) >0
SP(h,:) = P(group_start_idx,:);
for ii = 1:length(m)
S(h,:) = SP(h,:)*m(ii) + delta(h,:)
S(h,:) = real(S(h,:));
end
ST(h,:) = SM + delta(h,:);
ST(h,:) = real(ST(h,:));
else
SP(h,:) = P(group_start_idx,:) + P(group_end_idx,:);
for ii = 1:length(m)
S(h,:) = SP(h,:)*m(ii) + delta(h,:)
S(h,:) = real(S(h,:));
end
ST(h,:) = SM + delta(h-1,:);
ST(h,:) = real(ST(h,:));
end
% ..to here
end
end
end
end
else
if h == 1
ST(h,:) = SM;
AET(h,:) = 0;
S(h,:) = 0;
else
ST(h,:) = ST(h-1) + delta(h);
AET(h,:) = 0;
S(h,:) = 0;
end
end
end
a = real(a);
data = real(data);
PET = real(PET);
delta = real(delta);
AET = real(AET);
ST = real(ST);
S = real(S);
6 commentaires
Réponse acceptée
darova
le 21 Mar 2020
Try this
m =[0.1; 0.4; 0.5];
for ii = 1:length(m)
S(h,:) = SP(h,:)*m(ii) + delta(h,:)
end
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Animation dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!