problem with input arguments
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i have a problem with the inputs of the following function. Tempo and t_media_filtrata_t are both previously developed and they are declared in the worhspace but when i run the function it compares an error message that say that input (tempo or t_media_filtrata_t) argument is undefined. Someone can help me? thank you
function[x]=residuo(x_ini,tempo,t_media_filtrata_t)
prompt={'potenza immessa(W):','profondità del foro(m)','passo di campionamento(s)','velocità di Darcy(m/s)','resistenza termica(m*K/W)'};
dlg_title='Input';
num_lines=1;
def={'3000','100','60','5*10^-10','0.1'};
answer=inputdlg(prompt,dlg_title,num_lines,def);
Q=str2num(answer{1});
H=str2num(answer{2});
deltaT=str2num(answer{3});
q=str2num(answer{4});
Rb=str2num(answer{5});
r_bw=0.075;
ro=2500;
c=3000;
row=1000;
cw=4186;
for index=1:length(t_media_filtrata_t)
T_calcolata(index)= (Q/H)./(4.*pi.*sqrt(x_ini(1).*x_ini(1))).*exp( (row.*cw.*q.*r_bw)./ (2.*x_ini(1) )).*quad(@(phi) (exp(-phi-(((r_bw.^2)./x_ini(1)) + ((r_bw.^2)./x_ini(1))).*(((row.*cw.*q).^2)./(16.*x_ini(1).*phi))).*(1./phi)),0,(((row.*cw.*q).^2).*tempo(index))./(4.*ro.*c.*x_ini(1)))+x_ini(2)+((Q/H)*Rb);
end
misfit=(T_calcolata-t_media_filtrata_t).^2;
residuo= sqrt((sum(misfit))/length(tempo));
opt = optimset ( 'Display' , 'iter','MaxIter' ,20 );
[x, fval, exitflag, output] = fminsearch ( residuo,x_ini,opt )
figure;
plot(tempo,t_media_filtrata_t,tempo,T_calcolata,'r');
title('segnale misuratao e calcolato per inversione');
end
2 Kommentare
Mischa Kim
am 24 Feb. 2014
Bearbeitet: Mischa Kim
am 24 Feb. 2014
How and where from are you calling the function?
Antworten (3)
Iain
am 24 Feb. 2014
You need to supply those arguments to the function, by calling it like:
tempo_var_with_silly_long_name = 5; %use the real value, not what I've just came up with
t_media_filtrata_t = 42; %use the real value, not what I've just came up with
x_ini = 0;
x=residuo(x_ini, tempo_var_with_silly_long_name ,t_media_filtrata_t);
2 Kommentare
Image Analyst
am 24 Feb. 2014
It's a function that requires inputs so you can't just type F5 or click the green "run" triangle. You need to supply values for those inputs.
0 Kommentare
Mischa Kim
am 24 Feb. 2014
Bearbeitet: Mischa Kim
am 24 Feb. 2014
If you execute the which command in the command window do you get
which tempo
tempo is a variable.
which t_media_filtrata_t
t_media_filtrata_t is a variable.
If not, then the variables are not declared in the workspace. In other words, if the variables are outputs of other functions, they need to be specified accordingly. E.g.
[tempo, t_media_filtrata_t] = my_func(arg1, arg2)
now you can call
[x] = residuo([1.5, 18],tempo,t_media_filtrata_t)
2 Kommentare
Mischa Kim
am 24 Feb. 2014
Bearbeitet: Mischa Kim
am 24 Feb. 2014
Here you go...
- Within the function, you call the same function, again, recursively. Is this what you are trying to do?
opt = optimset ( 'Display' , 'iter','MaxIter' ,20 );
[x, fval, exitflag, output] = fminsearch ( residuo,x_ini,opt )
- And even if this is planned, you need to properly call the function with all of its input arguments.
- Finally, you are using residuo also as a variable.
residuo = sqrt((sum(misfit))/length(tempo));
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