problem with input arguments

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

[Mischa Kim]

How and where from are you calling the function?

[Gianmario]

from the command window: [x]=residuo([1.5, 18],tempo,t_media_filtrata_t)

Answer 1

[Iain]

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);

[Gianmario]

but both inputs are linear matrix developed by other function. In the previously function i put them into output. Not a nested but two distinct function

function [x,y]=first_function(a,b)
end

function [z]=second_function(x,y)
end

[Iain]

Check that the variables exist before calling residio?

Answer 2

[Image Analyst]

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.

Answer 3

[Mischa Kim]

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)

[Gianmario]

i tried it on the command window and it says that both of them are variables.

[Mischa Kim]

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));