How can I call a value in side the a function which is already evaluated.

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Chaudhary P Patel 2022-9-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1812100-how-can-i-call-a-value-in-side-the-a-function-which-is-already-evaluated

评论： Walter Roberson 2022-9-27

%% knt i calculated here.
nf=max(elem(:,4));
maxfl=max(elf(:,1));
for flno = 1:1:maxfl
   for i=elf(1,1)
       for j=1:1:nf
           p=CGx(j)-CGx(i); 
           au=[1,0,0;0,1,p;0,0,1];
           bu=(au)';
           kse=eval(['KSE',num2str(flno),'l']);
           k1=kse(1:nodof,1:nodof);
           eval(['Ktts',num2str(flno),'l','=[k1,-k1*au;-bu*k1,bu*k1*au]']); %Transformed Stiffness matrix of each floor (6x6)
       end
   end
end
%% I have to call the knt inside the loop, how can i call please suggest me.
function [t,k_hat, R, keyp, key,Keyp,Key, delu, k_T, delF_hat, deludot, u0, udot0, uddot0] = NewmarkNon( t,Ug, delF, dt, u_t, u_c,F1, KGf, C, MGf, Rt, Rc, R, gamma, beta, key, k_T,u,udot,uddot)
 knt=eval(['Ktts',num2str(n),'l']);  
end

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Stephen23 2022-9-27

"is there any way to proceed this operation without changing the code?"

No.

Chaudhary P Patel 2022-9-27

Thank you so much sir.

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采纳的回答

Bruno Luong 2022-9-27

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1812100-how-can-i-call-a-value-in-side-the-a-function-which-is-already-evaluated#answer_1061470

在 MATLAB Online 中打开

If you want to retrieve value of a variable from the parent workspace inside a function without passing it as argument onstead of normal eval do this

knt = evalin('caller','Ktts',num2str(n),'l'])

8 个评论
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Chaudhary P Patel 2022-9-27

ok sir.

Thank you so much.

Walter Roberson 2022-9-27

Postponing fixing your code by locking in using a hack like this is just going to result in it taking even longer to fix your code later.

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更多回答（1 个）

Walter Roberson 2022-9-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1812100-how-can-i-call-a-value-in-side-the-a-function-which-is-already-evaluated#answer_1061085

It is not possible to do what you want to do using eval(). You will need to rewrite your code.

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Walter Roberson 2022-9-26

在 MATLAB Online 中打开

Do not store variables like KSE3l -- use a cell array like KSEl{n} instead. Or possibly a multidimensional array.

Likewise do not store into Ktts*l -- use a cell array like Kttsl{n} instead.

%% knt i calculated here.
nf=max(elem(:,4));
maxfl=max(elf(:,1));
for flno = 1:1:maxfl
   for i=elf(1,1)
       for j=1:1:nf
           p=CGx(j)-CGx(i); 
           au=[1,0,0;0,1,p;0,0,1];
           bu=(au)';
           kse = KSEl{flno};
           k1 = kse(1:nodof,1:nodof);
           Kttsl{flno} = [k1,-k1*au;-bu*k1,bu*k1*au]']); %Transformed Stiffness matrix of each floor (6x6)
       end
   end
end

When you call your function (not shown in your code) pass in Kttsl as well.

%% I have to call the knt inside the loop, how can i call please suggest me.
function [t,k_hat, R, keyp, key,Keyp,Key, delu, k_T, delF_hat, deludot, u0, udot0, uddot0] = NewmarkNon( t,Ug, delF, dt, u_t, u_c,F1, KGf, C, MGf, Rt, Rc, R, gamma, beta, key, k_T, u, udot, uddot, Kttsl)
  n = something appropriate   
  knt = Kttsl{n};  
end