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

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Chaudhary P Patel on 26 Sep 2022
Commented: Walter Roberson on 27 Sep 2022
%% 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
Stephen23 on 27 Sep 2022
"is there any way to proceed this operation without changing the code?"
No.
Chaudhary P Patel on 27 Sep 2022
Thank you so much sir.

Bruno Luong on 27 Sep 2022
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'])
Chaudhary P Patel on 27 Sep 2022
ok sir.
Thank you so much.
Walter Roberson on 27 Sep 2022
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.

Walter Roberson on 26 Sep 2022
It is not possible to do what you want to do using eval(). You will need to rewrite your code.
Walter Roberson on 26 Sep 2022
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
Walter Roberson on 26 Sep 2022

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