index exceeds array bounds

%%%%I am trying to create a programm which gets values from an excel file

for fl=1:1:dof(de,4)

for i=1:1:ne

CKx(fl)=sum(b(i)*ckx(i))./sum(b(i));

CKy(fl)=sum(c(i)*cky(i))./sum(c(i));

end

end

[Chaudhary P Patel]

here

fl=3

ne=29

b and c is vector,

ckx and cky is matrix size 29 by 1

[Chaudhary P Patel]

this is only part of the programming in which i am getting error.

[KSSV]

If you try to access more number of elements then present, then you will get this error.

A = rand(1,5) ; 
A(6)   % error 

[Chaudhary P Patel]

sir what did you want more information?

[Chaudhary P Patel]

%%this is my complelte programming

clear;

%--------------------------------------------------------------------------

inpf=input('File name of input file data ','s');

M=importdata([inpf,'.xlsx']);

nod=M.data.Node;

nj=max(nod(:,1));

elem=M.data.Element;

ne=max(elem(:,1));

Ec=[];

Ec=elem(:,5);

pc=[];

pc=elem(:,8);

bc=elem(:,6);

dc=elem(:,7);

% %--------------------------------------------------------------------------

for i=1:ne

xf=nod(elem(i,3),2);

x0=nod(elem(i,2),2);

yf=nod(elem(i,3),3);

y0=nod(elem(i,2),3);

zf=nod(elem(i,3),4);

z0=nod(elem(i,2),4);

L(i,1)=sqrt((xf-x0)^2+(yf-y0)^2+(zf-z0)^2);

A(i,1)=elem(i,6)*elem(i,7);

Izz(i)=elem(i,6)*(elem(i,7)^3)/12;

Iyy(i)=elem(i,7)*(elem(i,6)^3)/12;

ckx(i)=xf;

cky(i)=yf;

xcgf(i,1)=elem(i,12);

ycgf(i,1)=elem(i,13);

end

%%DOF of the element..............

dof=[];

for de=1:1:ne

dof(de,1)=elem(de,1);%Element Number

dof(de,2)=elem(de,2);%First node number

dof(de,3)=elem(de,3);%Second node number

dof(de,4)=elem(de,4);%Floor Number

for fl=1:1:dof(de,4)

dof(de,5)=1+(fl-1)*3;

dof(de,6)=2+(fl-1)*3;

dof(de,7)=3+(fl-1)*3;

dof(de,8)=4+(fl-1)*3;

dof(de,9)=5+(fl-1)*3;

dof(de,10)=6+(fl-1)*3;

end

end

% % % %Generation of element stiffness matrix for Columns

% % %--------------------------------------------------------------------------

for i=1:1:ne

b=12*Ec(i).*Iyy(i)/(L(i).^3);

c=12*Ec(i).*Izz(i)/(L(i).^3);

d=b.*xcgf(i);

e=(c.*(xcgf(i)).^2)+(b*(ycgf(i)).^2);

end

% center of stiffness of each floor level

for fl=1:1:dof(de,4)

for i=1:1:ne

CKx(fl)=sum(b(i).*ckx(i))./sum(b(i));

CKy(fl)=sum(c(i).*cky(i))./sum(c(i));

end

end

[KALYAN ACHARJYA]

@KSSV shown an example for a similar error. Suppose you have an array "A" having length 5

A = rand(1,5) ; 

Now if you want to access the 6th index element of A,then it shows the simmilar error, as A have length 5th only.

A(6)   % error 

Same case may happen in your code, you want to access the particular index element from the data file, but its exceeds its actual length/size

[Chaudhary P Patel]

Kalyan Acharjya sir please resolve my problem.

[KALYAN ACHARJYA]

Sir, Sure I will try

[KSSV]

@Pramod we cannot help you unless we know your complete code and the variables.

Answer 1

[KSSV]

m = dof(de,4) ;   % I hope this is a number 
ne = length(b) ;   % dimensions of b and ckx, cky should be same 
Ckx = cell(m,ne) ;  % cell because I assume the ouput stored is array as you have used ./
Cky = cell(m,ne) ; 
for fl=1:1:m
 for i=1:1:ne
    CKx{fl,i}=sum(b(i)*ckx(i))./sum(b(i));
    CKy{fl,i}=sum(c(i)*cky(i))./sum(c(i));
 end
end