MATLAB Answers

Operator '*' is not supported for operands of type 'cell' after changing the cell

52 views (last 30 days)
Marcelo Boldt
Marcelo Boldt on 3 Oct 2020
Commented: Marcelo Boldt on 6 Oct 2020
Hello,
So after realizing Runge Kutta I obtain a 49x1 cell that contains 7x7 double variables. Later on I need to remove one row and one column from each variable to obtain a 6x6 double. Finally I need to do operations with those variables but im getting this error Operator '*' is not supported for operands of type 'cell'.
Here my code:
for i=1:(L-1) % calculation loop
k_1 = A{i,:}*B{:,i}; % calculating coefficient
k_2 = (A{i,:} + (A{i+1,:}-A{i,:})/2)*(B{:,i}+0.5*h*k_1);
k_3 = (A{i,:} + (A{i+1,:}-A{i,:})/2)*(B{:,i}+0.5*h*k_2);
k_4 = (A{i+1,:})*(B{:,i}+k_3*h);
B{:,i+1} = B{:,i} + (h/6)*(k_1+2*k_2+2*k_3+k_4); % main equation
Ubertragungsmatrix_cell{i,:} = B{:,i};
Ubertragungsmatrix = cell2mat(Ubertragungsmatrix_cell);
% New_Last_vektor = mat2cell(cell2mat(Ubertragungsmatrix
end
U2 = Ubertragungsmatrix;
Ubertragungsmatrix(7:7:end,:) = [];
Last_vektor = num2cell(Ubertragungsmatrix(:,end));
Ubertragungsmatrix(:,end) = [];
Transfer_matrix = mat2cell(Ubertragungsmatrix,[6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6],[6]);
Pu_tr = cell(1,49);
Pn_tr = cell(1,49);
C = num2cell(reshape(Last_vektor(:, end), 3, []), 1);
% C1 = num2cell(cellfun(@(x) {reshape(x, [], 3)}, C));
% [Pu_tr, Pn_tr] = deal(C1{ : });
for ik = 1:49
Pu_tr{:,ik} = C{:,(ik-1)*2+1};
Pn_tr{:,ik} = C{:,2*ik};
Gesamtsystem_zylinder{ik,:} = Transfer_matrix{ik,:};
end
PV_tr = num2cell(Pu_tr',2);
PN_tr = str2double(Pn_tr');
for ih = 1:2:97
P_Tank_Reinforcement{ih,1} = - pinv(Gesamtsystem_Zylinder_Matrix{ih,2}) * PV_tr{ih,:}; %-> Here I get my error
end
How would you solve this?

  4 Comments

Show 1 older comment
madhan ravi
madhan ravi on 3 Oct 2020
Nope, let me do it this time. You select the entire text first and then press the code button.

Sign in to comment.

Answers (1)

Ayush Gupta
Ayush Gupta on 6 Oct 2020
The two values we are trying to multiply are cell array and one cannot multiply cell arrays.
You might be able to use
Cell1{i1}*Cell2{i2}
instead, to access the contents of the cell, rather than the cell itself

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!