How can I combine those lines into a surface (plot3) to surface

I want to draw a surface between the lines

clear

clc

T_1_4=[1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4];

T_1_2=[1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2];

T_1_0=[1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0];

T_0_8=[0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8];

T_0_6=[0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6];

for i=1:5

SOI = xlsread('internal_2', i, 'A2:A11');

T (:,:,i)= xlsread('internal_2', i, 'D2:D11');

end

plot3(T_1_4,SOI,T(:,:,1))

hold on

grid on

plot3(T_1_2,SOI,T(:,:,2))

plot3(T_1_0,SOI,T(:,:,3))

plot3(T_0_8,SOI,T(:,:,4))

plot3(T_0_6,SOI,T(:,:,5))

xlabel('Equivelent ratio');ylabel('Start of ignition "BBDC" (Degree)');zlabel('Torque')

Answer 1

[Star Strider]

See if this does what you want:

T_Mtx = ([1.4; 1.2; 1; 0.8; 0.6] * ones(1,10))';
SOI = xlsread('internal_2.xlsx', 1,   'A2:A11');
SOI_Mtx = SOI * ones(1,5);
for i=1:5
    T(:,i)= xlsread('Mohammad FAQIR internal_2.xlsx', i, 'D2:D11');
end
surf(T_Mtx,SOI_Mtx,T)
xlabel('Equivelent ratio');ylabel('Start of ignition "BBDC" (Degree)');zlabel('Torque')

I simplified your code a bit, as well.

[Mohammad FAQIR]

Thanks,

could u explain what does " * ones(1,10) " do ?

[Star Strider]

As always, my pleasure.

‘could u explain what does " * ones(1,10) " do ?’

It uses vector-matrix multiplication to expand the column vectors to a matrix of identical row elements. It is an efficient way of essentially using the repmat function, for single row vectors.

[Mohammad FAQIR]

Thanks,

I hope you have a nice day

[Star Strider]

As always, my pleasure.

You, too!