matrix using for loop

I have a question regarding matrix multiplication using for loop for a general matrix

n1=1; n2=4; n3=4; n4=2;

Ai is the general matrix from this to find the value of A1 ,A2 ,A3 and A4

Ai= [ni ni^2; cos(ni) sin(ni)]

Display of matrix A1,A2,A3 and A4

Display of A1*A2*A3*A4.

[KSSV]

What have you attempted?

[shiv gaur]

pl write the code

[shiv gaur]

for i=1:4

n1=1; n2=4; n3=4; n4=2;
%Ai is the general matrix from this to find the value of A1 ,A2 ,A3 and A4
 Ai= [ni ni^2; cos(ni) sin(ni)] 

display([A1 A2 A3 A4])
end

[Walter Roberson]

n1=1; n2=4; n3=4; n4=2;
 Ai= [ni ni^2; cos(ni) sin(ni)] 

What that is supposed to tell you is that the matrices are

A1 = [n1, n1^2; cos(n1), sin(n1)]
A2 = [n2, n2^2; cos(n2), sin(n2)]
A3 = [n3, n3^2; cos(n3), sin(n3)]
A4 = [n4, n4^2; cos(n4), sin(n4)]

[shiv gaur]

yes

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[shiv gaur]

pl any one write the code of multiplication of this

[Walter Roberson]

expression_that_pulls_out_A1 * expression_that_pulls_out_A2 * expression_that_pulls_out_A3 * expression_that_pulls_out_A4

For expression_that_pulls_out_An substitute appropriate code according to how you choose to implement creating variables in a loop. For example if you put them as rows in a table object, MYTABLE then

MYTABLE{1,1} * MYTABLE{2,1} * MYTABLE{3,1} * MYTABLE{4,1}

[shiv gaur]

write code

[Walter Roberson]

I just did.

%{
MYTABLE{1,1} * MYTABLE{2,1} * MYTABLE{3,1} * MYTABLE{4,1}
%}

That is code.

I will give you a further hint:

P = cell(10,1);
for K = 1 : 10
    P{K} = randi(10,1,50);
end
Total = 0;
for K = 1 : 10
    Total = Total + P{K};
end
plot(Total)