Appending Arrays at the END!

I have three arrays of sizes:

1) A[]=839063*1; (ZEROS)

2) B[]=4393*1; (some values) {example [0.1 0.2 0.3 . . . . ] random values }

3) C[]=191*1; (some values randomized)

Here I need to multiply every element of C[] with EACH element of B[]. like

for i= 1:length(B)

ANS = B(i) * C; { example 0.1 * [1 2 3 4 5 6 7 8 9 . . . . . 191] like this I have to do 4393 times}

END

Then I have to store all these values in array A[] and I have to append these values at the end of the array after each for loop.

Currently I am using the below algorithm to resolve this, and is not working. Can you please tell me a better way to do this????

for i = 1:length(A)
    for j = 1:length(B)
        for k = 1:191
            A(i)=B(j)*C(k);
        end       
    end
    i=i*(191);
end

Answer 1

[James Tursa]

E.g.,

A = B * C.'; % outer product
A = A(:); % turn into column vector

[Sanchit Sharma]

Error using *

Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in

the second matrix. To perform elementwise multiplication, use '.*'.

This is the message shown, Please note that the arrays are NOT of same sizes.

[James Tursa]

Then the matrices are not the sizes you told me. What is the output of this:

size(B)
size(C)

[Sanchit Sharma]

Apologies for misunderstanding!

size(A)=839063

size(B)=4393

size(C)=191

Here is the explanation of my problem:

array A =[ (1st element of B) X C() ; (2nd element of B) X C(); (3rd element of B) X C(); . . ............................. (4393th element of B) X C() ];

total elements in A = 4393 X 191 = 839063;

This is exactly what I want.

[James Tursa]

No. Please run the code size(B) and size(C) and paste the output here.

[Sanchit Sharma]

>> size(PULSES1212) % This is Matrix A()

ans =

839063 1

>>

>> size(Height) % This is Matrix B()

ans =

4383 1

>> size(PULSES) % This is MATRIX C()

ans =

191 1

[James Tursa]

And this:

PULSES1212 = Height * PULSES.';

[Sanchit Sharma]

This is the error coming.

Error using *

Incorrect dimensions for matrix multiplication. Check that the number of columns in the first matrix matches the number of rows in

the second matrix. To perform elementwise multiplication, use '.*'.

[madhan ravi]

+1 , it works !

[Sanchit Sharma]

I got it Thanks a lot!