If A= [1001] and B=[0101], what will be the value of the multiplication of A and B in MATLAB? I am new here. So, having trouble understanding

Question

Hasin 2024-1-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2074586-if-a-1001-and-b-0101-what-will-be-the-value-of-the-multiplication-of-a-and-b-in-matlab-i-am-n

回答： Udit06 2024-2-12

2 个评论
显示无隐藏无

Stephen23 2024-1-26

编辑：Stephen23 2024-1-26

在 MATLAB Online 中打开

"what will be the value of the multiplication of A and B in MATLAB?"

A = [1001]
A = 1001
B = [0101]
B = 101
A*B
ans = 101101

But I suspect that you actually meant A and B to be vectors... perhaps:

A = [1,0,0,1]
A = 1×4
     1     0     0     1
B = [0,1,0,1]
B = 1×4
     0     1     0     1
A.*B % element-wise array multiplication
ans = 1×4
     0     0     0     1
A*B % matrix multiplication
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 operate on each element of the matrix individually, use TIMES (.*) for elementwise multiplication.

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

Rik 2024-1-26

在 MATLAB Online 中打开

Or perhaps a binary encoding was intended, in which case:

A=0b1001,B=0b0101
A = uint8
    9
B = uint8
    5
A*B
ans = uint8
    45

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Udit06 2024-2-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2074586-if-a-1001-and-b-0101-what-will-be-the-value-of-the-multiplication-of-a-and-b-in-matlab-i-am-n#answer_1406686

Hi Hasin,

The multiplication of two binary numbers A =

and B =

follows the shift and add method, similar to long multiplication of decimal numbers. Let's multiply them as you would on paper:

1 0 0 1 (A)

× 0 1 0 1 (B)

------------

1 0 0 1 (A * 1)

0 0 0 0 (A * 0, shifted one position to the left)

1 0 0 1 (A * 1, shifted two positions to the left)

+0 0 0 0 (A * 0, shifted three positions to the left)

------------

1 0 1 1 0 1 (Result)

------------

Hence, the resultant of multiplication of A and B comes out to be

which is equivant to 45 in decimal number system.

You can refer to bin2dec and dec2bin functions for interconversion between the two number systems.

https://www.mathworks.com/help/matlab/ref/bin2dec.html

https://www.mathworks.com/help/symbolic/sym.dec2bin.html

I hope it helps.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

If A= [1001] and B=[0101], what will be the value of the multiplication of A and B in MATLAB? I am new here. So, having trouble understanding

2 个评论
显示无隐藏无

回答（1 个）

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

另请参阅

类别

标签

Community Treasure Hunt

If A= [1001] and B=[0101], what will be the value of the multiplication of A and B in MATLAB? I am new here. So, having trouble understanding

2 个评论 显示 无隐藏 无

回答（1 个）

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

另请参阅

类别

标签

Community Treasure Hunt

2 个评论
显示无隐藏无

0 个评论
显示 -2更早的评论隐藏 -2更早的评论