MATLAB: How to get the product multiplication of element matrix with equal size

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How to get the product multiplication of element matrix with equal size? I tray with this, but failed

X=pascal(4);
Y=magic(4);
Z(i,j)=X(i,j)*Y(i,j)

Best Answer

Try

    X=pascal(4);
    Y=magic(4);
    Z=X*Y
    Z=X.*Y

returns

    Z =
        34    34    34    34
        69   101   101    69
       125   217   219   119
       206   396   403   185
    Z =
        16     2     3    13
         5    22    30    32
         9    21    36   120
         4    56   150    20

Related Solutions

MATLAB: Vector/martix limit size

Your code is buggy, and that concept will fail for 3D arrays. Try this instead:

isrow(v) && numel(v)==3

isequal(size(v),[1,3])

Lets look at the bug in your code. First note that the LHS will always be true, as no value is zero:

>> all([1,3])
ans = 1

So the LHS is always equal to 1, which you then compare against the size of v:

>> v = 1:4;
>> all([1,3])==size(v)
ans =
  1  0
>> 1==size(v) % exactly equivalent

ans =
  1  0

this will never be all true (which if requires if the condition is non-scalar), unless v is a scalar:

>> v = 4;
>> all([1,3])==size(v)
ans =
  1  1
>> 1==size(v) % exactly equivalent
ans =
  1  1

The error was putting the parenthesis in the wrong place, it should have been right at the end:

all([1,3]==size(v))

but note that this will still fail for ND arrays. The code at the top of this answer will work for any size array.

MATLAB: How to increase dot size

You can always plot a symbol at the point of intersection

x = -10:10;
y = x;
y1 = -x;
plot(x,y,x,y1,'b');
hold on;
h = plot(0,0,'ko','MarkerfaceColor',[0 0 0]);

If you really want to make the size bigger than the default, use the MarkerSize property.

Wayne

Best Answer

Related Solutions

MATLAB: Vector/martix limit size

MATLAB: How to increase dot size

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