How to check two unbalanced matrix?

For example:

X=[1;2;3;4;5];
Y=[2];

if this matched than i should get Z as matched value like this

 Z=[2];

Answer 1

[Star Strider]

I don’t understand what you are doing or what ‘matched’ means.

It would seem that the intersect function might be what you want:

Z = intersect(X,Y)

that would produce:

Z =

       2

[Matlab111]

sir, this my matrix:

 a=[Columns 1 through 8

   89.8731   79.3812  117.8973   32.8234   52.5252   24.9220   93.4288   86.0811

Columns 9 through 16

101.4806   14.7224    6.6336  100.5701   51.7163   91.1254  100.2094   38.9440

Columns 17 through 24

   71.7236   96.1804   62.6327   38.1159  112.2841  109.5051   31.7090   74.1488

Columns 25 through 32

   65.7694   94.7867   93.1744   54.0132   55.5098  122.1975   85.5061   96.3618

Columns 33 through 40

   51.6636   99.8875   31.5059   86.1089   86.4142  127.3963   44.2550   58.4428

Columns 41 through 48

   28.2850   31.3253   94.2205  102.1114   19.4583   32.4014   89.0007   

 51.7007];

 b=[28.2850];

if 'b' is matching with 'a' than i have to display same value.

 Z=[28.2850];

[Star Strider]

I would use intersect, as I suggested in my original Answer. If ‘b’ is an element of ‘a’, then ‘Z’ will display it. If it is not, ‘Z’ will simply return an empty matrix.

[Image Analyst]

It may not work with floating point numbers if the numbers were arrived at in different ways. See http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F

[Star Strider]

True.

In that event, it would be necessary to use the R2014b version of round on both, or equivalently:

roundn = @(x,n) fix(x.*10.^n)./10.^n;

wnere x is the number (or matrix) to be rounded, and n the number of digits to be rounded to.

Answer 2

[Shoaibur Rahman]

Another way may be:

X=[1;2;3;4;5];
Y=[2];
Z = X(X==Y)