matlab- 数组的常用函数

>> a=[1,2,3]

a =

     1     2     3

>> sort(a)

ans =

     1     2     3

>> sum(a)

ans =

     6

>> min(a)

ans =

     1

>> max(a)

ans =

     3

>> b=[6,7,8]

b =

     6     7     8

>> a+b

ans =

     7     9    11

>> 3*a

ans =

     3     6     9

>> cat(1,a,b)

ans =

     1     2     3
     6     7     8

>> cat(2,a,b)

ans =

     1     2     3     6     7     8

>> help cat
 cat Concatenate arrays.
    cat(DIM,A,B) concatenates the arrays A and B along
    the dimension DIM. 
    cat(2,A,B) is the same as [A,B].
    cat(1,A,B) is the same as [A;B].
 
    B = cat(DIM,A1,A2,A3,A4,...) concatenates the input
    arrays A1, A2, etc. along the dimension DIM.
 
    When used with comma separated list syntax, cat(DIM,C{:}) or
    cat(DIM,C.FIELD) is a convenient way to concatenate a cell or
    structure array containing numeric matrices into a single matrix.
 
    Examples:
      a = magic(3); b = pascal(3);
      c = cat(4,a,b)
    produces a 3-by-3-by-1-by-2 result and
      s = {a b};
      for i=1:length(s),
        siz{i} = size(s{i});
      end
      sizes = cat(1,siz{:})
    produces a 2-by-2 array of size vectors.
     
    See also num2cell.

    Overloaded methods:
       inline/cat
       memmapfile/cat
       fittype/cat
       codistributed/cat
       xregpointer/cat
       coninputfactor/cat
       InputOutputModel/cat
       ordinal/cat
       nominal/cat
       dataset/cat
       categorical/cat
       sym/cat

    Reference page in Help browser
       doc cat

>> c=[7,8,9;0,1,2]

c =

     7     8     9
     0     1     2

>> d=[2,4,6;5,7,9]

d =

     2     4     6
     5     7     9

>> cat(1,c,d)

ans =

     7     8     9
     0     1     2
     2     4     6
     5     7     9

>> cat(2,c,d)

ans =

     7     8     9     2     4     6
     0     1     2     5     7     9

>> cat(3,c,d)

ans(:,:,1) =

     7     8     9
     0     1     2

ans(:,:,2) =

     2     4     6
     5     7     9

>>