paper 34 ：常见函数的举例（更新ing）2

在研究opencv，不是很难，但是需要换种思维来认知这个C/C++为编程函数的开源代码库，OK，我现在还是总结一些常用MATLAB的函数，随时更新，下一阶段就是opencv方面的认知了！

1.std

Standard deviation

Syntax
s = std(X)
s = std(X,flag)
s = std(X,flag,dim)

Examples
For matrix X
X =
1 5 9
7 15 22
s = std(X,0,1)
s =
4.2426 7.0711 9.1924
s = std(X,0,2)
s =
4.000
7.5056

2.reshape

Reshape array

Syntax
B = reshape(A,m,n)
  B = reshape(A,[m n])
  B = reshape(A,m,n,p,...)
  B = reshape(A,[m n p ...])
  B = reshape(A,...,[],...)

Examples
Reshape a 3-by-4 matrix into a 2-by-6 matrix.
  A =
  1 4 7 10
  2 5 8 11
  3 6 9 12

B = reshape(A,2,6)

B =
  1 3 5 7 9 11
  2 4 6 8 10 12
  B = reshape(A,2,[])

B =
1 3 5 7 9 11
2 4 6 8 10 12

巴特西