加载中…MATLAB中Max的用法
(2012-07-25 14:33:57)
标签：
matlabmaxhelp文档杂谈 |
分类： MatLab学习 |
Matlab中max函数在矩阵中求函数大小的实例如下:
C = max(A)
返回一个数组各不同维中的最大元素。
如果A是一个向量，max(A)返回A中的最大元素。
如果A是一个矩阵，max(A)将A的每一列作为一个向量，返回一行向量包含了每一列的最大元素。
如果A是多为数组，max(A) treats the values
along the first non-singleton dimension as vectors, returning the
maximum value of each vector.
C = max(A,B)
返回一个和A和B同大小的数组，其中的元素是从A或B中取出的最大元素。
C = max(A,[],dim)
返回A中有dim指定的维数范围中的最大值。
[C,I] = max(...)
找到A中那些最大值的索引位置，将他们放在向量I中返回。如果这里有多个相同最大值时，返回的将是第一个的索引。
MATLAB Function Reference
max
Maximum elements of an
array
Syntax
C = max(A)
C = max(A,B)
C = max(A,[],dim)
[C,I] = max(...)
Description
C = max(A) returns the largest
elements along different dimensions of an
array.
If A is a vector, max(A) returns the
largest element in A.
If A is a matrix, max(A) treats the
columns of A as vectors, returning a row vector containing the
maximum element from each column.
If A is a multidimensional array,
max(A) treats the values along the first
non-singleton dimension as vectors, returning the
maximum value of each vector.
C = max(A,B) returns an array the
same size as A and B with the largest elements taken from A or
B.
C = max(A,[],dim) returns the
largest elements along the dimension of A specified by scalar dim.
For example, max(A,[],1) produces the maximum values along the
first dimension (the rows) of A.
[C,I] = max(...) finds the indices
of the maximum values of A, and returns them in output vector I. If
there are several identical maximum values, the index of the first
one found is returned.
Remarks
For complex input A, max returns the
complex number with the largest complex modulus (magnitude),
computed with max(abs(A)), and ignores the phase angle, angle(A).
The max function ignores NaNs.
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