matlab实现标准化
时间: 2023-08-23 21:11:24 浏览: 98
数据的标准化-matlab
在MATLAB中,可以使用两种方法实现数据的标准化。方法一是极值标准化,方法二是Z标准化。
方法一:极值标准化,通过将数据映射到\[0,1\]的范围内来实现标准化。具体实现代码如下:
```matlab
function out = mystand(A)
out = \[\];
n = size(A, 1);
minA = min(A);
maxA = max(A);
out = (A - repmat(minA, n, 1)) ./ repmat(maxA - minA, n, 1);
end
```
调用方法一的示例代码如下:
```matlab
A = randn(20, 20) * 2 + 1;
mystand(A);
```
方法二:Z标准化,也称为z-score标准化,通过将数据转化为符合标准正态分布的形式来实现标准化。具体实现代码如下:
```matlab
function out = myzscore(A)
temp = \[\];
dimension = size(A);
meanA = mean(A);
stdA = std(A);
for i = 1:numel(A)
temp = \[temp (A(i) - meanA) / stdA\];
end
out = reshape(temp, dimension);
end
```
调用方法二的示例代码如下:
```matlab
A = randn(20, 20) * 2 + 1;
myzscore(A);
```
以上是两种常用的MATLAB实现标准化的方法。\[1\]
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