替换矩阵的值 [英] Substituting values of a matrix
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问题描述
说我有以下两个矩阵:
>> x = [1 4 3; 6 4 3; 6 9 3; 2 4 3; 5 4 0; 5 3 1; 6 4 7];
>> y = [0 0 1; 1 1 0; 1 1 0; 0 1 1; 0.2 0.8 0.54; 1 1 1; 0 0 0];
在其中您可以将x
视为某些图像,并将y
每个x
元素的隶属度视为某个感兴趣区域.
Where you can think of x
as some image, and y
the degree of membership of of each element of x
to some region of interest.
假设我将x
中具有隶属度= 1的那些元素设置为1
,将其他元素设置为0
,如下所示:
Say I set those elements in x
that have degree of membership = 1 to 1
and the other elements to 0
as follows:
x = zeros(size(y));
x(y==1) = 1;
在这种情况下,我将获得以下输出:
In which case I will have the following output:
0 0 1
1 1 0
1 1 0
0 1 1
0 0 0
1 1 1
0 0 0
现在,对于0
的元素,如何在相应位置将其值替换为y
的值?
Now, for the elements of 0
, how can I substitute their values with the value of y
in the corresponding location?
谢谢.
推荐答案
尝试一下:
x(x==0)=y(x==0);
回答:
x =
0 0 1.0000
1.0000 1.0000 0
1.0000 1.0000 0
0 1.0000 1.0000
0.2000 0.8000 0.5400
1.0000 1.0000 1.0000
0 0 0
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