conv2 - Script command
Returns the Convolution of two 2-dimensional arrays.
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Syntax |
Description |
|---|---|
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out = conv2(A,B,mode) |
Computes the convolution of two 2-d dimensional matrices A and B. mode = 'full': computes the full convolution of A and B. 'same': computes the central part of the full convolution, result matrix C is restricted to the size of A, |
Example
In the following example, we computes the 'full' and 'same' convolution results of matrices A and B:
matA = [-5;-4;-3;-2;-1;0;1;2;3;4;5]*pi;
matB = [-3,-2,-1,0];
matCFull = conv2(matA, matB, 'full');
matCSame = conv2(matA, matB, 'same');
>?matCFull;
result:
47.1239 31.4159 15.708 0
37.6991 25.1327 12.5664 0
28.2743 18.8496 9.42478 0
18.8496 12.5664 6.28319 0
9.42478 6.28319 3.14159 0
0 0 0 0
-9.42478 -6.28319 -3.14159 0
-18.8496 -12.5664 -6.28319 0
-28.2743 -18.8496 -9.42478 0
-37.6991 -25.1327 -12.5664 0
-47.1239 -31.4159 -15.708 0
>?matCSame;
result:
15.708
12.5664
9.42478
6.28319
3.14159
0
-3.14159
-6.28319
-9.42478
-12.5664
-15.708
See Also
Functions, integrate, integrate2, max, min, interp, find, pinch, round, getdata, sum, length