Smooth

HELLO, I HAVE A QUESTION I have matrix, but the data is not good there, i need to use function Smooth. but when i try i get a problem every time. maybe someone has an exampl. how i can use smooth for matrix?

thanks

[SCd merged from Duplicate]

I have this task. we have a car with 15 elements in it. for each element i have a matrix of possible values. I need to use smooth for each matrix

Can you help me thanks

Answer 1

[Wayne King]

smooth operates a column vector, so you could loop over the columns of the matrix; I don't know how big your matrix is.

X = randn(100,100);
Y = zeros(size(X));
for nn = 1:100
Y(:,nn) = smooth(X(:,nn));
end

[Dmitry]

i have this task. we have a car with 15 elements in it. for each element i have a matrix of possible values. I need to use smooth for each matrix

[Wayne King]

That doesn't give me the size of the matrix

[Dmitry]

4 matrix

189x3

22x2

366x2

345x2

Answer 2

[Wayne King]

From the part Sean merged in, perhaps it doesn't make sense in your application to smooth the columns of the matrix separately. Maybe you want filter the entire matrix at once.

Here just using one possible lowpass filter.

    h = [-0.0758 -0.0296 0.4976 0.8037 0.2979 -0.0992 -0.0126 0.0322]';
    h = h*h';
    X = randn(10,10);
    Y = filter2(h,X);

basically you can use any number of lowpass FIR filters including a strict moving average filter. Again, without knowing your application, it's difficult to say which smoothing method is most appropriate.

[Dmitry]

189x3

22x2

366x2

345x2

[Wayne King]

so maybe it makes sense to filter the columns separately as I showed you how to do in my first post. I don't know, are the spatial characteristics encoded in the matrix of significance or do just the columns matter?

[Dmitry]

exampl

73572e+05 64

73571e+05 73

[Dmitry]

size -

189x3

22x2

366x2

345x2

data

73572e+05 64

73571e+05 73