Occasionally we want to use a new filter that Matlab does not have. The code below is a simple generic template for implementing filters. [ M , N ] = size ( x ) ; y = zeros ( size ( x )) ; r = 1 ; % Adjust for desired window size for n = 1 + r : N - r for m = 1 + r : M - r % Extract a window of size (2r+1)x(2r+1) around (m,n) w = x ( m + ( - r : r ) , n + ( - r : r )) ; % ... write the filter here ... y ( m , n ) = result ; end end
These functions are also available for general use; they are named after the datatype that they return, and they always take a single argument. Functions that specify the semantics of operators defined in [XML Path Language (XPath) 3.1] and [XQuery 3.1: An XML Query Language]. These exist for specification purposes only, and are not intended ...
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Four resistors are connected in a square as shown