Re: [問題] 關於 matlab 的這個指令

看板MATLAB作者siriusmax (成大機械研究僧-拔辣松)時間16年前 (2008/04/11 20:37)推噓6(6推 0噓 2→)

留言8則, 6人參與討論串1/1

※ 引述《jackycc (機奇)》之銘言： : PQ=paddedsize(size(f)); : 關於這個指令我在網頁上和書上都有看到 : 可是打再 matlab上卻說沒這指令 : 請問這指令到底可不可以用呢? 這個要自己加上去... 把下面這串存成paddedsize.m 吧變成副程式來用 %-----% function PQ = paddedsize(AB, CD, PARAM) %PADDEDSIZE Computes padded sizes useful for FFT-based filtering. % PQ = PADDEDSIZE(AB), where AB is a two-element size vector, % computes the two-element size vector PQ = 2*AB. % % PQ = PADDEDSIZE(AB, 'PWR2') computes the vector PQ such that % PQ(1) = PQ(2) = 2^nextpow2(2*m), where m is MAX(AB). % % PQ = PADDEDSIZE(AB, CD), where AB and CD are two-element size % vectors, computes the two-element size vector PQ. The elements % of PQ are the smallest even integers greater than or equal to % AB + CD -1. % % PQ = PADDEDSIZE(AB, CD, 'PWR2') computes the vector PQ such that % PQ(1) = PQ(2) = 2^nextpow2(2*m), where m is MAX([AB CD]). if nargin == 1 PQ = 2*AB; elseif nargin == 2 & ~ischar(CD) PQ = AB + CD - 1; PQ = 2 * ceil(PQ / 2); elseif nargin == 2 m = max(AB); % Maximum dimension. % Find power-of-2 at least twice m. P = 2^nextpow2(2*m); PQ = [P, P]; elseif nargin == 3 m = max([AB CD]); %Maximum dimension. P = 2^nextpow2(2*m); PQ = [P, P]; else error('Wrong number of inputs.') end %---% -- ︿●﹁, δ ⊕ 拔辣一顆外送唷／╯ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 140.116.127.32