Permute 2 2.5.9
Posted : admin On 04.04.2020A = 1 2 3; 4 5 6; 7 8 9;Today reshaping the mátrix A to form a row vector gives B. M = 1 4 7 2 5 8 3 6 9;Analyzing polynomial functionf(times) = (7x+6x^2+3x^3)mod 9by putting beliefs for 'back button' ranging from (1.,9) since there are usually 9 components.Old flame. For back button=1, f(x) = 16 mod 9 = 7For times=2, f(a) = 62 mod 9 = 8 till x = 9 outcomes in permute. Pérmute = 7 8 3 1 2 6 4 5 9;permute vector gives positions.Using matrix indexing, the roles of components in row vector B are arranged based to permute vector resulting in enc. Enc = B(permute);%enc = 3 6 7 1 4 8 2 5 9Thus, the initial position of elements in A provides been shuffled showed by newA.
NéwA = 3 1 2;6 4 5;7 8 9;%reshaping newA = (enc,3,3)To obtain unique matrix back, newA can be reshaped into a row vector 'dec' again. Dec = 3 6 7 1 4 8 2 5 9;dec(permute) = dec;dec = 1 4 7 2 5 8 3 6 9;orgmat= reshape(dec,3,3)orgmat = 1 2 3; 4 5 6; 7 8 9;How will dec(permute)= december functions in this? The cause it functions can be because december = enc = B(pérmute).If you basically substitute this into déc(permute) = dec; yóu get dec(permute) = B(permute) (only replace the 2nd december.) This provides you dec=B.This is usually a common result. For example, for any permutation vector p and vectors Times and Y after that if you set X(p)=Y(p) after that Back button=Y because your placing the p'th element from Con into the p'th element in Times thus precisely preserving Y.Finally, since december=B and you produced B using B=reshape(A,1,9) then of training course, reshape(dec,3,3) gives you back A as this is definitely equivalent to réshape(B,3,3) which simply undoes the original reshape.I wish this helps.
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Numpy.random.permutation¶ numpy.random.permutation (x) ¶ Randomly permute a sequence, or return a permuted range. If x is a multi-dimensional array, it is only shuffled along its first index. Reshape a 3D matrix. Learn more about reshape, repmat. I agree with the first part of that comment, but not the second part. By the description ('I use this 3D mesh to compute some values so that I have also a 3D matrix A of size 3-by-3-by-3') I still stand by my suggested code. Jun 06, 2018 Permute 2 offers easy-to-use drag-and-drop video conversion.Features Easy to use, drag-and-drop video converting Dead sexy interface Easy presets for things like xBox, Apple TV, iPhone, etc. Custom presets or modify existing ones 64-bit all the way to the core Can take advantag. Generating Random Permutations J org Arndt 30-October-2009 (revised 10-March-2010) A thesis submitted for the degree of Doctor of Philosophy of the Australian National University.