基于MATLAB的BP学习算法

function [alphabet,targets] = prprob() %PRPROB Character recognition problem definition % % [ALHABET,TARGETS] = PRPROB() % Returns: % ALPHABET - 35x26 matrix of 5x7 bit maps for each letter. % TARGETS - 26x26 target vectors. % Mark Beale, 1-31-92 % Revised 12-15-93, MB. % Copyright 1992-2002 The MathWorks, Inc. letterA = [0 0 1 0 0 ... 0 1 0 1 0 ... 0 1 0 1 0 ... 1 0 0 0 1 ... 1 1 1 1 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ]'; letterB = [1 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 1 1 1 0 ]'; letterC = [0 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 1 ... 0 1 1 1 0 ]'; letterD = [1 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 1 1 1 0 ]'; letterE = [1 1 1 1 1 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 1 1 1 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 1 1 1 1 ]'; letterF = [1 1 1 1 1 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 1 1 1 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ]'; letterG = [0 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 1 1 ... 1 0 0 0 1 ... 0 1 1 1 0 ]'; letterH = [1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 1 1 1 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ]'; letterI = [0 1 1 1 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 1 1 1 0 ]'; letterJ = [1 1 1 1 1 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 1 0 1 0 0 ... 0 1 0 0 0 ]'; letterK = [1 0 0 0 1 ... 1 0 0 1 0 ... 1 0 1 0 0 ... 1 1 0 0 0 ... 1 0 1 0 0 ... 1 0 0 1 0 ... 1 0 0 0 1 ]'; letterL = [1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 1 1 1 1 ]'; letterM = [1 0 0 0 1 ... 1 1 0 1 1 ... 1 0 1 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ]'; letterN = [1 0 0 0 1 ... 1 1 0 0 1 ... 1 1 0 0 1 ... 1 0 1 0 1 ... 1 0 0 1 1 ... 1 0 0 1 1 ... 1 0 0 0 1 ]'; letterO = [0 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 0 1 1 1 0 ]'; letterP = [1 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 1 1 1 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ... 1 0 0 0 0 ]'; letterQ = [0 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 1 0 1 ... 1 0 0 1 0 ... 0 1 1 0 1 ]'; letterR = [1 1 1 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 1 1 1 0 ... 1 0 1 0 0 ... 1 0 0 1 0 ... 1 0 0 0 1 ]'; letterS = [0 1 1 1 0 ... 1 0 0 0 1 ... 0 1 0 0 0 ... 0 0 1 0 0 ... 0 0 0 1 0 ... 1 0 0 0 1 ... 0 1 1 1 0 ]'; letterT = [1 1 1 1 1 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ]'; letterU = [1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 0 1 1 1 0 ]'; letterV = [1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 0 1 0 1 0 ... 0 0 1 0 0 ]'; letterW = [1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 0 0 1 ... 1 0 1 0 1 ... 1 1 0 1 1 ... 1 0 0 0 1 ]'; letterX = [1 0 0 0 1 ... 1 0 0 0 1 ... 0 1 0 1 0 ... 0 0 1 0 0 ... 0 1 0 1 0 ... 1 0 0 0 1 ... 1 0 0 0 1 ]'; letterY = [1 0 0 0 1 ... 1 0 0 0 1 ... 0 1 0 1 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ... 0 0 1 0 0 ]'; letterZ = [1 1 1 1 1 ... 0 0 0 0 1 ... 0 0 0 1 0 ... 0 0 1 0 0 ... 0 1 0 0 0 ... 1 0 0 0 0 ... 1 1 1 1 1 ]'; alphabet = [letterA,letterB,letterC,letterD,letterE,letterF,letterG,letterH,... letterI,letterJ,letterK,letterL,letterM,letterN,letterO,letterP,... letterQ,letterR,letterS,letterT,letterU,letterV,letterW,letterX,... letterY,letterZ]; targets = eye(26);