poster
2019-12-14, 20:13
我正在尝试使用递归（即[0 0 0 0 0 0 1 1，[0 0 0 0 1 0]，[0 0 0 0 1 1]，[0 0]写所有0和1s的6位排列0 1 0 0]，... [1 1 1 1 1 1]）。我正在跟踪从雅虎 (http://answers.yahoo.com/question/index?qid=20100526070957AAFMkSh)获得的提示！答案 (http://answers.yahoo.com/question/index?qid=20100526070957AAFMkSh)我有以下内容，但它并没有一直到最后，并且有重复的条目。
function [c] = myIEEEBaby_all_decimals(h, n) % n: number of characters more to add if n == 0 converter(h); return end in1 = [h 1]; in2 = [h 0]; converter(in1); converter(in2); if length(h) < n myIEEEBaby_all_decimals([in1], n-1) myIEEEBaby_all_decimals([in2], n-1) end end function [d] = converter(IEEE) % convert custom IEEE representation to decimal IEEE = [zeros(1,6-length(IEEE)), IEEE]; s = IEEE(1); characteristic = IEEE([2,3]); k = find(fliplr(characteristic)) - 1; c = sum(2.^k); fraction = IEEE([4:6]); f = sum(2.^-(find(fliplr(fraction)))); d = (-1)^s*2^(c-1)*(1+f); disp([num2str(IEEE),' : ', num2str(d)]); end 输出（MATLAB）只是：
>> myIEEEBaby_all_decimals([],6) 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5 0 0 0 0 1 1 : 0.875 0 0 0 0 1 0 : 0.625 0 0 0 1 1 1 : 0.9375 0 0 0 1 1 0 : 0.6875 0 0 1 1 1 1 : 1.875 0 0 1 1 1 0 : 1.375 0 0 1 1 0 1 : 1.625 0 0 1 1 0 0 : 1.125 0 0 0 1 0 1 : 0.8125 0 0 0 1 0 0 : 0.5625 0 0 1 0 1 1 : 1.75 0 0 1 0 1 0 : 1.25 0 0 1 0 0 1 : 1.5 0 0 1 0 0 0 : 1 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5 0 0 0 0 1 1 : 0.875 0 0 0 0 1 0 : 0.625 0 0 0 1 1 1 : 0.9375 0 0 0 1 1 0 : 0.6875 0 0 0 1 0 1 : 0.8125 0 0 0 1 0 0 : 0.5625 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5 0 0 0 0 1 1 : 0.875 0 0 0 0 1 0 : 0.625 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5
回答：
简单地从0迭代到2 6 -1并调用Matlab的dec2bin(...) (http://www.mathworks.com/help/techdoc/ref/dec2bin.html)函数。您可以使用sprintf(...) (http://www.mathworks.com/help/techdoc/ref/sprintf.html)将结果填充零。
更多&回答... (https://stackoverflow.com/questions/4839050)
function [c] = myIEEEBaby_all_decimals(h, n) % n: number of characters more to add if n == 0 converter(h); return end in1 = [h 1]; in2 = [h 0]; converter(in1); converter(in2); if length(h) < n myIEEEBaby_all_decimals([in1], n-1) myIEEEBaby_all_decimals([in2], n-1) end end function [d] = converter(IEEE) % convert custom IEEE representation to decimal IEEE = [zeros(1,6-length(IEEE)), IEEE]; s = IEEE(1); characteristic = IEEE([2,3]); k = find(fliplr(characteristic)) - 1; c = sum(2.^k); fraction = IEEE([4:6]); f = sum(2.^-(find(fliplr(fraction)))); d = (-1)^s*2^(c-1)*(1+f); disp([num2str(IEEE),' : ', num2str(d)]); end 输出（MATLAB）只是：
>> myIEEEBaby_all_decimals([],6) 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5 0 0 0 0 1 1 : 0.875 0 0 0 0 1 0 : 0.625 0 0 0 1 1 1 : 0.9375 0 0 0 1 1 0 : 0.6875 0 0 1 1 1 1 : 1.875 0 0 1 1 1 0 : 1.375 0 0 1 1 0 1 : 1.625 0 0 1 1 0 0 : 1.125 0 0 0 1 0 1 : 0.8125 0 0 0 1 0 0 : 0.5625 0 0 1 0 1 1 : 1.75 0 0 1 0 1 0 : 1.25 0 0 1 0 0 1 : 1.5 0 0 1 0 0 0 : 1 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5 0 0 0 0 1 1 : 0.875 0 0 0 0 1 0 : 0.625 0 0 0 1 1 1 : 0.9375 0 0 0 1 1 0 : 0.6875 0 0 0 1 0 1 : 0.8125 0 0 0 1 0 0 : 0.5625 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5 0 0 0 0 1 1 : 0.875 0 0 0 0 1 0 : 0.625 0 0 0 0 0 1 : 0.75 0 0 0 0 0 0 : 0.5
回答：
简单地从0迭代到2 6 -1并调用Matlab的dec2bin(...) (http://www.mathworks.com/help/techdoc/ref/dec2bin.html)函数。您可以使用sprintf(...) (http://www.mathworks.com/help/techdoc/ref/sprintf.html)将结果填充零。
更多&回答... (https://stackoverflow.com/questions/4839050)