归一化和反归一化matlab程序

% un - normalized % this code is corresponding to 'myscale.m' that is a normalized code. % Edit by suozi 2017.03.06 HIT.JBM % QQ:379786867 buaasuozi@126.com function un_normaldata = un_normal(origdata, scaledata, columnarray, lower, upper) % input: origdata: the original data % scaledata: the scaled data normalized by 'myscale.m' or other normalized function % columnarray: the columns that are going to be unnormalized in the column set of original data % length(columnarray) = size(scaledata,2) % lower: the low threshold value of the scale data % upper: the upper threshold value of the scale data % output: un_normaldata: the unnormal data based on origdata and scaledata % NOTE: the scaledata are normalized with respect to column. if nargin < 3 fprintf('Please input the parameters according the demands of this function.') return end if length(columnarray) ~= size(scaledata,2) fprintf('The slacedata and columnarray are not accordant.') return end % [m,n] = size(origdata); % [p.q] = size(scaledata); % find out the max and min value of each column maxmin = zeros(2,length(columnarray)); for i = 1:length(columnarray) index = columnarray(i); maxmin(1,i) = max(origdata(:,index)); maxmin(2,i) = min(origdata(:,index)); end % unnormalized un_normaldata = zeros(size(scaledata)); for j = 1:size(scaledata,1) un_normaldata(j,:) = (scaledata(j,:) - lower).* (maxmin(1,:) - maxmin(2,:))./ (upper - lower) + maxmin(2,:); end end