Matlab遍历文件及直方图统计

参考链接：
使用MATLAB遍历文件
strtrim用法
strsplit用法
cell单元数据使用{}

close all;
dir_path = 'C:/Users/';	
fileFolder = ls(dir_path);
fileNum = length(fileFolder(:,1)) - 2;
for i = 3:(3+fileNum-1)
	file_path = strcat(dir_path, strtrim(fileFolder(i,:)));
	fid = fopen(file_path, 'rb');
	s = strsplit(strtrim(fileFolder(i,:)),'_');
	c1 = str2_double(s{length(s)-2});
	c2 = str2_double(s{length(s)-3});
	data_length = c1 * c2;
	A = fread(fid, data_length);
	[N, X] = hist(A, 256);
	x = 1:1:256;
	f = figure;
	plot(x, N);
	title(strtrim(fileFolder(i,:)));
	grid on;
	save_path = strcat(dir_path, strtrim(fileFolder(i,:)),'.fig');
	savefig(save_path);
	fclose(fid);
	hold on;
end
close all;