%%
%以学生为例的数据结构
student.name = 'John Doe'; 
student.id = 'jdo2@sfu.ca';
student.number = 301073268; 
student.grade = [100, 75, 73; ...
95, 91, 85.5; ...
100, 98, 72];
student

%%
%向结构体中添加信息
student(2).name = 'Ann Lane'; 
student(2).id = 'aln4@sfu.ca';
student(2).number = 301078853;
student(2).grade = [95 100 90; 95 82 97; 100 85 100];

%%
%一些结构体方法的使用
fieldnames(student)
rmfield(student,'id')

%%
%二阶单元格阵列
A(1,1)={[1 4 3; 0 5 8; 7 2 9]};
A(1,2)={'Anne Smith'};
A(2,1)={3+7i};
A(2,2)={-pi:pi:pi};
A

%%
%三阶单元格阵列
A{1,1,1} = [1 2;4 5]; 
A{1,2,1} = 'Name'; 
A{2,1,1} = 2-4i; 
A{2,1,1} = 7; 
A{1,1,2} = 'Name2'; 
A{1,2,2} = 3; 
A{2,1,2} = 0:1:3; 
A{2,2,2} = [4 5]';

%%
%返回具有指定行和列的新数组
A = {'James Bond', [1 2;3 4;5 6]; pi, magic(5)}
C = reshape(A,1,4)

%%
%将正弦值写入文件sinx.txt
x = 0:pi/10:pi; y = sin(x); fid = fopen('sinx.txt','w');
for i=1:11
fprintf(fid,'%5.3f %8.4f\n', x(i), y(i));
end
fclose(fid); type sinx.txt