Matlab入门基础_二

%%  计算方程组的解
a=[2,4;3,-5;1,2;2,1];
b=[11;3;6;7];
solution=a\b
s = pinv(a) * b
%% 
a = [1,1,0;1,0,1;1,1,1;1,2,-1]
b = [1;2;0;-1]
s = pinv(a) * b

%%  当前目录下打开文件
file = dir('*.bmp');
tind = 1;
a  = imread(file(1).name);
a = double(a);

%%  读取txt
clear,clc;
%a = load('data1.txt')               % 只能加载整行整列的数据
b = textread('data1.txt')
c = readmatrix('data1.txt')
d = importdata('data1.txt')         % 万能

%% 导入带有题头的数据
clear,clc;
a = importdata('data2.txt')
a.data
a.textdata

%%  保存数据
clear,clc;
a = rand(3);
b = rand(2,3);
% 将 a,b保存到my data1
save mydata1 a b
% 加载数据
load('mydata1.mat')
whos