MATLAB绘图

matlab绘制散点图

clc,clear

x=[11.9,11.5,14.5,15.2,15.9,16.3,14.6,12.9,15.8,14.1];

y=[196.84,196.84,197.14,197.03,197.05,197.13,197.04,196.96,196.95,196.98];

plot(x,y,'.')

Matlab将坐标系中的点连接起来

matlab绘制点线图

U
V
R=V./(U+V)
%图形展示出来
x=[1 2 3 4 5 6 7];
plot(x,U,'-.R*','LineWidth',2);
hold on;
plot(x,V,'-.G+','LineWidth',2);
hold on;
plot(x,R,'-.Mo','LineWidth',2);
%hold on;
%grid on;
xlabel('Number');
ylabel('Recognition rate (%)');

matlab：对单个矩阵plot绘图的说明

实例：a=magic(5)

a =

17    24     1     8    15
    23     5     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     2     9

plot(a)
grid on

x=rand(10,1,40); % 随机取40个数 一个当横坐标 一个当纵坐标
y=rand(10,1,40);
%画图
plot(x( 1:10),y( 1:10),'r.');hold on; % 点    r=红色
plot(x(11:20),y(11:20),'g*');hold on; % 星星  g=绿色
plot(x(21:30),y(21:30),'o');hold on;  % 圆圈  默认是蓝色
plot(x(31:40),y(31:40),'mo','MarkerSize',15) % 大大的圆圈  m=紫色

分别按行组和行列绘制三维条形图

Y = round(rand(5,3)*10);            %随机函数产生5*3的数组，对产生的数据取整

subplot(2,2,1)

bar(Y,'group')

title 'Group'

subplot(2,2,2)

bar(Y,'stack')                     %堆型二维垂直条形图

title 'Stack'

subplot(2,2,3)

barh(Y,'stack')                    %堆型二维水平条形图

title 'Stack'

subplot(2,2,4)

bar(Y,1.5)                       %设定条形的宽度为1.5

title 'Width = 1.5'

效果如图

Y = [1 2 3 4 5 6 7;

1 2 3 4 3 2 1;

76 5 4 3 2 1];

subplot(3,2,1)

bar3(Y,'detached')

title('Detached')

subplot(3,2,2)

bar3(Y,0.25,'detached')

title('Width = 0.25')

subplot(3,2,3)

bar3(Y,'grouped')

title('Grouped')

subplot(3,2,4)

bar3(Y,0.5,'grouped')

title('Width = 0.5')

subplot(3,2,5)

bar3(Y,'stacked')

title('Stacked')

subplot(3,2,6)

bar3h(Y,0.3,'stacked')

title('Width = 0.3')

效果如图

Matlab将坐标系中的点连接起来

1. clc; clear all; close all;
2. y=[60,58,55,53,53,53,51,50,49,46,41,41,41,40,39,40,40,40];
3. x=[229,230,231,232,232,233,234,235,235,237,239,239,239,240,241,241,240,240];
4. figure; hold on; box on;
5. [x1, ind] = sort(x);
6. y1 = y(ind);
7. [b1, m1, n1] = unique(x1, 'first');
8. xt = linspace(min(x), max(x));
9. yt = interp1(x1(m1), y1(m1), xt, 'spline');
10. plot(xt, yt, 'r-');
11. plot(x, y, 'k*')