前言
MATLAB是一个功能强大的软件,我们可以利用MATLAB进行绘图、算法验证、仿真实验等等。在学习MATLAB的过程中,繁多的命令与代码往往容易使我们脑容量过载
本系列将总结一些常见的MATLAB编程小技巧
可能有些地方会有些错误或者是不太完善的,还请大家在评论区直接指出❤️❤️❤️
系列文章
【MATLAB100个实用小技巧】——图形应用(1-10)
【MATLAB100个实用小技巧】——图形应用(11-20)
重点 stem
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
x = 0 :pi/20:2*pi;
y1 = sin(x);
y2 = cos(x);
h1 = stem(x,y1+y2);
hold on;
h2 = plot(x,y1,'^r',x,y2,"*g");
hold off;
h3 = [h1(1);h2];
legend(h3,'y1+y2',"y1 = sin(x)","y2 = cos(x)");
xlabel('x','fontsize',16);
ylabel('y','fontsize',16);
title('正弦函数与余弦函数的线性组合','fontsize',16);
grid on;
重点compass
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
winddirection = [54 24 65 84
256 12 235 62
125 324 34 254];
windpower = [2 5 5 3
6 8 12 7
6 14 10 8];
rdirection = winddirection*pi/180;
[x,y]=pol2cart(rdirection,windpower);
compass(x,y);
desc = {'风向和风力',
'北京气象台',
'10月1日0:00到',
'10月1日0:00'};
gtext(desc);
重点 meshgrid
pol2cart
polar
←此处有链接
代码
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
[th,r]=meshgrid((0:10:360)*pi/180,0:0.05:1);
[x,y]=pol2cart(th,r);
z=x+i*y;
f=(z.^4-1).^(0.25);
contour(x,y,abs(f),20) ;
axis equal;
xlabel('实部','fontsize',16);
ylabel('虚部','fontsize',16);
h=polar([0 2*pi],[0 1]);
delete(h)
hold on;
contour(x,y,abs(f),20);
重点 ginput
←此处有链接
代码
function Curve_sin_and_cos
axis([0 10 0 10]);
hold on;
x=[];
y=[];
n=0;
disp('单击鼠标左键点取需要的点');
disp('单击鼠标右键点取最后一个点');
but=1;
while but==1
[xi,yi,but]=ginput(1);
plot(xi,yi,'bo');
n=n+1;
disp('单击鼠标左键点取下一个点');
x(n,1)=xi;
y(n,1)=yi;
end
t=1:n;
ts=1:0.1:n;
xs=spline(t,x,ts);
ys=spline(t,y,ts);
plot(xs,ys,'r-');
hold off
重点 moviein
movie
uicontrol
uicontrol
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
axis equal;
m=moviein(20,gcf);
set(gca,'nextplot','replacechildren');
h=uicontrol('style','slider','position',...
[100 10 500 20],'min',1,'max',20);
for j=1:20
plot(fft(eye(j+16))) ;
set(h,'value',j)
m(:,j)=getframe(gcf);
end
clf;
axes('position',[0 0 1 1]);
movie(m,30)
重点
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
axis equal ;
m=moviein(20,gcf);
set(gca,'nextplot','replacechildren');
h=uicontrol('style','slider','position',...
[100 10 500 20],'min',1,'max',20);
for j=1:20
plot(fft(eye(j+16)));
set(h,'value',j)
m(:,j)=getframe(gcf);
end
clf;
axes('position',[0 0 1 1]);
movie(m,30)
重点 fill
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
t=(1:2:15)*pi/8;
x=sin(t);
y=cos(t);
fill(x,y,'r')
axis square off ;
text(0,0,'STOP','color',[1 1 1],'fontsize',50,'horizontalalignment','center');
重点bar
bar3
stairs
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
subplot(2,2,1);
x=-3:0.2:3;
y=exp(-x.*x);
bar(x,y);
title('2-D Bar Chart');
subplot(2,2,2);
x=-3:0.2:3;
y=exp(-x.*x);
bar3(x,y,'r');
title('3-D Bar Chart');
subplot(2,2,3) ;
x=-3:0.2:3;
y=exp(-x.*x);
stairs(x,y);
title('Stair Chart')
subplot(2,2,4);
x=-3:0.2:3;
y=exp(-x.*x);
barh(x,y);
title('Horizontal Bar Chart')
重点 plot3
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
subplot(2,1,1);
x=linspace(0,2*pi);
y1=sin(x);
y2=cos(x);
y3=sin(x)+cos(x);
z1=zeros(size(x));
z2=0.5*z1;
z3=z1;
plot3(x,y1,z1,x,y2,z2,x,y3,z3);
grid on;
xlabel('X 轴');
ylabel('Y 轴');
zlabel('Z 轴 ');
title('Figure1:3-D Plot');
subplot(2,1,2);
x=linspace(0,2*pi);
y1=sin(x);
y2=cos(x);
y3=sin(x)+cos(x);
z1=zeros(size(x));
z2=0.5*z1;
z3=z1;
plot3(x,z1,y1,x,z2,y2,x,z3,y3);
grid on;
xlabel('X 轴');
ylabel('Y 轴');
zlabel('Z 轴 ');
title('Figure2:3-D Plot');
重点sphere
hidden
←此处有链接
代码
function Curve_sin_and_cos
h0 = figure('ToolBar','none','Position',[150 250 500 400],'name','Curve of sinandcos()');
subplot(1,2,1);
[x,y,z]=sphere(10);
mesh(x,y,z)
axis off;
title('Figure1:Opaque');
hidden on;
subplot(1,2,2);
[x,y,z]=sphere(10);
mesh(x,y,z)
axis off ;
title('Figure2:Transparent');
hidden off;