how to plot sine and cosine waves in one graph ?

565 次查看（过去 30 天）

显示更早的评论

Osama Abbas 2012-9-28

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49334-how-to-plot-sine-and-cosine-waves-in-one-graph

评论： Walter Roberson 2022-4-7

采纳的回答： Wayne King

used for academic use

5 个评论
显示 3更早的评论隐藏 3更早的评论

Krishan Guiya 2022-4-6

How can I plot cos(ax+b)

Walter Roberson 2022-4-7

在 MATLAB Online 中打开

@Krishan Guiya

syms x b

a = randn()

a = -1.0804

f = cos(a*x + b);

fsurf(f, [-10 10 -2*pi 2*pi])

xlabel('x'); ylabel('b')

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Wayne King 2012-9-28

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49334-how-to-plot-sine-and-cosine-waves-in-one-graph#answer_60270

在 MATLAB Online 中打开

It sounds like the OP wants this in one graph (not subplotted)

     t = 0:0.01:(2*pi);
     x = cos(t);
     y = sin(t);
     plot(t,x,'k'); hold on;
     plot(t,y,'r-.'); 
     axis([0 2*pi -1.5 1.5])
     legend('cos(t)','sin(t)','Location','NorthEast')

2 个评论
显示无隐藏无

AJAY VISHNU 2020-2-28

thanks

roger xiang 2020-9-11

thanks

请先登录，再进行评论。

更多回答（4 个）

Ravi Kumar 2020-1-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49334-how-to-plot-sine-and-cosine-waves-in-one-graph#answer_411766

在 MATLAB Online 中打开

x=0:0.1:2*pi;
plot(x,sin(x))
hold on
plot(x,cos(x))

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

Sabarinathan Vadivelu 2012-9-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49334-how-to-plot-sine-and-cosine-waves-in-one-graph#answer_60265

在 MATLAB Online 中打开

a = 10;
t = 0 : 0.01 : 10;
A = a*sin(t);
subplot(121),plot(t,A);
B = a*cos(t);
subplot(122),plot(t,B);

3 个评论
显示 1更早的评论隐藏 1更早的评论

Stephen23 2017-3-2

编辑：Stephen23 2017-3-2

在 MATLAB Online 中打开

@Lee Johnson: syntax not supported by MATLAB. Looks like MatPlotLib to me.

The MATLAB subplot documentation gives this syntax:

subplot(m,n,p)

and explains what m, n, and p are. There is of course no point in simply copying this info here when you can read in the documentation (see link).

Walter Roberson 2021-2-1

subplot 121 is archaic, no longer documented, but still works. It is interpreted as subplot(1, 2, 1)

请先登录，再进行评论。

Abdullah Rajput 2020-8-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/49334-how-to-plot-sine-and-cosine-waves-in-one-graph#answer_482228

在 MATLAB Online 中打开

close all; clear all; clc;
t=[0:0.5:180]
x=sind(t);
plot(t,x),hold on
y=cosd(t);
plot(t,y)
legend('Sine wave','Cos wave')

I would not normally have mentioned a backwards compatibility like that now that we are 4 years on, but I suspect this question is getting read by people who are using old versions of MATLAB. (We are getting a rush of people using MATLAB from 2013 and 2015.)

Konstantin Kuzminov 2021-3-13

You are absolutely right. This is very useful information, because not everyone has the latest versions, they are not required for simple tasks. Correct syntax - 50% success.

请先登录，再进行评论。

请先登录，再回答此问题。