Subplot for individual for loop angle
显示 更早的评论
I am trying to do subplot for each angle like the one below. But when I try to do it it only show the sine wave for all the angle on subplot(2,2,1).
Below is my code
for angle = [0.2 , deg2rad(7.5), deg2rad(30), deg2rad(45)]
for i=1
subplot(2,2,i)
%theta(0) = 0.2 rad
initial_x = [angle;0];
[t,x] = ode45(@fun, t, initial_x);
%figure
hold on
%graph for 0.2 rad of Part A (Non-Linear), plotted in red
plot(t,x(:,2))
%theta(0) = 0.2 rad
initial_y1 = [angle;0];
[t,y] = ode45(@fun1, t, initial_y1);
%graph for 0.2 rad of Part B (Linear), plotted in blue
plot(t,y(:,2))
grid on
title("Angular Velocity VS Time (" +angle+ " rad)")
xlabel('Time (s)')
ylabel('Angular Velocity (\omega)')
legend('Part A (Non-Linear)','Part B (Linear)')
hold off
end
end
2 个评论
Star Strider
2021-11-17
The plots appear to me to be correct.
What is the exact problem? (Also, if solving it requires ‘fun’ and ‘fun1’ they need to be posted.)
.
Jun Hong Wang
2021-11-18
My bad should have clarify that the above graph is the graph I want to make but with the current code I have I can only get the result below. I have also included who whole code
close all
clear
%Graph for velocity against time
%0.1 rad, 0.13 rad, 0.52 rad, 0.79 rad are plotted together
global g l
g = 9.81; %gravity
l = 9.81; %length
dt = 0.001; %time interval
t = 0:dt:10; %time from 0 to 10
for angle = [0.2 , deg2rad(7.5), deg2rad(30), deg2rad(45)]
for i=1
subplot(2,2,i)
%theta(0) = 0.2 rad
initial_x = [angle;0];
[t,x] = ode45(@fun, t, initial_x);
%figure
hold on
%graph for 0.2 rad of Part A (Non-Linear), plotted in red
plot(t,x(:,2))
%theta(0) = 0.2 rad
initial_y1 = [angle;0];
[t,y] = ode45(@fun1, t, initial_y1);
%graph for 0.2 rad of Part B (Linear), plotted in blue
plot(t,y(:,2))
grid on
title(sprintf('Angular Velocity VS Time (%.2f rad)', angle));
xlabel('Time (s)')
ylabel('Angular Velocity (\omega)')
legend('Part A (Non-Linear)','Part B (Linear)')
hold off
end
end
function dxdt = fun(~,x) %Non-linear function (Part A)
global g l
dx1dt = x(2);
dx2dt = -(g/l)*sin(x(1));
dxdt = [dx1dt;dx2dt];
end
function dydt = fun1(~,y) %Linear function (Part B)
global g l
dy1dt = y(2);
dy2dt = -(g/l)*(y(1));
dydt = [dy1dt;dy2dt];
end
采纳的回答
Drishan Poovaya
2021-11-24
Hi,
the reason the graph isn't being plotted the way you expect is because your nested for loop structure is incorrect for this case. You want 4 plots on different subplots. Refer to the code below. It is identical to your code but I've modified the for loops. Only one for loop is required for plotting, and a variable i is used to select the different subplots
close all
clear
%Graph for velocity against time
%0.1 rad, 0.13 rad, 0.52 rad, 0.79 rad are plotted together
global g l
g = 9.81; %gravity
l = 9.81; %length
dt = 0.001; %time interval
t = 0:dt:10; %time from 0 to 10
%start at subplot 2,2,1
i = 1;
for angle = [0.2 , deg2rad(7.5), deg2rad(30), deg2rad(45)]
subplot(2,2,i);
% increment i, so next plot is on next subplot and so on
i = i+1;
%theta(0) = 0.2 rad
initial_x = [angle;0];
[t,x] = ode45(@fun, t, initial_x);
%figure
hold on
%graph for 0.2 rad of Part A (Non-Linear), plotted in red
plot(t,x(:,2))
%theta(0) = 0.2 rad
initial_y1 = [angle;0];
[t,y] = ode45(@fun1, t, initial_y1);
%graph for 0.2 rad of Part B (Linear), plotted in blue
plot(t,y(:,2))
grid on
title(sprintf('Angular Velocity VS Time (%.2f rad)', angle));
xlabel('Time (s)')
ylabel('Angular Velocity (\omega)')
legend('Part A (Non-Linear)','Part B (Linear)')
hold off
end
function dxdt = fun(~,x) %Non-linear function (Part A)
global g l
dx1dt = x(2);
dx2dt = -(g/l)*sin(x(1));
dxdt = [dx1dt;dx2dt];
end
function dydt = fun1(~,y) %Linear function (Part B)
global g l
dy1dt = y(2);
dy2dt = -(g/l)*(y(1));
dydt = [dy1dt;dy2dt];
end
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Spline Postprocessing 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
