Subplot in a for loop with different graphs

2020 7 9
2 个回答
更新时间：2020 7 9
4 次查看（30 天）

0 个投票

Hello, I would like to have my program plot my outputs in 2 different figures. Two [1,5] subplots, but my graph is changing within every iteration. Please help...
clear all;
close all;
clc;
%% Input
a = 0;
b = 3;
yt = @(t) 5.*exp(-t).*(-1 + sin(10.*t));
dydt = @(t,y) -y + 50*cos(10*t)*exp(-t);
y0 = -5;
%% Midpoint toepassen
for n = [8 16 32 64 128]
[t,y] = midpoint(dydt,a,b,y0,n);
ytwaarde = yt(t);
figure();
plot(t,y)
hold on
fplot(yt, [a b])
title(strcat('Grafiek bij N =',int2str(n)));
legend('Benadering van yt' ,'yt','Location', 'northeastoutside');
figure
plot(t,abs(ytwaarde - y))
title(strcat('De fout bij N = ', int2str(n)));
set(gca, 'YScale', 'log')
end
%% Functies
function [t,w] = midpoint(f,a,b,y0,n)
h = (b-a)/n;
t = a:h:b;
w = ones(size(t));
w(1) = y0;
for n = 2:length(t)
w(n) = w(n-1) + h*f(t(n-1) + h/2, w(n-1) + (h/2)*f(t(n-1),w(n-1)));
end
end

请先登录，再回答此问题。

回答（2 个）

KSSV
KSSV 2020-7-9

0 个投票

for i = 1:5
figure(1)
subplot(5,1,i)
plot(rand(1,10))
figure(2)
subplot(5,1,i)
plot(rand(1,10))
endfor
Alan Stevens
Alan Stevens 2020-7-9

0 个投票

Something like this perhaps (though the labelling could be tidied up!):
a = 0;
b = 3;
yt = @(t) 5.*exp(-t).*(-1 + sin(10.*t));
dydt = @(t,y) -y + 50*cos(10*t)*exp(-t);
y0 = -5;
%% Midpoint toepassen
N = [8 16 32 64 128];
for i = 1:5
n = N(i);
[t,y] = midpoint(dydt,a,b,y0,n);
ytwaarde = yt(t);
figure(1);
subplot(5,1,i)
plot(t,y)
hold on
fplot(yt, [a b])
text(2,min(y)/2,strcat('Grafiek bij N =',int2str(n)));
% legend('Benadering van yt' ,'yt','Location', 'northeastoutside');
figure(2)
subplot(5,1,i)
plot(t,abs(ytwaarde - y))
text(0.1, mean(abs(ytwaarde - y))/4,strcat('De fout bij N = ', int2str(n)));
set(gca, 'YScale', 'log')
end
%% Functies
function [t,w] = midpoint(f,a,b,y0,n)
h = (b-a)/n;
t = a:h:b;
w = ones(size(t));
w(1) = y0;
for n = 2:length(t)
w(n) = w(n-1) + h*f(t(n-1) + h/2, w(n-1) + (h/2)*f(t(n-1),w(n-1)));
end
end

类别

在 帮助中心 和 File Exchange 中查找有关 Number games 的更多信息

产品

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by