how can i do Trapezoidal rule? - error
显示 更早的评论
clc
clear
format long
d = [0.05 0.025 0.0125 0.00625 0.003125];
syms x y
f= 10000.*exp(y)/(1+abs(x)./2) ;
I_t_x = int(f,x,-5,0);
I_t = double(int(I_t_x,y,-2,2))
for i = 1:length(d)
x = -5 : d(i) : 0 ;
y = -2 : d(i) : 2 ;
[X,Y] = meshgrid(x,y);
F = 10000*exp(y)/(1+abs(x)/2) ;
I = trapz(y,trapz(x,F,2))
end
2 个评论
Jan
2021-5-25
Please post code as text, because then it can be reused easily to write an answer.
Whenever you mention an error in the forum, post a complete copy of the message. Then the readers can concentrate on solving the problem, instead on investing time in guessing, what the error is. You do have this important information on the screen already, so sharing it is the way to go.
jeaho jang
2021-5-25
采纳的回答
Jan
2021-5-25
Which error message do you get?
This should fail, if x and y are symbolic variables:
[X,Y] = meshgrid(x,y);
And you do not use the output X and Y at all:
F = 10000*exp(y)/(1+abs(x)/2) ;
I = trapz(y,trapz(x,F,2))
5 个评论
jeaho jang
2021-5-25
编辑：jeaho jang
2021-5-25
I want to solve this function with trapezoid rule.
-5 <= x <= 0
-2 <=y <= 2
how can i do?
del x and del y = 0.05 0.025 0.0125 0.00625 0.003125
jeaho jang
2021-5-25
Torsten
2021-5-25
In the definition of F, I wrote ./, not only /
jeaho jang
2021-5-25
编辑：jeaho jang
2021-5-25
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