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'입력 인수가 부족합니다' 이 오류를 해결하고 싶어요.

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gyul
gyul on 10 Apr 2024
Commented: gyul on 10 Apr 2024
syms ('x')
xo=2000;
tolerance=0.03;
Re=1.0;
fid=fopen('solution1.txt', 'w');
while Re>tolerance
assignment2v=assignment2_2f(xo);
assignment22v=assignment2_2ff(xo);
xn=xo-assignment2v/assignment22v;
Re=abs((xn-xo)/xo);
fprintf(fid, 'approx. solution is : x=5.2%f\n', xn);
xo=xn; fo=fn; ffo=ffn;
end
fprintf(fid, 'The coverged solution is : x=5.2%f\n', xo);
type solution1.txt
----------------------------
function y=assignment2_2f(x)
y=x/400+10.245*sin(4.4934*x/4000)-2;
end
---------
function g=assignment2_2ff(x)
g=diff(assignment2_2f,x);
end
-----------------------------
assignment2_2
입력 인수가 부족합니다.
오류 발생: assignment2_2f (2번 라인)
y=x/400+10.245*sin(4.4934*x/4000)-2;
오류 발생: assignment2_2 (6번 라인)
fo=int(assignment2_2f,xo); ffo=int(assignment2_2ff,xo);
  3 Comments
gyul
gyul on 10 Apr 2024
I wanted to define the substitution of 'xo' for function that 'assinment2_2f'. Now that I look at it, I don't think it's necessary. However, deleting it does not change the error.
Is the 'Re>tolerance' part correct that the one limitation you mentioned?
Dyuman Joshi
Dyuman Joshi on 10 Apr 2024
If you want to define substitution use subs instead of int.

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Accepted Answer

Dyuman Joshi
Dyuman Joshi on 10 Apr 2024
I have made some changes to your code, please check the code below and refer to the comments for information -
syms('x')
%% Define the functions as symbolic functions
assignment2_2f(x) = x/400+10.245*sin(4.4934*x/4000)-2;
assignment2_2ff(x) = diff(assignment2_2f, x);
xo=2000;
%% Calculate the values with xo as inputs
%Note that you can use this syntax with symbolic functions as well
fo = assignment2_2f(xo);
ffo = assignment2_2ff(xo);
tolerance=0.03;
Re=1.0;
fid=fopen('solution1.txt', 'w');
while Re>tolerance
assignment2v=assignment2_2f(xo);
assignment22v=assignment2_2ff(xo);
xn=xo-assignment2v/assignment22v;
Re=abs((xn-xo)/xo);
%% I assume that fn and ffn are calculated based on xn
fn = assignment2_2f(xn);
ffn = assignment2_2ff(xn);
fprintf(fid, 'approx. solution is : x=5.2%f\n', xn);
xo=xn; fo=fn; ffo=ffn;
end
fprintf(fid, 'The coverged solution is : x=5.2%f\n', xo);
%% Also, you should close the file after data writing has been completed.
fclose(fid);
type solution1.txt
approx. solution is : x=5.24338.898407 approx. solution is : x=5.24629.292712 approx. solution is : x=5.24562.954523 The coverged solution is : x=5.24562.954523
  1 Comment
gyul
gyul on 10 Apr 2024
ohh,,,thank you for saving me,,

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