How can I fix this error?
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I had a code like this:
clear all, close all
f = @(x)(4/(1+x^2));
a = 0;
b = 1;
F = @(x)(-8x/((1+x^2)^2)); % antiderivative of f
ref = F(b) - F(a);
n = 2;
x = linspace(a,b,n+1);
h = (b-a)/n;
then in the command part, it shows:
File: assignment3_question2b.m Line: 7 Column: 12
Invalid expression. Check for missing multiplication operator, missing or unbalanced
delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.
How can i fix this?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1218962/image.png)
0 Kommentare
Antworten (1)
David Hill
am 5 Dez. 2022
f = @(x)4./(1+x.^2)
a = 0;
b = 1;
F = @(x)-8*x./(1+x.^2).^2 % antiderivative of f
ref = F(b) - F(a);
n = 2;
x = linspace(a,b,n+1);
h = (b-a)/n;
2 Kommentare
Torsten
am 5 Dez. 2022
F = @(x)-8*x.*(1+x.^2).^2; % antiderivative of f
instead of
F = @(x)-8*x.(1+x.^2).^2; % antiderivative of f
But the antiderivative of f is of course
F = @(x) 4*atan(x)
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