(ASAP)why symsum can not calculation?????

Question

순일 2023-9-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2023607-asap-why-symsum-can-not-calculation

评论： Star Strider 2023-9-20

t = (-2:0.5:2);
a=1;
x1=1/2 + symsum((1/2)*(sinc(a/2))*cos(2*pi*a*t)/4,a,1,inf);
plot(t,x1)

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Star Strider 2023-9-20

在 MATLAB Online 中打开

It cannot be calcualted because you are not using symbolic calculations.

Perhaps this —

syms a t

% t = sym(-2:0.5:2);

% a=1;

x1(t) = 1/2 + symsum((1/2)*(sinc(a/2))*cos(2*pi*a*t/4),a,1,inf);

x1 = simplify(x1, 500)

x1(t) =

Check = vpa(x1(-2:0.5:2))

Check =

figure

fplot(x1, [-2 2])

grid

axis([-3 3 0 1])

Warning: Error updating FunctionLine.

The following error was reported evaluating the function in FunctionLine update: Unable to convert expression containing remaining symbolic function calls into double array. Argument must be expression that evaluates to number.

I corrected the ‘x1(t)’ expression to match the image.

.

请先登录，再进行评论。

请先登录，再回答此问题。