writting down the code for the function

1 次查看（过去 30 天）

显示更早的评论

Bijaya 2024-2-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2079686-writting-down-the-code-for-the-function

评论： Walter Roberson 2024-2-8

matlab code.pdf

在 MATLAB Online 中打开

Attached file has the function and here is my matlab code pasted below

function y = myFunction(x, n)
if n == 1
    y = 4 * sin(x) / (25*x + sin(25));
else
    y = 2 * tan(5*n) / bi;
end
end
% Define the values of x and n
n = 2;
% Call the function to calculate y
y = myFunction(x, n);
% Display the result
disp(y);

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson 2024-2-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2079686-writting-down-the-code-for-the-function#answer_1404731

在 MATLAB Online 中打开

y = 4 * sin(x) / (25*x + sin(25));

That is not vectorized. It needs to be

y = 4 * sin(x) ./ (25*x + sin(25));

Also remember that the parameters to the trig functions are in radians . If you want degrees, use sind

9 个评论
显示 7更早的评论隐藏 7更早的评论

Walter Roberson 2024-2-8

在 MATLAB Online 中打开

n is also not defined

Remember that sin(25) is sine of 25 radians.

It is confusing that you syms Bi and then define Bi in terms of Bi

You subs(F, x, x_value) but F is not defined in terms of x.

% Define the functions

syms x Fo C_n Bi; % Declare symbolic variables

syms n

syms zeta_n [1 3]

F = sum(C_n .* exp(-zeta_n.^2 * Fo) .* cos(zeta_n)); % Function F(x)

Cn = 4 * sind(5 * C_n * n) + (25 * n + sind(25)); % Function Cn(n)

Bi = 5 * tand(5) + Bi; % Function Bi

% Define the values for constants

C_n = 1; % Constant C

Fo = 2; % Constant Fo

Bi = 3; % Constant Bi

% Define values for variables

x_value = 0:0.1:10; % Values of x from 0 to 10

n_value = 1:10; % Values of n from 1 to 10

% Calculate F(x) for given x values

F_values = subs(F, x, x_value);

% Calculate Cn(n) for given n values

Cn_values = subs(Cn, n, n_value);

% Calculate Bi

Bi_value = subs(Bi);

% Display results

disp('Values of F(x):');

Values of F(x):

disp(F_values);

disp('Values of Cn(n):');

Values of Cn(n):

disp(Cn_values);

disp(['Value of Bi:', num2str(Bi_value)]);

Error using num2str
Input to num2str must be numeric.

Bijaya 2024-2-8

The above modified one leads to following errors

Error using num2str

Input to num2str must be numeric.

Error in untitled523 (line 26)

disp(['Value of Bi:', num2str(Bi_value)]);

Walter Roberson 2024-2-8

Bi_value is symbolic, not numeric. You cannot num2str() it. You can char() it.

请先登录，再进行评论。

请先登录，再回答此问题。

类别

MATLAB Mathematics Elementary Math

在 Help Center 和 File Exchange 中查找有关 Elementary Math 的更多信息

Community Treasure Hunt

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

Start Hunting!

Translated by

writting down the code for the function

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

9 个评论
显示 7更早的评论隐藏 7更早的评论

另请参阅

类别

标签

Community Treasure Hunt

writting down the code for the function

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

回答（1 个）

9 个评论 显示 7更早的评论隐藏 7更早的评论

另请参阅

类别

标签

Community Treasure Hunt

WeChat

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

9 个评论
显示 7更早的评论隐藏 7更早的评论