cannot enter = symbol

Question

Alex 2024-4-8

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2104381-cannot-enter-symbol

评论： Cris LaPierre 2024-4-8

I'm getting invalid use of operator warnings when defining variables

clc
clear all
rho = 1025 %kg/m^3 - Seawater Density
c_d = 0.7 %  Drag Coefficient (gentils, wang et al, 2017)
c_m = 2.0 % Inetia Coefficient 
% Note: current is neligible 
% Calulate wave length (Lamda)
g = 9.81; % gravity
T = 12 % secs - 8.3.1 corewind 1.2 Isle of Barra
H = 8 % m - 8.3.1 corewind 1.2 Isle of Barra
d = 120 % m - depth of column Table 3-1 OC3 Floating Paltform
lambda = ((g*T^2/2pi)tan*(H))(2pi*d/lambda)
Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

----------------------------------------------------------------------------------------

>> MorrisonsEqn

File: MorrisonsEqn.m Line: 4 Column: 1

Invalid use of operator.

>> MorrisonsEqn

File: MorrisonsEqn.m Line: 4 Column: 1

Invalid use of operator.

>> MorrisonsEqn

File: MorrisonsEqn.m Line: 17 Column: 19

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct

matrices, use brackets instead of parentheses.

>> MorrisonsEqn

File: MorrisonsEqn.m Line: 15 Column: 19

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To

construct matrices, use brackets instead of parentheses.

>> MorrisonsEqn

File: MorrisonsEqn.m Line: 15 Column: 19

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To

construct matrices, use brackets instead of parentheses.

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Answer 1

Cris LaPierre 2024-4-8

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2104381-cannot-enter-symbol#answer_1438301

在 MATLAB Online 中打开

There is no implied multiplication. Also, the syntax for using tan is incorrect.

lambda = ((g*T^2/(2*pi))*tan(H))*(2*pi*d/lambda)

% ^^^^^^ ^ x ^ ^

clc
clear all
rho = 1025 %kg/m^3 - Seawater Density
rho = 1025
c_d = 0.7 %  Drag Coefficient (gentils, wang et al, 2017)
c_d = 0.7000
c_m = 2.0 % Inetia Coefficient 
c_m = 2
% Note: current is neligible 
% Calulate wave length (Lamda)
g = 9.81; % gravity
T = 12 % secs - 8.3.1 corewind 1.2 Isle of Barra
T = 12
H = 8 % m - 8.3.1 corewind 1.2 Isle of Barra
H = 8
d = 120 % m - depth of column Table 3-1 OC3 Floating Paltform
d = 120
lambda = ((g*T^2/2/pi)*tan(H))*(2*pi*d/lambda)
Unrecognized function or variable 'lambda'.