cannot enter = symbol

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.

Answer 1

[Cris LaPierre]

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'.

The new error is because you cannot use a variable that has not yet been defined.

[Alex]

Thanks but why is it highlighting the equals signs yellow on every line, and an error on line 4.

Much appreciated

[Cris LaPierre]

That is a warning letting you know those lines will print to the screen. To get rid of the yellow highlight, add a semicolon at the end of the line.

x=2

x = 2

% vs
y=3;