Help in creating function , built in equation

Hi All,

I am trying to build in function, including equation which is a result of another code,

I understand function is a separate script but I just need to do something smart, no to add the equation in every time ,

below is the code:

clear all;
clc;
syms x y;
an=solve(-15== 10*x+2*y,y);
ap=solve(10*x+2*y ==20,y);
yin=[an,ap]
damontwo % Name of the function 

%% function 
function damontwo(x)
x=input('please enter number ')
yin(:,1)=input('Enter equation to solve ')
end 

When I type an: I got an error ?, however, when I type equation, it works, so could anyone please help me, how could I introduce that to the function ?

Thanks,

Answer 1

[Walter Roberson]

syms x y;
eqns = damontwo(x,y);

solve(eqns)

%% function 
function yin = damontwo(x,y)
  yin(1) = input('Enter first equation to solve ');
  yin(2) = input('Enter second equation to solve ');
end 

[Ali Tawfik]

Hi Walter,

Thanks again for your concern.

Unfortunely I got the following answer:

ans =

Empty sym: 0-by-1

Can not get any number by trying your suggestions,

Again, I need the equation in the function be smart, I mean to type it but not as equation, I need to type it, as a variable (which is an answer of equation earlier in the command)

Looking to hearing from you

Thanks,

[Ali Tawfik]

Hey Walter,

Any feedback, please

Thanks,

[Walter Roberson]

I do not understand what you need. What does it mean to type it as a variable but not as an equation? Have have something as a result of a previous equation? Okay, what form is that in? Is a symbolic expression? Is it a character vector?

[Ali Tawfik]

Thanks Walter, I mean yin(:,1)=an

(an) is a result of a previous equation

clear all;
clc;
syms x y;
an=solve(-15== 10*x+2*y,y);
ap=solve(10*x+2*y ==20,y);
yin=[an,ap]
damontwo % Name of the function 
%% function 
function damontwo(x)
x=input('please enter number ')
yin(:,1)=input('Enter equation to solve ')
end 

[Walter Roberson]

Why are you bothering to prompt at all? Why not use an if you have it already?