input equation from user
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Saumya
le 25 Avr 2014
Réponse apportée : Mohammed Alrajeb
le 9 Août 2019
Hi, I am a new user for MATLAB and I have R2010a version. I want to write a program where user should be able to enter euqation as input. e.g. : 5x^2 + 2x =8. And once the equation is fed in, I want to find out value of the equation for a perticular x value.
Please help.
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Jos (10584)
le 25 Avr 2014
str = input('Give an equation in x: ','s') ;
% the user types in, for instance 2*x^2-3*x+4
x = input('Type in a value of x: ') ;
% the user types in, for instance, 2
f = inline(str,'x') ;
y = feval(f,x) ;
disp(['"' str '", for x = ' num2str(x) ', equals ' num2str(y)]) ;
This will error when the string cannot be converted to an inline function or when the function cannot be evaluated for the value entered by the user.
Plus de réponses (2)
Manjeet Singh
le 5 Avr 2016
Modifié(e) : Stephen23
le 24 Juin 2016
str = input('Give an equation in x and y: ','s'); % the user types equation in form of x and y
f = inline(str,'x','y') % This gives function in form of f(x,y) $ both value of x and y can be put like f(2,3)
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Sourin Dey
le 24 Juin 2016
Can you kindly show me the way to read the coefficients from the input equation? (The equation will be taken using input function)
Mohammed Alrajeb
le 9 Août 2019
hi every one
i need to your help
i need to enter 4 input (decimal number) and convert to binary number 32bit how can do that?
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