input equation from user
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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)
il 25 Apr 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.
Più risposte (2)
Manjeet Singh
il 5 Apr 2016
Modificato: Stephen23
il 24 Giu 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
il 24 Giu 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
il 9 Ago 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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