Quadratic Equation Calculator

Quadratic Equation Calculator

Description

Enter the coefficients for the Ax2 + Bx + C = 0 equation and Quadratic Equation will output the solutions and plot(if they are not imaginary).

• MATLAB release: MATLAB 7.7 (R2008b)
• Other Files: quadratic/quadratic.fig, ; quadratic/quadratic.m, ; quadratic/readme_leeme(esp).txt

[Husam Aldahiyat]

Enter [3 5 2] as values for [A B C] and you'll get messed up results. Same for [2 5 2].

[Matt Fig]

In the lines where you calculate the quadratic formula, you need a parenthesis around the 2*a, like this;
x1=(-b+sqrt(b^2-4*a*c))/(2*a)
x2=(-b-sqrt(b^2-4*a*c))/(2*a)
Otherwise your solutions are only valid for a = 1.

[Matt Fig]

I gave two stars because by running this program, the root is changed then not changed back. That is not a good way to make users of your code happy. When the user closes the GUI, you need to set colordef back to what it was prior to initialization. I will change my rating when this is fixed.

[Diego Orlando Barragan Guerrero]

Hi Husam and Matt Fig, thanks a lot for review my program "Quadratic Equation Calculator". I will change it.

Regards, Diego.

[Husam Aldahiyat]

While you do that why not add more features, like roots of a function regardless of its order or something else. You can use the MATLAB function roots which will help immensly.

Currently, even if you fix these mistakes, it's still very bare bones and needs more features.

[Guillermo Quintas]