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Quadratic Equation Calculator

1.5

1.5 | 2 ratings Rate this file 34 Downloads (last 30 days) File Size: 9.42 KB File ID: #22935
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Quadratic Equation Calculator

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09 Feb 2009 (Updated )

Quadratic Equation Calculator

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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)
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Comments and Ratings (6)
11 Feb 2009 Guillermo Quintas  
10 Feb 2009 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.

10 Feb 2009 Diego Barragán

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

Regards, Diego.

10 Feb 2009 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.

10 Feb 2009 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.

09 Feb 2009 Husam Aldahiyat

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

Updates
10 Feb 2009

update

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