MATLAB: How to simplify

doublesimplifysym

I get the following expression for a variable 'a' :

2-7/6+1/6*97^(1/2)+1/6*(-646-86*97^(1/2))^(1/2) -7/6+1/6*97^(1/2)-1/6*(-646-86*97^(1/2))^(1/2) -7/6-1/6*97^(1/2)+1/6*(-646+86*97^(1/2))^(1/2) -7/6-1/6*97^(1/2)-1/6*(-646+86*97^(1/2))^(1/2)

What is the command to simplify it to get a single value in the command window ?

Best Answer

If a is sym:

double(a)

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MATLAB: Matlab simplify boolean expression

You have copied a MuPAD command. Did you use it inside a MuPAD Notebook? If not, type this at the MATLAB command prompt:

 mupad

This will open a MuPAD Notebook. There, paste the input near the bracket (red text should appear) and press enter:

 [ simplify((a and b) or (a and (not b)), logic)
 a

If you don't want to open a MuPAD notebook, try this in MATLAB:

 evalin(symengine, 'simplify((a and b) or (a and (not b)), logic)')

Though if you prefer to stay in MATLAB, you should take what Geoff suggests:

 syms a b;
 simplify((a & b) | (a & ~b))

(For some reason it did not work for me with the comma between a and b).

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Not sure what your X, Y, and Z are, but I assume it's something like DC2RF (Z) as a function of Gmag and Gphase. In that case, something like this might work:

Greal = Gmag.*cosd(Gphase);
Gimag = Gmag.*sind(Gphase);
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F = TriScatteredInterp(Greal,Gimag,DC2RF);
Z = F(X,Y);
h = polar([-pi pi], [0 1]);
delete(h)
hold on
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Best Answer

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