Output numeric array from symbolic evaluation

2 vues (au cours des 30 derniers jours)
Rose Montgomery
Rose Montgomery le 13 Jan 2021
Commenté : Star Strider le 13 Jan 2021
I am trying to evaluate some symbolic functions at specific datapoints using nested loops and output the results to an array.
While the results in the output window are the numeric values, the array contents are not.
How can I correct this to get the numeric results in the array?
syms d1 d2 d3 ma mb x0 u3 u4;
ma = (d2-d1);
mb = (d3-d2);
x0 = ma*mb;
u3 = diff(x0,d3)
u4 = diff(x0,d2)
T = [];
next = 1;next1 = 1;next2=1;
for next2 = 1:35:5;
for next = 1:4;
%example values
b1 = 1*next/2;
b3 = b1+2;
for next1 = [0.05,0.1,0.4,0.65,0.9];
b2 = b1*next1;
z=vpa(subs(u3,{d1,d2,d3},{b1,b2,b3}),4)
g=vpa(subs(u4,{d1,d2,d3},{b1,b2,b3}),4)
T = [T;b1,b2,b3,z,g];
end
end
end
T
  1 commentaire
Rose Montgomery
Rose Montgomery le 13 Jan 2021
Modifié(e) : Rose Montgomery le 13 Jan 2021
Follow up for Star Strider - now how do I get T into Excel? I tried array2table with no luck.
Never mind, I got it....use double to convert T from vpa to numbers

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Réponse acceptée

Star Strider
Star Strider le 13 Jan 2021
After the loops:
T = vpa(T)
creates the entire array as decimal fractions.
  5 commentaires
Rose Montgomery
Rose Montgomery le 13 Jan 2021
Thanks again, Star Strider!!
Star Strider
Star Strider le 13 Jan 2021
As always, my pleasure!

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