solve function results come as function not numbers

I'm trying to solve an equation using solve functuion and it did solve it correctly but the output resulrs comes as a function not numbers the code is below

clc

clear all

close all

syms n

p=4;

v=230;

R=0.2;

f=input('f = ')

Ns=120*f/p;

s=(Ns-n)/Ns;

VLL=v*sqrt(3);

Pg=3*v^2*s/R;

Pd=Pg*(1-s);

Po=10.5*1000*(n/1800)^3;

eqn=Pd-Po;

S=solve(eqn,n);

n= S(S>0);

P_out=Po/1000;

R=[f VLL n P_out]

command window results :

f =

60

R =

[ 60, 7008228810380513/17592186044416, (20700*557^(1/2))/7 - 476100/7, (7*n^3)/3888000000]

Answer 1

[Sulaymon Eshkabilov]

Here is the corrected part of your code:

...
n= double(S(double(S)>0));
P_out=subs(Po/1000, n);
R=double([f VLL n P_out])

[Abdullah Ismail]

thank you it worked but the results comes multipled by 1e+03 why ? and how to solve this

command window results :

f = 60

R =

1.0e+03 *

0.060000000000000 0.398371685740842 1.776791722560884 0.010099069262302

>>

[Sulaymon Eshkabilov]

This is correct. This is how matlab displays floating point data by your matlab format display settings. You can change data display format settings using format eng or format short eng or format rat or ....