solve returns Empty sym: 0-by-1 answer

86 ビュー (過去 30 日間)
José Miguel Rivera Navarrete
José Miguel Rivera Navarrete 2021 年 11 月 16 日
回答済み: Pavan Guntha 2021 年 11 月 19 日
syms h
Tcz=20
To=533.3
k=155
rho=2680
c=963
a=k/(rho*c)
E2=73.1==To+(Tcz-To)*(1-exp((h*h*a*90)/(k*k))*(1-erf((h/k)*(sqrt(a*90)))))
assume(h>0)
[htc]=solve(E2,h)
the code returns
htc=
Empty sym: 0-by-1

回答 (1 件)

Pavan Guntha
Pavan Guntha 2021 年 11 月 19 日
Hi,
The solve function returns an empty object if there isn't any solution to the equation. For instance if the equation is changed as shown below,
E2 = 730 == To+(Tcz-To)*(1-exp((h*h*a*90)/(k*k))*(1-erf((h/k)*(sqrt(a*90)))))
It returns the following solution:
htc =
-555.33097392244426184617865401959
For more information, you could look at the documentation page of solve.
Hope it helps!

製品


リリース

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by