Error using .* Matrix dimensions must agree. Error in eff_vs_length (line 20) Ty1=1-exp((-U.*AsurY)./(m.*C)) >>
1 view (last 30 days)
Show older comments
L=9.512;
Y=0:9.512;
m=0.11;
C=1007;
D=0.18;
AsurL=pi*D*L;
AsurY=pi*D*Y;
r1=0.043;
r2=0.045;
r3=0.090;
Rc=1./(AsurL*h);
Rp=(ln((r2)/(r1))./(2*pi*L*Kp));
Rg=(ln((r3)/(r2))./(2*pi*L*Kg));
Rt=Rc+Rp+Rg;
U=1./Rt;
Tg=30;
Tair=25;
Ty1=1-exp((-U.*AsurY)./(m.*C))
0 Comments
Answers (1)
KALYAN ACHARJYA
on 21 Nov 2020
Edited: KALYAN ACHARJYA
on 22 Nov 2020
Please define h,Kp and Kg
h=...?
Kp=..?
Kg=....? % Assumning all are scalar
%
L=9.512;
Y=0:9.512;
m=0.11;
C=1007;
D=0.18;
AsurL=pi*D*L;
AsurY=pi*D*Y;
r1=0.043;
r2=0.045;
r3=0.090;
Rc=1./(AsurL*h);
Rp=(log((r2)/(r1))/(2*pi*L*Kp));
Rg=(log((r3)/(r2))/(2*pi*L*Kg));
Rt=Rc+Rp+Rg;
U=1/Rt;
Tg=30;
Tair=25;
Ty1=1-exp((-U*AsurY)/(m*C))
3 Comments
Image Analyst
on 21 Nov 2020
Why didn't you answer his question? Anyway, this runs without error for me:
h=1
Kp=1
Kg=1
L=9.512;
Y=0:9.512;
m=0.11;
C=1007;
D=0.18;
AsurL=pi*D*L;
AsurY=pi*D*Y;
r1=0.043;
r2=0.045;
r3=0.090;
Rc=1./(AsurL*h);
Rp=(log((r2)/(r1))./(2*pi*L*Kp));
Rg=(log((r3)/(r2))./(2*pi*L*Kg));
Rt=Rc+Rp+Rg;
U=1./Rt;
Tg=30;
Tair=25;
Ty1=1-exp((-U.*AsurY)./(m.*C))
Besides, there are no matrices or vectors even IN your code so the error you gave could not possibly occur with that code. Everything inside parentheses is a constant and that constant is not being used as an index to any array. log() and exp() are functions, unless you defined then elsewhere (in another m-file or on the command line) to be arrays and overwrote the original functions that they are.
KALYAN ACHARJYA
on 22 Nov 2020
@Image Analyst, Sorry sir, I missed the title of the question. Thank you for your detailed comment.
See Also
Categories
Find more on Matrix Indexing in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!