I am getting NaN as answer in the code, can please give me some advice

1 view (last 30 days)
I have attached the code in a comment , if you guys have any advice thank you
  1 Comment
alberto ortiz
alberto ortiz on 28 Oct 2016
Edited: alberto ortiz on 28 Oct 2016
yes I solved by A=zeros(239,239) and B=zeros(239,1) ,,, I am getting all the temperatures for the nodes, yet when I tried to plot it in using the code attached it tells me that index exceeds matrix dimension , any advice ? and thank you very much

Sign in to comment.

Accepted Answer

Walter Roberson
Walter Roberson on 29 Oct 2016
What is your line
T_new=T(1:182,T_1,183:207,T_1,200:216,T_2,217:233,T_2)
intended to mean?
I suspect you want
T_new=T(1:182, [T_1,183:207,T_1,200:216,T_2,217:233,T_2])
Note: your T_1 and T_2 are empty. You assigned them on the line above with
T_1=t_i*ones(8:1)
T_2=t_i*ones(16:1)
which should probably be
T_1=t_i*ones(1, 8);
T_2=t_i*ones(1, 16);
  8 Comments
alberto ortiz
alberto ortiz on 30 Oct 2016
yes I just saw my mistake thank you very much , I am correcting the code , so edge 182 should be 190. edge 207 should be 215, edge 199 should be 207 , edge 216 should be 232 and edge 233 is 249. Thank you very much for your help
alberto ortiz
alberto ortiz on 30 Oct 2016
Thank you , now T_new has the nodes for the fluid temperature and how should I add the previous matrix T so is all a matrix (33 by 9) with T and the four T_new?

Sign in to comment.

More Answers (1)

LauraLee Austin
LauraLee Austin on 28 Oct 2016
inv(A) generates a matrix of inf's, B contains 0's, inf*0 = NaN

Categories

Find more on Fluid Network Interfaces Library in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!