MATLAB symbolic to double error
1 view (last 30 days)
Show older comments
Hi, I am trying to run this code but there are errors. I don't know how to remove them. Here is code: This error comes when converting symbolic to double. Any help much appreciated.
clear all;
clc;
nel=4; % number of elements
totlength=10;
nne=3;
nnp=2*nel+1;
le=totlength/nel;
x=0:le:totlength;
element_nodes=[1:2:(nnp-2);2:2:(nnp-1);3:2:nnp]';
%element_nodes=[1:nel;2:nnp]';
B=[];
syms xlc
%Finding out B matrix
for i=1:1:nel
j=element_nodes(i,1)
B(i)=[(2*xlc-x(i+2)-x(j+1))/(2*le^2),(2*xlc-x(j+2)-x(i))/(-1*le^2),(2*xlc-x(j+1)-x(i))/(2*le^2)];
end
Any help or suggestions? Thanks.
0 Comments
Answers (1)
Walter Roberson
on 7 Nov 2013
Experiment with starting with
B = sym([]);
I think you are going to have trouble with your assignment to B(i) anyhow, as you appear to be attempting to assign a list of 3 elements into a single storage location.
5 Comments
Walter Roberson
on 7 Nov 2013
B = sym([]);
And in the loop,
B(i,:) = [(2*xlc-x(i+2)-x(j+1))/(2*le^2),(2*xlc-x(j+2)-x(i))/(-1*le^2),(2*xlc-x(j+1)-x(i))/(2*le^2)];
See Also
Categories
Find more on Assumptions 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!