Why is the word "and" coming up in my output?
1 view (last 30 days)
Show older comments
I am trying to simplify an expression, but the word "and" keeps popping up in my result. When I try to work with this further, I get, "unexpected matlab expression." My script is:
syms A B C D p q r s t u;
y00 = cos(A + B + C + D);
y0 = expand(y00);
y1 = subs(y0,cos(A),(cosh(p)*cosh(q)-cosh(t)) / (sinh(p)*sinh(q)));
y2 = subs(y1,cos(B),(cosh(q)*cosh(r)-cosh(u)) / (sinh(q)*sinh(r)));
y3 = subs(y2,cos(C),(cosh(r)*cosh(s)-cosh(t)) / (sinh(r)*sinh(s)));
y4 = subs(y3,cos(D),(cosh(s)*cosh(p)-cosh(u)) / (sinh(s)*sinh(p)));
y5 = subs(y4,sin(A),(1-cosh(p)^2-cosh(q)^2-cosh(t)^2+cosh(p)*cosh(q)&cosh(t)) / (sinh(p)*sinh(q)));
y6 = subs(y5,sin(B),(1-cosh(q)^2-cosh(r)^2-cosh(u)^2+cosh(q)*cosh(r)&cosh(u)) / (sinh(q)*sinh(r)));
y7 = subs(y6,sin(C),(1-cosh(r)^2-cosh(s)^2-cosh(t)^2+cosh(r)*cosh(s)&cosh(t)) / (s inh(r)*sinh(s)));
y8 = subs(y7,sin(D),(1-cosh(s)^2-cosh(p)^2-cosh(u)^2+cosh(s)*cosh(p)&cosh(u)) / (sinh(s)*sinh(p)));
y8
the answer that I keep getting is:
y8 =
(((cosh(u) and cosh(q)*cosh(r) - cosh(q)^2 - cosh(r)^2 - cosh(u)^2 + 1)*(cosh(t) and cosh(p)*cosh(q) - cosh(p)^2 - cosh(q)^2 - cosh(t)^2 + 1))*(cosh(u) and cosh(p)*cosh(s) - cosh(p)^2 - cosh(s)^2 - cosh(u)^2 + 1)*(cosh(t) and cosh(r)*cosh(s) - cosh(r)^2 - cosh(s)^2 - cosh(t)^2 + 1))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) - (((cosh(t) and cosh(p)*cosh(q) - cosh(p)^2 - cosh(q)^2 - cosh(t)^2 + 1)*(cosh(u) and cosh(p)*cosh(s) - cosh(p)^2 - cosh(s)^2 - cosh(u)^2 + 1))*(cosh(u) - cosh(q)*cosh(r))*(cosh(t) - cosh(r)*cosh(s)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) - (((cosh(t) and cosh(p)*cosh(q) - cosh(p)^2 - cosh(q)^2 - cosh(t)^2 + 1)*(cosh(u) and cosh(q)*cosh(r) - cosh(q)^2 - cosh(r)^2 - cosh(u)^2 + 1))*(cosh(u) - cosh(p)*cosh(s))*(cosh(t) - cosh(r)*cosh(s)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) - (((cosh(t) and cosh(p)*cosh(q) - cosh(p)^2 - cosh(q)^2 - cosh(t)^2 + 1)*(cosh(t) and cosh(r)*cosh(s) - cosh(r)^2 - cosh(s)^2 - cosh(t)^2 + 1))*(cosh(u) - cosh(p)*cosh(s))*(cosh(u) - cosh(q)*cosh(r)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) - (((cosh(u) and cosh(q)*cosh(r) - cosh(q)^2 - cosh(r)^2 - cosh(u)^2 + 1)*(cosh(u) and cosh(p)*cosh(s) - cosh(p)^2 - cosh(s)^2 - cosh(u)^2 + 1))*(cosh(t) - cosh(p)*cosh(q))*(cosh(t) - cosh(r)*cosh(s)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) - (((cosh(u) and cosh(q)*cosh(r) - cosh(q)^2 - cosh(r)^2 - cosh(u)^2 + 1)*(cosh(t) and cosh(r)*cosh(s) - cosh(r)^2 - cosh(s)^2 - cosh(t)^2 + 1))*(cosh(t) - cosh(p)*cosh(q))*(cosh(u) - cosh(p)*cosh(s)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) - (((cosh(t) and cosh(r)*cosh(s) - cosh(r)^2 - cosh(s)^2 - cosh(t)^2 + 1)*(cosh(u) and cosh(p)*cosh(s) - cosh(p)^2 - cosh(s)^2 - cosh(u)^2 + 1))*(cosh(t) - cosh(p)*cosh(q))*(cosh(u) - cosh(q)*cosh(r)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2) + ((cosh(t) - cosh(p)*cosh(q))*(cosh(u) - cosh(p)*cosh(s))*(cosh(u) - cosh(q)*cosh(r))*(cosh(t) - cosh(r)*cosh(s)))/(sinh(p)^2*sinh(q)^2*sinh(r)^2*sinh(s)^2)
when I try to do
factor(y8)
I get "unexpected matlab expression," pointing to the "and." Could anyone help me with this? Thanks
0 Comments
Accepted Answer
Mischa Kim
on 10 May 2014
Edited: Mischa Kim
on 10 May 2014
Lucy, for example, in the expression for y5 there is a term
cosh(p)*cosh(q)&cosh(t)
(typo?) which results in an and. The same (copy-paste?) happens in the other expressions, y6 thru y8.
More Answers (0)
See Also
Categories
Find more on Logical 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!