Undefined function 'sind' for input arguments of type 'sym'.

Hello,

Is it not express a symbolic trigonometric function in degrees? It would save me a lot of converting if it is.

Kind regards,

Tom

[NARESH BILONIYA]

n = [ 7 1 9 14 12 ]  
% n1 = randi([0 , 1],5,4)  method 2

x = de2bi(n) ;

L1 = numel(x)  ;
y = fliplr(x)  

syms p1 ;
syms p2 ;
syms p3 ;

q1 = [p1; p1; p1; p1; p1 ] ;     

q2 = [p2; p2; p2; p2; p2 ] ;

q3 = [p3; p3; p3; p3; p3 ] ;

c  =   [q1  q2  y(:,1) q3  y(:,2:4) ]
c(4,2)           

for I=1:5
    for J=3:2:5
    if  xor( c(I,J),c(I,J+2) ) ==0 
        c(I,1)=0
    else
        c(I,1)=1
    end
    end
end

i am getting

" ??? Undefined function or method 'xor'
for input arguments of type 'sym'.

Error in ==> Untitled2 at 39
    if  xor( c(I,J),c(I,J+2) ) ==0
  "

how to solve it ??

[Image Analyst]

Try NOT making p1,p2,p3 syms, and just assign some actual values to them.

Answer 1

[Mischa Kim]

Yep, you need to use sin. Convert angles in degrees to rad via

 angle_rad = angle_deg * (pi/180);

As an example

 syms t
 a = sin(t);
 double(subs(a,t,90*(pi/180)))
 ans =
     1

[Walter Roberson]

sind = @(ang) sin(ang * sym('pi') / sym(180))