# jacobian

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jacobian calculates the symbolic Jacobian $$df/dx$$ of a polynomial $$f(x)$$.

### Syntax

J = jacobian(f,x)


### Examples

With only 1 argument, the differentiation is performed with respect to all involved variables (more precisely, with respect to the variables ecover(depends(f)))

x1 = sdpvar(1,1);
x2 = sdpvar(1,1);
f = x1^2+5*x2^2;
sdisplay(jacobian(f))
ans =
'2*x1'   '10*x2'


Giving a second argument controls what variables to differentiate with respect to

sdisplay(jacobian(f,x2))
ans =
'10*x2'