symbolically show the constraints

[styw1234]

x=sdpvar(1,2)
y=2*sum(x)

As is known to all, we can use 'sdisplay' to symbolically show the unknown variable y with 'y=2*(x(1)+x(2))'
Then how to symbolically show the constraints?

[johanlofberg]

Unclear what you are talking about as you haven't defined any constraint, you've simply done an assignment. If you sdisplay(y) it will show 2x(1)+2x(2) as expected

[styw1234]

The constraints are denoted as follows.
x=sdpvar(1,2)
y=2*sum(x)
con=[];
con=[con,0<=x<=3,1<=sum(x)<=5]
how to display the constraints as
x(1)+x(2)<=5
-x(1)-x(2)<=-1
x(1)<=3
-x(1)<=0
x(2)<=3
-x(2)<=0

[johanlofberg]

the closest you can do is sdisplay(sdpvar(con))

[styw1234]

OK! Thank you very much!