How I can code ||x||=1 with first component x1>0, x is vector

How I can code |x|=1 with first component x1>0, x is vector

[James Tursa]

Please provide more detail. What problem are you solving with the code? How will this be used downstream in your code? Etc.

Answer 1

[Dimitris Kalogiros]

You can use norm or vecnorm .

For example (and by usage of symbolic math toolbox):

clc;close all; clc

X=sym('X', [1, 3])

eq=norm(X)==1

You will receive: