How to use find() to find unique values in equations?

1 view (last 30 days)
Assume I have the following surfaces:
z1 = x + y and z2 = 2x + y
How can I use the find() function to find unique values of z for each equation given the same x and y values. By unique I mean values of z1 or z2 that are unique to each respective equation. For example, x and y = 0 would both give the same value for z1 and z2. That's what not what I care about. What I care about is knowing x and y values where z1 and z2 are both different.
I'm new to this so I might need a bit of a step-by-step explanation.
Thank you

Answers (1)

Azzi Abdelmalek
Azzi Abdelmalek on 30 Mar 2014
Example
x=10;
y=20
z1 = x + y
z2 = 2x + y
idx=z1==z2 % if idx is equal to 0, that means z1 and z2 are different
  4 Comments
A
A on 31 Mar 2014
Assume they have a range from -10 to 10.
Thank you
Azzi Abdelmalek
Azzi Abdelmalek on 31 Mar 2014
From your equations, z1 and a2 are equals if x+y is equal to 2*x+y, which means 2x=x, no matter what y is.
you don't need Matlab to resolve this, the solutions are (0,y), y belong to [-10,10]

Sign in to comment.

Categories

Find more on Programming 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!