Why Does This Definition of a Piecewise Function Produce a Warning Message?

3 views (last 30 days)
MATLAB issues a warning when defining the below piecewise function
syms y(x); y(x) = piecewise(x<1, x+1, 1<=x<2, x-1);
But when I write
y(x) = piecewise(x<1, x+1, (1<=x) & (x<2), x-1);
the warning message disappears. Could someone point to an example where those two ways of defining a piecewise function produce different results? It seems here that they give identical results.

Accepted Answer

Benjamin Thompson
Benjamin Thompson on 31 Jan 2022
This is just a warning about good programming syntax. Good programming style is to never leave order of operations in doubt, and add parenthesis where needed to clarify order of operations. While a <= b <= c is good mathematical notation, it may no be clear to a compiler or interpreter how the expression must be evaluated.
  3 Comments

Sign in to comment.

More Answers (0)

Categories

Find more on Scope Variables and Generate Names in Help Center and File Exchange

Products


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!