Team Desmos

posted this on November 21, 2012 19:23

To limit the domain or range (x or y values of a graph), you can add the restriction to the end of your equation in curly brackets {}. For example, y=2x{x>0} would graph the line y=2x for x values greater than 0.

To try it out in Desmos, click the Restrictions Tour in the help menu:

## Comments

fsdgadsfgad

that is very helpful, can you show us how to do a step peicewise?

More:

- you can cumulate conditions: y = sin ( x/a ) { a > 0 } { 0 <= x <= a*pi }

- for parametrics curve, the condition must be *in* the parenthesis: ( t, sin ( t/a ) { a > 0 } )

- you can also use the "if elseif else" version : y = { a <= 0 : 0 , 0 <= x <= a*pi : sin ( x/a ) , 0 )

with any number of cond : expression terms, and the default (final) expression is not mandatory

It's missing the very important part, making piecewise function in single line, so that when you differentiate it or use it in any why elsewhere, the function remains whole. Syntax is:

F(x)={x≤0 : x², 0<x<π/2 : 2x/π, x≥π/2 : sin(x)}

Now it's usable in any situation, for instance:

https://www.desmos.com/calculator/y9bbgn6ul9

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