Hello , I'm new to Smath , when trying to plot a picewise function using x-y plot or native 2D plot , I run into problem below:
the plot does not appear , but when i pass individual number as the value of variable x , it can give me correct result.
can you give me some advice about solving it? many thanks!
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I have also tried to change the form of th function , see below , but still it does not help.

Did you try to adjust the y axis range? Both plot regions don't have auto-adjustment.

Wrote

Did you try to adjust the y axis range? Both plot regions don't have auto-adjustment.

yes! it works, sincere thanks for your warm-hearted advice!

With X-Y Plugin you could anyway set up auto-adjustment of the axis range, please check Martin's (super-useful) Interactive Handbook to see how to use the related parameters correctly.
This feature is not available in native SMath plot.

Bye