How I plot Voltage vs Temperature in xschem

.dc temp -40 125 0.1

in ngspice:

plot vref vs "temp-sweep"

@Stefan Schippers I tried but not getting.

inside a .control do not use

.dc

but use

dc

. you need to quote "`temp-sweep"`, to avoid ngspice confusing with

temp

minus

sweep

.

.control

...

...

dc temp -40 125 0.1

plot vref vs "temp-sweep"

...

.endc

Thanks @Stefan Schippers its working now