Dear list,



I want to make a plot based on the following information, using the command
plot.

variable A for x axis : temperature (range: -20 degrees to 40 degree)

variable B for y axis : altitude (range: 50 m to 2500 m )



The data below 0 degree of X variable wants to be erased tentatively.

Please kindly advise the command to extract the data ranging from 0 degree
to 40 degrees.

Thank you.



Elaine

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