[Clyde Schechter]

when I want to drop period between 2021/05 to 2021/09:
I run this codes but it made an error:

drop if mdate==2021m05

drop if inrange(mdate, tm(2021m5), tm(2021m9))

Furthermore, I need to separate countries to exporters and importers, would you help me how could I do that?

How do you know which countries or exporters and which are importers? There is nothing in the example data that I can see that indicates that.

And again, we are going off topic here. Please start a new thread.

[Adoration Chigere]

Hi everyone, Please I am just learning STATA, and I need assistance. So I have 2 seperate variable as Systolic and Diastolic. I am now trying to write a condition where STATA can return "normal" for me where the systolic is <=140, and "Abnormal" where it is >140,

Here is what I have written that returns the error code "Abnormal not allowed"

*for the Systolic
generate SysBldPressure = cond(Systolic=<140, "Normal", "Abnormal")

[Adoration Chigere]

Hi everyone, Please I am just learning STATA, and I need assistance. So I have 2 seperate variable as Systolic and Diastolic. I am now trying to write a condition where STATA can return "normal" for me where the systolic is <=140, and "Abnormal" where it is >140,

Here is what I have written that returns the error code "Abnormal not allowed"

*for the Systolic
generate SysBldPressure = cond(Systolic=<140, "Normal", "Abnormal")