Error while trying to collapse data using semean

[preeti singh]

Hello team,
I am trying to collapse my dataset by mean and semean. I used the following syntax:
local endsys
local group1 visitinobs_grp
local group2 hypertensive
collapse (mean) sysmean=`varname' (semean) syssemean=`varname', by (`group1' `group2')

However, I am repeatedly getting the following error:
variablesemean not found

Please help! Below is the sub-set of my data.

* Example generated by -dataex-. To install: ssc install dataex
clear
input float(endsys visitinobs_grp) byte hypertensive
132 4 1
164 2 1
160 1 1
136 6 0
139 2 0
120 2 0
120 3 0
139 4 0
103 2 1
144 5 1
129 0 1
133 0 0
135 1 1
end
[/CODE]

[preeti singh]

Sorry, there was an error in my command. Correct command is:
local varname endsys
local group1 visitinobs_grp
local group2 hypertensive
collapse (mean) sysmean=`varname' (semean) syssemean=`varname', by (`group1' `group2')

I have got the desired output. Thanks anyway!