Remove part elements of local list using regular expressions

[Jesper Eriksson]

Hi,

I have a local variable list that I would like to remove the prefixes. The list looks like this

local variables "i.Sex ib5.age10cat i.Inkomst_cat_Yearpresurgery i.Utb_cat_Yearpresurgery i.grpci i.FUNKTIONSBEDOMNING_ASA ib12.type_of_surgery_10cat i.Hospsize_cat d_age_operation elixsum "

My preferred result would look like this:

local variables_clean "Sex age10cat Inkomst_cat_Yearpresurgery Utb_cat_Yearpresurgery grpci FUNKTIONSBEDOMNING_ASA type_of_surgery_10cat Hospsize_cat d_age_operation elixsum "

I have tried the following, however the variable i.grpci looses the "i" in the end.

local variables "i.Sex ib5.age10cat i.Inkomst_cat_Yearpresurgery i.Utb_cat_Yearpresurgery i.grpci i.FUNKTIONSBEDOMNING_ASA ib12.type_of_surgery_10cat i.Hospsize_cat d_age_operation elixsum "
di "`variables'"
local variables_clean = ustrregexra("`variables'", "i[^\.]*\.", "", .)
di "`variables_clean'"

Any suggestions?

Best regards, Jesper

[Andrew Musau]

local variables "i.Sex ib5.age10cat i.Inkomst_cat_Yearpresurgery i.Utb_cat_Yearpresurgery i.grpci i.FUNKTIONSBEDOMNING_ASA ib12.type_of_surgery_10cat i.Hospsize_cat d_age_operation elixsum "
local variables = "`=ustrregexra("`variables'", "\bi\.\b|\bib[\d]+\.\b","")'"

Res.:

. di "`variables'"
Sex age10cat Inkomst_cat_Yearpresurgery Utb_cat_Yearpresurgery grpci FUNKTIONSBEDOMNING_ASA type_of_surgery_10cat Hospsize_cat d_age_operation elixsum

[Jesper Eriksson]

local variables "i.Sex ib5.age10cat i.Inkomst_cat_Yearpresurgery i.Utb_cat_Yearpresurgery i.grpci i.FUNKTIONSBEDOMNING_ASA ib12.type_of_surgery_10cat i.Hospsize_cat d_age_operation elixsum "
local variables = "`=ustrregexra("`variables'", "\bi\.\b|\bib[\d]+\.\b","")'"

Res.:

. di "`variables'"
Sex age10cat Inkomst_cat_Yearpresurgery Utb_cat_Yearpresurgery grpci FUNKTIONSBEDOMNING_ASA type_of_surgery_10cat Hospsize_cat d_age_operation elixsum

Superfast and super-great answer. Many thanks.