Note that the alternative approach of assigning a date format to a
monthly date variable doesn't seem to help enough.
gen mydate = ym(year, month)
format mydate %tmm_CY
followed by a graph with -by(mydate)- just uses the numbers and not the
format. Mapping that to a string causes display in alphabetical order
(all Aprils first) which is unlikely to be helpful.
-catplot- is a user-written command from SSC, but is not causing this
behaviour. -graph bar, by()- is responsible.
Perhaps there is a work-around.
Nick
[email protected]
Martin Weiss
*************
clear*
set obs 100
gen id=_n // subject id
gen month=1 + int(12*uniform())
gen year=2008 + int(2*uniform())
gen subject_type=1 + int(3*uniform())
la def lab_subjects 1 "no reply" 2 "screened" 3 "sampled", modify
la val subject_type lab_subjects
list, noo
compress
//from http://www.stata-journal.com/sjpdf.html?articlenum=pr0013
//follow special sequences
//generate label for months
tokenize `c(Months)'
forvalues i = 1/12 {
label def month `i' "``i''" , modify
}
label val month month
decode month, generate(mon)
gen yearmonth= mon + " " + string(year)
catplot bar subject_type, by(yearmonth) stack asyvars ///
bar(1, bcolor(red)) ///
bar(2, bcolor(yellow)) ///
bar(3, bcolor(green))
*************
Michael McCulloch
I'd appreciate any feedback on this question: I'd like to create a
variable m_y, which I can sort in order of month over several years.
I've simulated data with:
. clear
. set obs 100
. gen id=_n // subject id
. gen month=1 + int(12*uniform())
. gen year=2008 + int(2*uniform())
. gen subject_type=1 + int(3*uniform())
. la def lab_subjects 1 "no reply" 2 "screened" 3 "sampled", modify
. la val subject_type lab_subjects
. list, noo
But, I'd like guidance on how to combine month and year into one
ordered variable, to appear with labels such as:
Jan 2008
Feb 2008
...
Jan 2009
Feb 2009
That ordered variable would then be displayed in the -by(month)-
option in this graph:
. catplot bar subject_type, by(month) stack asyvars ///
bar(1, bcolor(red)) ///
bar(2, bcolor(yellow)) ///
bar(3, bcolor(green))
I could use both -over- and -by-, but that looks awkward:
. catplot bar subject_type, by(year) over(month) stack asyvars
///
bar(1, bcolor(red)) ///
bar(2, bcolor(yellow)) ///
bar(3, bcolor(green))
*
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