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st: Graphing monthly (time series) data in STATA 11
From
"Broca, Sumiter (FAORAP)" <[email protected]>
To
[email protected]
Subject
st: Graphing monthly (time series) data in STATA 11
Date
Sun, 02 May 2010 19:11:16 +0700
Dear Statalist,
I have the following MONTHLY data on wholesale rice prices (Riel / kg.) in
Phnom-Penh, in the format in which they were downloaded (as a CSV file) from
http://www.fao.org/giews/pricetool/ .
date ricepr
01/01/2006 700
01/02/2006 700
01/03/2006 900
01/04/2006 900
01/05/2006 900
01/06/2006 900
01/07/2006 900
01/08/2006 933.33
01/09/2006 1000
01/10/2006 1000
01/11/2006 1000
01/12/2006 1000
01/01/2007 1050
01/02/2007 1087.5
01/03/2007 1100
01/04/2007 1100
01/05/2007 1100
01/06/2007 1100
01/07/2007 1175
01/08/2007 1200
01/09/2007 1200
01/10/2007 1300
01/11/2007 1400
01/12/2007 1400
1. I read the data into STATA 11 and then changed the "Date" variable into a
time variable with the command:
gen date2 = date(date, "DMY").
2. I formatted date2 with the following command:
format date2 %td
2. de gives the following output:
Contains data
obs: 24
vars: 3
size: 528 (99.9% of memory free)
-----------------------------------------------------------------------------
----------------------------
storage display value
variable name type format label variable label
-----------------------------------------------------------------------------
----------------------------
date str10 %10s Date
ricepr float %8.0g Cambodia, Phnom Penh, Rice
(Mix), Wholesale, Riel, Kg
date2 float %td
-----------------------------------------------------------------------------
----------------------------
Sorted by:
Note: dataset has changed since last saved
3. Then I tried to graph the data with the following command:
line ricepr date2.
4. When the graph appeared in the graph window, it had the following (ugly)
labels on the x-axis:
01jan2006-------01apr2006---------01jul2006--------01oct2006-----------01jan2
007
5. Ideally I would like to get a nice set of x-axis labels that look like
this:
J--F--M--A--M--J--J--A--S--O--N--D--J--F--M--A--M--J--J--A--S--O--N--D
2006
2007
5. Or the following, where each tick (|) represents a month, but is not
labelled with the month name:
| | | | | | | | | | |
| | | | | | | | | | |
| | |
-----------------------------------------------------------------------------
----------------------------------
2006
2007
2008
6. I would be grateful for any help from STATALIST members on this matter.
Thank you.
Sumiter.
Sumiter Singh Broca,
Policy Officer, Policy Assistance Branch
FAO Regional Office for Asia and the Pacific (RAP)
Maliwan Mansion, 39 Phra Atit Road
Bangkok 10200, Thailand
Tel: (66-2) 697-4324
Fax: (66-2) 697-4445 or 697 4409
E-Mail: [email protected]
RAP web site: http://www.fao.org/world/regional/rap/index.asp
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