Good point by Jamie Hockin. We should incorporate into histogram (and
epicurve) the ability to define length of interval.
Until this is done users can work like this (in the test version)
* generate the grouped variable: (age into five year groups)
gen i ag = age div 5
labelvalue ag /3="<20" /4="20-24" /5="25-29" /etc ....... (3 because in
this example 16 was the minimum age)
histogram ag /xa // which will work as desired
I fully agree. I think there is a need of a date-time variable at least in
Analysis. That can allow users to group cases in different periods of time
(hours or days) with the complexity of reprograming as we have to do now.
We also need the posibility of labelling the epicurve at two diferent
levels in the time axis so that we can clearly see days an hours for
This is more or less solved in EpiInfo for Windows (the grouping part).
Jens, maybe you can have a look at the specifications for the epicurve I
sent you earlier this year.
Another question regarding some of the graphs is the need of doing the
graph by a second variable for example bar agegroup by sex or line month
Thanks a lot Jens for all this job
and thanks every body for their comments
> I agree. However, the question of x-axis increment is not fully defined.
> There are two aspects to this. The usual option /xinc= will only affect
> the labelling on the chart, as with other graphs. However, the interval
> used to define boxes is something that should also be an option with
> histogram. This is particularly important for epicurves. This means that
> we can avoid awkward recoding of variables (especially tricky with
> dates) to have an epicurve that groups cases by 4-hour intervals, for
> example, and also labels the x-axis every 12 hours:
> epicurve onsettime case /xinc=12 /interval=4
> The same would be true of a histogram by age, where we wanted age
> grouped by 5 years. I would prefer
> his age /interval=5 /xinc=10
> define age5 ##
> age5 = age div 5
> his age5 /interval=5
> Right now, his and epicurve are constrained to intervals of 1, which
> means that labelling is not always correct.
> Jamie Hockin
> Public Health Agency of Canada
> Jens wrote:
>> After constructive comments from Egil Arnesen in Tromsø, Norway and
>> searching in various textbooks I have decided that for v2 the
>> following two definitions will be implemented:
>> A graph, where there is one bar for each value present in the data.
>> The height of the bar corresponds to the count of records in the data.
>> (possibly later the percentage of data). Each bar starts at the
>> x-value which was in the data (e.g. age 45 is shown from 45-46.) And
>> the width of one bar is the same as the unit of the x variable.
>> The X-axis is numerical and can be scaled with minimum, maximum and
>> increase.E.g. from 25 to 100 with tickmarks by 5 (25 30 35 ......95
>> A graph, where there is one bar for each value represented in the
>> data. The X-axis is categorical and the bar is centered around the
>> tick mark, which would show the value label (or the value) given by
>> the x value.
>> If anyone has comments to this please send to this list.
>> The principle of the histogram will be implemented also for EpiCurve
>> (but has not been done yet). The mentioned implementation of bar and
>> histogram should work from build 112 uploaded shortly before this
>> mail. (Minor problem with the build 112 uploaded yesterday).
> End of EpiData-list Digest, Vol 43, Issue 5
After constructive comments from Egil Arnesen in Tromsø, Norway and
searching in various textbooks I have decided that for v2 the following
two definitions will be implemented:
A graph, where there is one bar for each value present in the data. The
height of the bar corresponds to the count of records in the data.
(possibly later the percentage of data). Each bar starts at the x-value
which was in the data (e.g. age 45 is shown from 45-46.) And the width
of one bar is the same as the unit of the x variable.
The X-axis is numerical and can be scaled with minimum, maximum and
increase.E.g. from 25 to 100 with tickmarks by 5 (25 30 35 ......95 100)
A graph, where there is one bar for each value represented in the data.
The X-axis is categorical and the bar is centered around the tick mark,
which would show the value label (or the value) given by the x value.
If anyone has comments to this please send to this list.
The principle of the histogram will be implemented also for EpiCurve
(but has not been done yet). The mentioned implementation of bar and
histogram should work from build 112 uploaded shortly before this mail.
(Minor problem with the build 112 uploaded yesterday).
Build 112 of analysis has been uploaded for testing. Users are
encouraged to try the following:
* Install routine
* new table command
* epicurve dotplot cdfplot
* Spc routines
* reading and saving files
_Known issues and comments_
* Default sorting of non-integer reals in tables
* Histogram error (rightmost bar not shown)
* Notice /cc changed to /nm in tables
* recode v1 to v2 by x gives partial errors (e.g. 10-1 09)
* possibly help file principle partially correct
writing word in command prompt via F1 link to help file
* All fields saved correctly (?)
* EpiCurve Final
* Added Upper Case fields
* New graphs: Histogram refined (xinc xmin and xmax working)
* Clarified help file (F1)
* (other bugs removed)
* test of date correctness
* added protection against reserved terms(e.g. date)
The addition of upper case fields had consequences in many areas.
Previously analysis did not compare strings correctly. Before release
as version 2 the following will be added:
Writing chk files, Translation of menu's,
Dialog for the new tables module, fixing bugs
A very belated thanks Jens for your response! Looking forward to new
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Je suis actuellement absent du bureau.Je serai de retour le 21 mai 2007
Je répondrai à cette date à votre message
I am currently out of the office and will be back on May the 21st 2007
I will reply to your message then.
All the best
I'm new to Epidata and have worked with it for about a week now.
It's running on various PCs with Windows XP, connected in a network.
Now, however, a problem has occured, that the application refuses to run on any of the computers connected to the network. Upon start it looks like the app will start as normal, but then will remain as a minimized application in the taskbar. I've tried to start it both by using the shortcut on the desktop and by clicking the datafile I am working with directly, however nothing really worked.
Does anybody have a clue what might be the source of the problem?
And if I cannot avoid to reinstall the software, do I need to backup my data?
Sorry for my poor language proficiency and the relatively simple-looking problem I have.
Thanks in advance.
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