Re: st: Fwd: Graphs and xscale option: plotting only an excerpt of the original distribution of variables

[Rüdiger Vollmeier <ruediger.vollmeier@googlemail.com>]

Dear Nic,

I used the xscale(range(.1 .5)) option  which - unfortunately - does
not work, i.e.

cumul Var, gen(PTI1)
cumul Var_2, gen(PTI2)
cumul Var_3, gen(PTI3)

stack  PTI1 Var  PTI2 Var_2 PTI3 Var_3, into(c temp) wide clear
line PTI1 PTI2 PTI3 temp, sort xscale(range(0.1 .5))


Any idea why (I checked whether it has something to do with missing
values - even if I exclude them, things do not work)?

2013/11/28 Nick Cox <njcoxstata@gmail.com>:
> -distplot- is from the Stata Journal. Let me repeat a longstanding
> request, explicit in the FAQ, that you explain where user-written
> programs you refer to come from.
>
> As you imply, -if- and -in- with -distplot- work as usual with Stata
> commands in selecting which observations in your data are used. There
> is no option to select only part of the distribution functions for
> display and (I gather) no plan to add such an option.
>
> Saying -xscale( r( ) )- does not work is misleading here: it is
> standard that -xscale( r() )- cannot be used to restrict what is
> shown, only to extend the x axis.
>
> The easy option for you is to use -cumul- to calculate the
> distribution functions and then plot what you want.
>
> I don't see that your other statement is correct: i.e. that your
> problem would occur
> for any graph command. If you have access to variables holding the
> distribution functions you can control which values are shown on a
> graph.
> Nick
> njcoxstata@gmail.com
>
>
> On 28 November 2013 10:36, Rüdiger Vollmeier
> <ruediger.vollmeier@googlemail.com> wrote:
>> Hello,
>>
>> I want to plot only part of a cumulative distribution. I.e. using
>> -distplot- to plot the following CDFs (but the basic problem is
>> independet of the Stata command used, i.e. it would ocurr for any
>> Stata command e.g. -scatter- or -line-).
>>
>> distplot Var_1 Var_2 Var_3
>>
>> I have the following problem: I want to see the CDFs only for some
>> values of the variables i.e. for
>> Var_1<=.5 & Var_1>=.1 & Var_2<=.5 & Var_2>=.1 & Var_3<=.5 & Var_3>=.1
>>
>> In other words, I want to see only an excerpt of the original plot.
>>
>> Using just the xscale option does not work, i.e. does not work:
>>
>> distplot Var_1 Var_2 Var_3  xsc(r(0.1,.5)) xlabel(0.10 0.25 0.30 0.33 0.50)
>>
>> Restricting the data is not what I want, i.e.
>>
>> distplot Var_1 Var_2 Var_3 if Var_1<=.5 & Var_1>=.1 & Var_2<=.5 &
>> Var_2>=.1 & Var_3<=.5 & Var_3>=.1, xsc(r(0.1,.5)) xlabel(0.10 0.25
>> 0.30 0.33 0.50)
>>
>> would plot the distribution for certain values of Var_1, Var_2 and
>> Var_3. In contrast, I would like to plot the distribution for all
>> values but see only part of the distribution. Any ideas how to achieve
>> this?
>>
>> Best,
>> R
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