Is there a way to interactively drag points in a scatterplot created bu shiny ?

[Grégoire Vincke]

Hi everybody,

Do you know if it is possible to create with shiny an app quite close to this one, build in Flash several years ago, and allowing to drag points in a scatterplot and view consequencies to all parameters of a linear regression ?

http://sites.uclouvain.be/selt/ressources/104013 (in french)

We want all the points to be dragables with the mouse. Computation of all parameters must not be synchronus, but synchronicity is a plus.

I do not search someone to build it, but just to know if you think it is possible, and how (libraries, javascript tips, etc).

Thanks a lot for your advises.

Grégoire

[John Harrison]

Hi Gregoire,

Thats a really nice app. I think you could do something similar in shiny. You could start with the jqplot javascript library.
I have thrown together a quick example based on one of the jqplot examples at:

http://spark.rstudio.com/johnharrison/draggable/

John

[Stéphane Laurent]

Hello John, 

Your app appears "frozen" for me. I'm using Chrome and Windows XP.

[John Harrison]

Hi Stephane,

It should be working now. I was adjusting the example to depend on the input and also to more closely match the OP's app in spirit.

John

[John Harrison]

The code to run this example can be found at: https://gist.github.com/johndharrison/7092047

You would need to have the jqPlot library found at http://www.jqplot.com/deploy/download/jquery.jqplot.1.0.4r1121.zip for example. I placed the contents of this file
in www and linked to them in the ui.R

[Vincke Grégoire]

Hi John,

Brilliant !!

Thanks a lot for this illustrated example which fits exactly what i
expected. This will be a very good base to extend this app to reach our
didactic goal.

Now i know that i can start to investigate shiny more closely to build
this kind of apps.

Future goals of this app :
* change the regression model from linear to exponential, power,
logarithm, etc
* draw interval of confidence of regression
* last but not least : add points by clicking directly on the graph

I will let a message on this list when it's done.

Have a nice day !

Gr�goire





Le 21/10/2013 21:21, John Harrison a �crit :

> Hi Gregoire,
>
> Thats a really nice app. I think you could do something similar in
> shiny. You could start with the jqplot javascript library.
> I have thrown together a quick example based on one of the jqplot
> examples at:
>
> http://spark.rstudio.com/johnharrison/draggable/
>
> John

> On Monday, October 21, 2013 9:43:05 PM UTC+7, Gr�goire Vincke wrote:
>
> Hi everybody,
>
> Do you know if it is possible to create with shiny an app quite
> close to this one, build in Flash several years ago, and allowing to
> drag points in a scatterplot and view consequencies to all
> parameters of a linear regression ?
>
> http://sites.uclouvain.be/selt/ressources/104013
> <http://sites.uclouvain.be/selt/ressources/104013> (in french)
>
> We want all the points to be dragables with the mouse. Computation
> of all parameters must not be synchronus, but synchronicity is a plus.
>
> I do not search someone to build it, but just to know if you think
> it is possible, and how (libraries, javascript tips, etc).
>
> Thanks a lot for your advises.
>

> Gr�goire
>
>
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[Stéphane Laurent]

Yes it works now. Very nice. 

But if we move a point in the javascript graphic, can we get its new coordinates in R ?

Actually I'd like to be able to remove a point from the sample, in order to see its influence on the fitted regression model.

[Stéphane Laurent]

I'm not sure it fits your expectation because the regression line is calculated by the javascript code, not by R, isnt'it ?

[Vincke Grégoire]

Hi St�phane, John

As soon as i just start to analyse the code, i would say yes.

The all graph seems to be genereted by javascript instead of R, which in
fact reduce the future possibilities of interaction with R.

I will pay attention to that and will search a way to have the benefit
of the both frameworks.

St�phane, thanks for notice.

John, do you know if it's possible to maybe use this javascript as a
layer over an R genereted program, and if it's possible to store the
coordinates of each point to feed R with them ?

Thanks.

Gr�goire







Le 22/10/2013 09:55, St�phane Laurent a �crit :

> I'm not sure it fits your expectation because the regression line is
> calculated by the javascript code, not by R, isnt'it ?
>
>

> Le mardi 22 octobre 2013 09:40:37 UTC+2, Gr�goire Vincke a �crit :

>
> Hi John,
>
> Brilliant !!
>
> Thanks a lot for this illustrated example which fits exactly what i
> expected.
>

[Kirill Savin]

Definitely doable. You may want to check this tutorial and this topic.

On Tuesday, October 22, 2013 4:11:56 AM UTC-4, Grégoire Vincke wrote:

Hi St�phane, John

As soon as i just start to analyse the code, i would say yes.

The all graph seems to be genereted by javascript instead of R, which in
fact reduce the future possibilities of interaction with R.

I will pay attention to that and will search a way to have the benefit
of the both frameworks.

St�phane, thanks for notice.

John, do you know if it's possible to maybe use this javascript as a
layer over an R genereted program, and if it's possible to store the
coordinates of each point to feed R with them ?

Thanks.

Gr�goire







Le 22/10/2013 09:55, St�phane Laurent a �crit :

> I'm not sure it fits your expectation because the regression line is
> calculated by the javascript code, not by R, isnt'it ?
>
>

> Le mardi 22 octobre 2013 09:40:37 UTC+2, Gr�goire Vincke a �crit :

[John Harrison]

The key  thing here is that you can drag the points. Once the points are dragged a javascript event is fired and you can recover the new coordinates. You can use these new coordinates at any time to
draw whatever graph you would like. I just used the build in javascript trendline as a prove of concept. It would be pretty straightforward to extend the example. If I get some time I will extend the example so R is providing the trendline and also the varioys fitted values etc.

John

[Vivian Chen]

Hi John,

I searched and found your post on doing interactive plots with shiny. I've downloaded your script but somehow it doesn't run for me. I can only get the sidepanel on the UI but not the main. Would you share some lights here?

Thanks,
Viv