[R-sig-Geo] Variable importance bar plot

[Enoch Gyamfi Ampadu]

Hi Sarah,

Thank you for getting in touch and providing a suggestion.  I have checked
but that is not what want actually.

 I want to have a vertical bar plot depicting how each variable contrite to
predicting the class. I used 8 bands of landsat image. So let's say if one
of the  land cover class to be Built up, I want to have bar plots in
ranking order of the bands to enable me compare their importance in
predicting the land cover class. I don't know if this explains what I want
better.

Thank you.

Best regards,

Enoch

Enoch Gyamfi - Ampadu

email: egampadu using gmail.com
skype: enoch.ampadu

The highest sense of nobility is self control.

A simple act of kindness creates endless ripple


On Tue, 29 Oct 2019, 16:51 Sarah Goslee, <sarah.goslee using gmail.com> wrote:

> It's not entirely clear to me how you expect the values to be
> calculated, but you might look at partial dependence plots, for
> example as implemented in the pdp package.
>
> Sarah
>
> On Sun, Oct 27, 2019 at 6:00 AM Enoch Gyamfi Ampadu <egampadu using gmail.com>
> wrote:
> >
> > Dear List,
> >
> > I hope this finds you well. Please I have done a Land cover
> classification
> > using randomForest. I used selected satellite image bands as input
> > variables. I have four thematic classes. I obtained the general variable
> > importance using *varImpPlot (my model) . *Now I want to have bar chart
> > plot showing each thematic class and the variable importance for each
> > class. That is, how each band is ranked in predicting a thematic class. I
> > tried using this function:
> >
> > *importance = varImp(my model, scale= TRUE)*
> >
> > *plot (importance. *
> >
> > However it did not work. I tried to put in *geom= "bar*". And I had
> error.
> >
> > Please I will be glad to get some assistance.
> >
> > Thank you.
> >
> > Best regards,
> >
> > Enoch
> >
>
>
> --
> Sarah Goslee (she/her)
> http://www.numberwright.com
>

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