Update Ex6.Rmd

[jutglar]

updated the classification

[ld162]

Hey @jutglar ,
we did upload a version with a continous scale yesterday to the master branch. If you want to replace it with yours please fix the warnings @zoeschindler pointed out before. I personally think it isn't necessary to change anything. Have a nice weekend :)

[toensing]

With the new classification the maps are more congruent and meaningful. Thank you Karuna.

[toensing]

I prefer the new version, because in the old version negative temperature are red and positive green, which is contraituitive. Furthermore with the classes it is more accurate.

[zoeschindler]

I tested the code and it runs. :)