[R] Antwort: Re: Way to Plot Multiple Variables and Change Color

[G.Maubach at weinwolf.de]

Hi Richard,

many thanks for your reply.

Your solution is not exactly what I was looking for. I would like to know 
how I can change the colors of the stacked bars in my plot and not use the 
default values. How can this be done?

Kind regards

Georg




Von:    "Richard M. Heiberger" <rmh at temple.edu>
An:     G.Maubach at weinwolf.de, 
Kopie:  r-help <r-help at r-project.org>
Datum:  28.03.2017 17:40
Betreff:        Re: [R] Way to Plot Multiple Variables and Change Color



I think you are looking for the likert function in the HH package.
>From ?likert


Diverging stacked barcharts for Likert, semantic differential, rating
scale data, and population pyramids.


This will get you started.  Much more fine control is available.  See
the examples and demo.

## install.packages("HH") ## if not yet on your system.

library(HH)

AA <- dfr[,-9]

labels <- sort(unique(as.vector(data.matrix(AA))))
result.template <- integer(length(labels))
names(result.template) <- labels

BB <- apply(AA, 2, function(x, result=result.template) {
  tx <- table(x)
  result[names(tx)] <- tx
  result
}
)

BB

likert(t(BB), ReferenceZero=0, horizontal=FALSE)


On Tue, Mar 28, 2017 at 6:05 AM,  <G.Maubach at weinwolf.de> wrote:
> Hi All,
>
> in my current project I have to plot a whole bunch of related variables
> (item batteries, e.g. How do you rate ... a) Accelaration, b) Horse 
Power,
> c) Color Palette, etc.) which are all rated on a scale from 1 .. 4.
>
> I need to present the results as stacked bar charts where the variables
> are columns and the percentages of the scales values (1 .. 4) are the
> chunks of the stacked bar for each variable. To do this I have 
transformed
> my data from wide to long and calculated the percentage for each 
variable
> and value. The code for this is as follows:
>
> -- cut --
>
> dfr <- structure(
>   list(
>     v07_01 = c(3, 1, 1, 4, 3, 4, 4, 1, 3, 2, 2, 3,
>                4, 4, 4, 1, 1, 3, 3, 4),
>     v07_02 = c(1, 2, 1, 1, 2, 1, 4, 1, 1,
>                4, 4, 1, 4, 4, 1, 3, 2, 3, 3, 1),
>     v07_03 = c(3, 2, 2, 1, 4, 1,
>                2, 3, 3, 1, 4, 2, 3, 1, 4, 1, 4, 2, 2, 3),
>     v07_04 = c(3, 1, 1,
>                4, 2, 4, 4, 2, 2, 2, 4, 1, 2, 1, 3, 1, 2, 4, 1, 4),
>     v07_05 = c(1,
>                2, 2, 2, 4, 4, 1, 1, 4, 4, 2, 1, 2, 1, 4, 1, 2, 4, 1, 4),
>     v07_06 = c(1,
>                2, 1, 2, 1, 1, 3, 4, 3, 2, 2, 3, 3, 2, 4, 2, 3, 1, 4, 3),
>     v07_07 = c(3,
>                2, 3, 3, 1, 1, 3, 3, 4, 4, 1, 3, 1, 3, 2, 4, 1, 2, 3, 4),
>     v07_08 = c(3,
>                2, 1, 2, 2, 2, 3, 3, 4, 4, 1, 1, 1, 2, 3, 1, 4, 2, 2, 4),
>     cased_id = structure(
>       1:20,
>       .Label = c(
>         "1",
>         "2",
>         "3",
>         "4",
>         "5",
>         "6",
>         "7",
>         "8",
>         "9",
>         "10",
>         "11",
>         "12",
>         "13",
>         "14",
>         "15",
>         "16",
>         "17",
>         "18",
>         "19",
>         "20"
>       ),
>       class = "factor"
>     )
>   ),
>   .Names = c(
>     "v07_01",
>     "v07_02",
>     "v07_03",
>     "v07_04",
>     "v07_05",
>     "v07_06",
>     "v07_07",
>     "v07_08",
>     "cased_id"
>   ),
>   row.names = c(NA, -20L),
>   class = c("tbl_df", "tbl",
>             "data.frame")
> )
>
> mdf <- melt(df)
> d_result <- mdf  %>%
>   dplyr::group_by(variable) %>%
>   count(value)
>
> ggplot(
>   d_result,
>   aes(variable, y = n, fill = value)) +
>   geom_bar(stat = "identity") +
>   coord_cartesian(ylim = c(0,100))
>
> -- cut --
>
> Is there an easier way of doing this, i. e. a way without need to
> transform the data?
>
> How can I change the colors for the data points 1 .. 4?
>
> I tried
>
> -- cut --
>
>   d_result,
>   aes(variable, y = n, fill = value)) +
>   geom_bar(stat = "identity") +
>   coord_cartesian(ylim = c(0,100)) +
>   scale_fill_manual(values = RColorBrewer::brewer.pal(4, "Blues"))
>
> -- cut -
>
> but this does not work cause I am mixing continuous and descrete values.
>
> How can I change the colors for the bars?
>
> Kind regards
>
> Georg
>
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