Custom colorbar range

Plotly R, MATLAB, Julia, Net Plotly R
1

How to set custom colorbar range from -40 to 40, even though the values are in smaller range?

Capture.PNG596×520 49.4 KB

2

if someone will need, just put
colorscale = list(c(0, “rgb(255, 0, 0)”), list(1, “rgb(0, 255, 0)”)),
cauto = F,
cmin = -40,
cmax = 40

1 Like
3

colorscale = list(c(0, “rgb(255, 0, 0)”), list(1, “rgb(0, 255, 0)”)) dosn’t change colors, why?

4

attach your code, otherwise it is hard to say

5

Dear Alex, here it is:

plot_ly(z = volcano,
surfacecolor = matrix(nrow = volcano, ncol = volcano, runif(80)),
type = “surface”,
showscale = T,
colorscale = list(c(0, “rgb(255, 0, 0)”), list(1, “rgb(0, 255, 0)”)),
cauto = F,
cmin = 0,
cmax = 1)

Thank you in advance!

6

For me it works like a charm. What exactly doesn’t work? Try to update plotly library. If it doesn’t work, send your session info and snapshot of resulting surface

plotcolor.png1590×791 219 KB

7

Here it is… Thank you for advice, I’ll try with the library update…

newplot.png1840×875 284 KB

8

I’ve uninstalled R and RStudio, installed R 3.3.1, RStudio 0.99.903 and only plotly package (install_github(“ropensci/plotly”)) but the problem remains… I use Windows 7.

9

Actually, if I change colorcale to any of default, such as ‘Blues’ or ‘Earth’, it displays only Bluered:

plot_ly(z = volcano,
surfacecolor = matrix(nrow = volcano, ncol = volcano, runif(80)),
type = “surface”,
showscale = T,
colorscale = “Blues”,
# colorscale = list(c(0, “rgb(255, 0, 0”), list(1, “rgb(0, 255, 0)”)),
cauto = F,
cmin = 0,
cmax = 1
)

primer1.png765×300 53.7 KB

10

May you then run

p = plot_ly(z = volcano,
surfacecolor = matrix(nrow = volcano, ncol = volcano, runif(80)),
type = “surface”,
showscale = T,
colorscale = list(c(0, “rgb(255, 0, 0)”), list(1, “rgb(0, 255, 0)”)),
cauto = F,
cmin = 0,
cmax = 1)

bld = plotly_build§

str(bld)

And show the output of last command( “str(bld)” )

11

List of 8
$ x :List of 5
…$ layout :List of 1
… …$ margin:List of 4
… … …$ b: num 40
… … …$ l: num 60
… … …$ t: num 25
… … …$ r: num 10
…$ config :List of 1
… …$ modeBarButtonsToRemove:Class ‘AsIs’ chr “sendDataToCloud”
…$ base_url: chr “https://plot.ly”
…$ source : chr “A”
…$ data :List of 1
… …$ :List of 9
… … …$ colorbar :List of 2
… … … …$ title : chr “”
… … … …$ ticklen: num 2
… … …$ colorscale :‘data.frame’: 2 obs. of 3 variables:
… … … …$ : Factor w/ 2 levels “0”,“rgb(255, 0, 0)”: 1 2
… … … …$ : num [1:2] 1 1
… … … …$ : Factor w/ 1 level “rgb(0, 255, 0)”: 1 1
… … …$ showscale : logi TRUE
… … …$ z : num [1:87, 1:61] 100 101 102 103 104 105 105 106 107 108 …
… … …$ surfacecolor: num [1:100, 1:100] 0.789 0.934 0.617 0.832 0.34 …
… … …$ cauto : logi FALSE
… … …$ cmin : num 0
… … …$ cmax : num 1
… … …$ type : chr “surface”
…- attr(*, “TOJSON_FUNC”)=function (x, …)
$ width : NULL
$ height : NULL
$ sizingPolicy :List of 6
…$ defaultWidth : chr “100%”
…$ defaultHeight: num 400
…$ padding : NULL
…$ viewer :List of 6
… …$ defaultWidth : NULL
… …$ defaultHeight: NULL
… …$ padding : NULL
… …$ fill : logi TRUE
… …$ suppress : logi FALSE
… …$ paneHeight : NULL
…$ browser :List of 4
… …$ defaultWidth : NULL
… …$ defaultHeight: NULL
… …$ padding : NULL
… …$ fill : logi TRUE
…$ knitr :List of 3
… …$ defaultWidth : NULL
… …$ defaultHeight: NULL
… …$ figure : logi TRUE
$ dependencies : NULL
$ elementId : NULL
$ preRenderHook:function §
$ jsHooks : list()

  • attr(*, “class”)= chr [1:2] “plotly” “htmlwidget”
  • attr(*, “package”)= chr “plotly”
12

Ok, then what I would do. Remove both plotly and htmlwidgets packages. and reinstall them again. However, use plotly 3.4.13 from https://cran.r-project.org/src/contrib/Archive/plotly/ and htmlwidgets_0.6 from https://cran.r-project.org/src/contrib/Archive/htmlwidgets/

1 Like
13

Dear Alex, that’s it! :slight_smile: Thank you, very, very much! All the best!