# Colormap logscale using Plot

I’m trying to build a 3D surface plot with color in log10 scale. I just want the color to be in the log10 scale NOT the actual values itself.

``````N = 51
x = range(-10, stop = 10, length = N)
y = x
f(x,y)=x^2+y^2
Plots.plot(x,y,f,st=:surface,color=:jet,camera=(25,65))
``````

See below: Here is the output with Logscale created using GNUPLOT.

Check out the documentation. It is pretty

2 Likes

Thank you. The link really helped.

I have used log scale, but still unable to reproduce the chart from `gnuplot`.

``````using Plots
N = 51
x = range(-10, stop = 10, length = N)
y = x
f(x,y)=x^2+y^2
savefig(out,"out.png")

``````

The key driving factor is `z` the need to included in `cgrad`. How would one modify `z` to get a replica of my original plot. I figured it out:

``````using Plots
N = 51
x = range(-10, stop = 10, length = N)
y = x
f(x,y)=x^2+y^2
z  = [0.001,0.01,0.05,5,50,100,200]
It would be great if we can automatically estimate values `z` like `gnuplot`. ``````z = 10 .^ (1:0.01:2)