# Trying to add kernels for Gaussian Process

**URL:** <https://discourse.julialang.org/t/trying-to-add-kernels-for-gaussian-process/78117>\
**Category:** Performance\
**Created:** [March 19, 2022, 1:54am UTC](https://discourse.julialang.org/t/trying-to-add-kernels-for-gaussian-process/78117 "2022-03-19T01:54:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mirror63](https://avatars.discourse-cdn.com/v4/letter/m/7ba0ec/32.png) [@mirror63](https://discourse.julialang.org/u/mirror63)\
**Post date:** [March 19, 2022, 1:54am UTC](https://discourse.julialang.org/t/trying-to-add-kernels-for-gaussian-process/78117/1 "2022-03-19T01:54:40Z")

</div>

I want to add two kernels for my Gaussian Process, I am using GaussianProcesses.jl . Can somebody give me an example of adding two kernels for a GP.

The two kernels I am trying to add are:  
Periodic + Noise

```julia
using GaussianProcesses
using Random

Random.seed!(20140430)
# Training data
n=10; #number of training points
x = 2π * rand(n); #predictors
y = sin.(x) + 0.05*randn(n); 

mZero = MeanZero()            
kern1 = Periodic(1.0, 1.0, 1.5, [1.5: 10])      
kern2 = Noise(0.01)
kern = kern1+k2           
gp = GP(x,y,mZero, kern, 0)     

```

Edit: I have figured out the issue: In kern1 = Periodic(1.0, 1.0, 1.5, [1.5: 10]), the parameters setup was wrong, however, can somebody help, for Periodic Kernel the parameters that I want to setup is: `ll::Real` : length scale = 1.0, `lσ::Real` = 1.0 and `lp::Real` : periodicity parameter, for a range from 1.5 to 10.0