Merge 78b0cc0 into 2e2937a

docs/src/LinearSurrogate.md

@@ -1,15 +1,13 @@
 ## Linear Surrogate
-Linear Surrogate is a linear approach to modeling the relationship between a scalar response or dependent variable and one or more explanatory variables. We will use Linear Surrogate to optimize **Eggholder Function**:
+Linear Surrogate is a linear approach to modeling the relationship between a scalar response or dependent variable and one or more explanatory variables. We will use Linear Surrogate to optimize **Eggholder Function** [function](http://infinity77.net/global_optimization/test_functions.html#test-functions-index.):
 
-f_{\text{EggHolder}}(\mathbf{x}) = - x_{1} \sin\left(\sqrt{\lvert{x_{1} - x_{2} -47}\rvert}\right) - \left(x_{2} + 47\right) \sin\left(\sqrt{\left|{\frac{1}{2} x_{1} + x_{2} + 47}\right|}\right)
-
-[function from](http://infinity77.net/global_optimization/test_functions.html#test-functions-index.)
+$f(x) = - x_{1} \sin\left(\sqrt{\lvert{x_{1} - x_{2} -47}\rvert}\right) - \left(x_{2} + 47\right) \sin\left(\sqrt{\left|{\frac{1}{2} x_{1} + x_{2} + 47}\right|}\right)$.
 
 First of all we have to import these two packages: `Surrogates` and `Plots`.
 
 ```@example linear_surrogate1D
-using Surrogates, Plots
-default()
+using Surrogates
+using Plots
 ```
 
 ### Sampling