readme: added multi1d example solved with EGO + qEI

Author: jviquerat

README.md

@@ -42,6 +42,7 @@ spk --train <json_file>
 | `parabola`   | 2                 | Classic parabola (solved with `PBO`)                                   | <img width="300" alt="gif" src="sparkle/msc/parabola_pbo.gif">     |
 | `rosenbrock` | 2                 | Rosenbrock function (solved with `CMAES`)                              | <img width="300" alt="gif" src="sparkle/msc/rosenbrock_cmaes.gif"> |
 | `multi1d`    | 1                 | Multi1D function (solved with `EGO`)                                   | <img width="300" alt="gif" src="sparkle/msc/multi1d_ego.gif">      |
+| `qEI`        | 2                 | Multi1D function with parallel sampling (solved with `EGO` + `qEI`)    | <img width="300" alt="gif" src="sparkle/msc/multi1d_ego_qei.gif">  |
 | `constraint` | 2                 | Parabola with a priori constraints on parameters (solved with `CMAES`) | <img width="300" alt="gif" src="sparkle/msc/constraint_cmaes.gif"> |
 
 ## Physics-based environments

sparkle/env/multi1d/ego_qei.json

@@ -0,0 +1,35 @@
+{
+    "n_avg": 1,
+    "avg_type": "linear",
+    "naming": {
+        "env": true,
+        "agent": true,
+        "tag": false,
+        "time": false
+    },
+    "trainer": {
+        "name": "metamodel",
+        "render_every": 1,
+        "renderer": "trainer",
+        "environment": {
+            "name": "multi1d"
+        },
+        "pex": {
+            "name": "minrfps",
+            "n_points": 2
+        },
+        "model": {
+            "name": "kriging",
+            "optimize_every": 10,
+            "kernel": {
+                "name": "matern52"
+            }
+        },
+        "agent": {
+            "name": "ego",
+            "n_points": 2,
+            "n_steps_max": 20,
+            "infill": "q_ei"
+        }
+    }
+}