A bit more info in the README

Author: KriFos1

README.md

@@ -1,2 +1,23 @@
 # Geostatistics
 Code containing various geostatistical tools that are useful for PET.
+
+## Installation
+Clone repository and install with pip:
+
+```sh
+pip install -e .
+```
+## Examples
+```python
+from geostat.decomp import Cholesky
+import numpy as np
+
+stat = Cholesky()
+nx = 3
+mean = np.array([1., 2., 3.])
+var = np.array([10., 20., 30.])
+ne = 2
+cov = stat.gen_cov2d(x_size=nx, y_size=1, variance=var,
+                                  var_range=1., aspect=1., angle=0., var_type='sph')
+sample = stat.gen_real(mean, cov, ne)
+```