Add sum model

pyproject.toml

@@ -155,7 +155,7 @@ target-version = [
     max-locals = 50
     max-branches = 30
     max-statements = 85
-    max-attributes = 25
+    max-attributes = 30
     max-public-methods = 80
 
 [tool.cibuildwheel]

src/gstools/__init__.py

@@ -54,6 +54,7 @@
 
 .. autosummary::
    CovModel
+   SumModel
 
 Covariance Models
 ^^^^^^^^^^^^^^^^^
@@ -62,6 +63,7 @@
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 .. autosummary::
+   Nugget
    Gaussian
    Exponential
    Matern
@@ -153,9 +155,11 @@
     JBessel,
     Linear,
     Matern,
+    Nugget,
     Rational,
     Spherical,
     Stable,
+    SumModel,
     SuperSpherical,
     TPLExponential,
     TPLGaussian,
@@ -198,6 +202,8 @@
 __all__ += ["transform", "normalizer", "config"]
 __all__ += [
     "CovModel",
+    "SumModel",
+    "Nugget",
     "Gaussian",
     "Exponential",
     "Matern",

src/gstools/covmodel/__init__.py

@@ -19,6 +19,7 @@
    :toctree:
 
    CovModel
+   SumModel
 
 Covariance Models
 ^^^^^^^^^^^^^^^^^
@@ -27,6 +28,7 @@
 .. autosummary::
    :toctree:
 
+   Nugget
    Gaussian
    Exponential
    Matern
@@ -53,7 +55,7 @@
    TPLSimple
 """
 
-from gstools.covmodel.base import CovModel
+from gstools.covmodel.base import CovModel, SumModel
 from gstools.covmodel.models import (
     Circular,
     Cubic,
@@ -64,6 +66,7 @@
     JBessel,
     Linear,
     Matern,
+    Nugget,
     Rational,
     Spherical,
     Stable,
@@ -78,6 +81,8 @@
 
 __all__ = [
     "CovModel",
+    "SumModel",
+    "Nugget",
     "Gaussian",
     "Exponential",
     "Matern",