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config/config_keys.toml

@@ -236,11 +236,11 @@ is_internal = [false]
 
 [LAMBDA]
 default = [0]
-value_type = ['int | double']
-value_format = ['N']
-value_N = [1]
-description = """This KEY controls the regularisation parameter :math:`\\lambda` for both :cpp:class:`M_BLR` and :cpp:class:`M_KRR`. If :code:`N=0`, no regularisation is applied. If :code:`N>0`, :math:`\\lambda` is set to this value. If :code:`N<0`, an evidence-approximation algorithm estimates the value of :math:`\\lambda`."""
-examples = ['LAMBDA -1', 'LAMBDA 1e-4']
+value_type = ['int | double | int double']
+value_format = ['N | N M']
+value_N = [-2]
+description = """This KEY controls the regularisation parameter :math:`\\lambda` for both :cpp:class:`M_BLR` and :cpp:class:`M_KRR`. If :code:`N=0`, no regularisation is applied. If :code:`N>0`, :math:`\\lambda` is set to this value. If :code:`N<0`, an evidence-approximation algorithm estimates the value of :math:`\\lambda`. For LAMBDA 0, second number, M (double), can be specified, i.e. LAMBDA 0 1e-12, which helps to determine the effective rank of matrix ::math:`\\Phi` (default 1e-8)."""
+examples = ['LAMBDA -1', 'LAMBDA 1e-4', 'LAMBDA 0', 'LAMBDA 0 1e-12']
 is_internal = [false]
 
 [ALPHA]