Issue #15 Approximate Hessians. By default these are not implemented, and are the same as J and Jt

2026-08-18 12:30:39 +08:00 · 2013-11-04 09:53:38 -08:00
parent 224b0cea9e
commit 56bacc4a27
2 changed files with 30 additions and 2 deletions
@@ -150,10 +150,38 @@ class Problem(object):
            :rtype: numpy.array
            :return: JTv

-            Transpose of J
+            Effect of transpose of J on a vector v.
        """
        pass

+
+    def J_approx(self, m, v, u=None):
+        """
+
+            :param numpy.array m: model
+            :param numpy.array v: vector to multiply
+            :param numpy.array u: fields
+            :rtype: numpy.array
+            :return: Jv
+
+            Approximate effect of J on a vector v
+
+        """
+        return self.J(m, v, u)
+
+    def Jt_approx(self, m, v, u=None):
+        """
+            :param numpy.array m: model
+            :param numpy.array v: vector to multiply
+            :param numpy.array u: fields
+            :rtype: numpy.array
+            :return: JTv
+
+            Approximate transpose of J*v
+
+        """
+        return self.Jt(m, v, u)
+
    def field(self, m):
        """
            The field given the model.