Fix a typo in nnls_tutorial.rst.
Thanks to Avi Ginsburg for reporting this.
Change-Id: I86a9d1768798d541c82f46e6a1c21cb2474c880a
diff --git a/docs/source/nnls_tutorial.rst b/docs/source/nnls_tutorial.rst
index bede3c5..5125d35 100644
--- a/docs/source/nnls_tutorial.rst
+++ b/docs/source/nnls_tutorial.rst
@@ -344,7 +344,7 @@
};
-Similarly, we can define classes ``F1``, ``F2`` and ``F4`` to evaluate
+Similarly, we can define classes ``F1``, ``F2`` and ``F3`` to evaluate
:math:`f_1(x_1, x_2)`, :math:`f_2(x_3, x_4)` and :math:`f_3(x_2, x_3)`
respectively. Using these, the problem can be constructed as follows:
