--- a/lstsq/questions.rst Wed Nov 17 23:24:57 2010 +0530
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,32 +0,0 @@
-Objective Questions
--------------------
-
- 1. What does ones_like([1, 2, 3]) produce
-
- a. array([1, 1, 1])
- #. [1, 1, 1]
- #. [1.0, 1.0, 1.0]
- #. Error
-
- Answer: array([1, 1, 1])
-
- 2. What does ones_like([1.2, 3, 4, 5]) produce
-
- a. [1.2, 3, 4, 5]
- #. array([1.0, 1.0, 1.0, 1.0])
- #. array([1, 1, 1, 1])
- #. array([1.2, 3, 4, 5])
-
- Answer: array([1.0, 1.0, 1.0, 1.0])
-
- 3. The plot of ``u`` vs ``v`` is a bunch of scattered points that show a
- linear trend. How do you find the least square fit line of ``u`` vs ``v``.
-
- Answer::
-
- A = array(u, ones_like(u)).T
- result = lstsq(A, v)
- m, c = result[0]
-
- lst_line = m * u + c
-