| author | anand |
| Thu, 11 Nov 2010 02:04:08 +0530 | |
| changeset 476 | cb587df417bd |
| parent 330 | efb8ddf26aff |
| permissions | -rw-r--r-- |
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Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
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changeset
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Objective Questions |
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6c203780bfbe
Converted lstsq to new template form
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parents:
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6c203780bfbe
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parents:
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changeset
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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1. What does ones_like([1, 2, 3]) produce |
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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a. array([1, 1, 1]) |
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6c203780bfbe
Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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#. [1, 1, 1] |
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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#. [1.0, 1.0, 1.0] |
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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#. Error |
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parents:
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changeset
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| 330 | 11 |
Answer: array([1, 1, 1]) |
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6c203780bfbe
Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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2. What does ones_like([1.2, 3, 4, 5]) produce |
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6c203780bfbe
Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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a. [1.2, 3, 4, 5] |
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6c203780bfbe
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Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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#. array([1.0, 1.0, 1.0, 1.0]) |
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6c203780bfbe
Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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#. array([1, 1, 1, 1]) |
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6c203780bfbe
Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
diff
changeset
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#. array([1.2, 3, 4, 5]) |
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6c203780bfbe
Converted lstsq to new template form
Nishanth <nishanth@fossee.in>
parents:
diff
changeset
|
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Answer: array([1.0, 1.0, 1.0, 1.0]) |
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parents:
diff
changeset
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3. The plot of ``u`` vs ``v`` is a bunch of scattered points that show a |
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linear trend. How do you find the least square fit line of ``u`` vs ``v``. |
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Answer:: |
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A = array(u, ones_like(u)).T |
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result = lstsq(A, v) |
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m, c = result[0] |
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lst_line = m * u + c |
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