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Least Squares Fitting : CS 215
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| data=evstr(read_csv("~/cs215/session_22_07/data.txt")) | |
| X=data(:, 1:2); | |
| X=[ones(size(X, 1), 1) X]; | |
| y=data(:, 3); | |
| W = inv(X' * X) * X' * y; | |
| predictions = X * W; | |
| plot(predictions, 'r'); | |
| plot(y, 'g'); | |
| legend(["Predictions"; "True Value"]); | |
| title("Linear Regression") |
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| 2104,3,399900 | |
| 1600,3,329900 | |
| 2400,3,369000 | |
| 1416,2,232000 | |
| 3000,4,539900 | |
| 1985,4,299900 | |
| 1534,3,314900 | |
| 1427,3,198999 | |
| 1380,3,212000 | |
| 1494,3,242500 | |
| 1940,4,239999 | |
| 2000,3,347000 | |
| 1890,3,329999 | |
| 4478,5,699900 | |
| 1268,3,259900 | |
| 2300,4,449900 | |
| 1320,2,299900 | |
| 1236,3,199900 | |
| 2609,4,499998 | |
| 3031,4,599000 | |
| 1767,3,252900 | |
| 1888,2,255000 | |
| 1604,3,242900 | |
| 1962,4,259900 | |
| 3890,3,573900 | |
| 1100,3,249900 | |
| 1458,3,464500 | |
| 2526,3,469000 | |
| 2200,3,475000 | |
| 2637,3,299900 | |
| 1839,2,349900 | |
| 1000,1,169900 | |
| 2040,4,314900 | |
| 3137,3,579900 | |
| 1811,4,285900 | |
| 1437,3,249900 | |
| 1239,3,229900 | |
| 2132,4,345000 | |
| 4215,4,549000 | |
| 2162,4,287000 | |
| 1664,2,368500 | |
| 2238,3,329900 | |
| 2567,4,314000 | |
| 1200,3,299000 | |
| 852,2,179900 | |
| 1852,4,299900 | |
| 1203,3,239500 |
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