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Plot the average gdp over time, seperately (but on the same graph) for cities that started programs in each of the years from 1989 to
Plot the average gdp over time, seperately (but on the same graph) for cities that started programs in each of the years from 1989 to 1991. Please provide the answer with R codes.
| year | city | startyear | gdp |
| 1990 | 1 | 1989 | 265 |
| 1991 | 1 | 1989 | 266 |
| 1992 | 1 | 1989 | 275 |
| 1990 | 2 | 1989 | 266 |
| 1991 | 2 | 1989 | 422 |
| 1992 | 2 | 1989 | 526 |
| 1990 | 3 | 1990 | 332 |
| 1991 | 3 | 1990 | 520 |
| 1992 | 3 | 1990 | 225 |
| 1990 | 4 | 1991 | 652 |
| 1991 | 4 | 1991 | 366 |
| 1992 | 4 | 1991 | 991 |
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Exercises In Computational Mathematics With MATLAB
Authors: Tom Lyche, Jean Louis Merrien
1st Edition
366243511X, 9783662435113
