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bassbone
2021-06-11 23:14:29 +09:00
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100_Numpy_exercises_with_hints.md
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@@ -58,7 +58,7 @@ np.nan in set([np.nan])
`hint: np.diag`
#### 19. Create a 8x8 matrix and fill it with a checkerboard pattern (★☆☆)
`hint: array[::2]`
#### 20. Consider a (6,7,8) shape array, what is the index (x,y,z) of the 100th element?
#### 20. Consider a (6,7,8) shape array, what is the index (x,y,z) of the 100th element? (★☆☆)
`hint: np.unravel_index`
#### 21. Create a checkerboard 8x8 matrix using the tile function (★☆☆)
`hint: np.tile`
@@ -89,7 +89,7 @@ Z/1/1
Z<Z>Z
```
`No hints provided...`
#### 28. What are the result of the following expressions?
#### 28. What are the result of the following expressions? (★☆☆)
```python
np.array(0) / np.array(0)
np.array(0) // np.array(0)
@@ -135,7 +135,7 @@ np.sqrt(-1) == np.emath.sqrt(-1)
`hint: argmax`
#### 46. Create a structured array with `x` and `y` coordinates covering the [0,1]x[0,1] area (★★☆)
`hint: np.meshgrid`
#### 47. Given two arrays, X and Y, construct the Cauchy matrix C (Cij =1/(xi - yj))
#### 47. Given two arrays, X and Y, construct the Cauchy matrix C (Cij =1/(xi - yj)) (★★☆)
`hint: np.subtract.outer`
#### 48. Print the minimum and maximum representable value for each numpy scalar type (★★☆)
`hint: np.iinfo, np.finfo, eps`