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bassbone
2021-06-11 23:14:29 +09:00
parent 22f47a6e0b
commit 8603114b95
7 changed files with 229 additions and 229 deletions
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100_Numpy_exercises_with_solutions.md
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@@ -168,7 +168,7 @@ Z[1::2,::2] = 1
Z[::2,1::2] = 1
print(Z)
```
#### 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? (★☆☆)
```python
@@ -255,7 +255,7 @@ Z <- Z
Z/1/1
Z<Z>Z
```
#### 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)
@@ -447,7 +447,7 @@ Z['x'], Z['y'] = np.meshgrid(np.linspace(0,1,5),
np.linspace(0,1,5))
print(Z)
```
#### 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)) (★★☆)
```python
@@ -827,7 +827,7 @@ from numpy.lib import stride_tricks
def rolling(a, window):
shape = (a.size - window + 1, window)
strides = (a.itemsize, a.itemsize)
strides = (a.strides[0], a.strides[0])
return stride_tricks.as_strided(a, shape=shape, strides=strides)
Z = rolling(np.arange(10), 3)
print(Z)