61 lines
838 B
Markdown
61 lines
838 B
Markdown
---
|
|
id: 5e9a0a8e09c5df3cc3600eda
|
|
title: 加载数据和高级索引
|
|
challengeType: 11
|
|
videoId: tUdBZ7pF8Jg
|
|
bilibiliIds:
|
|
aid: 720524642
|
|
bvid: BV1xQ4y1r7mu
|
|
cid: 409027117
|
|
dashedName: loading-data-and-advanced-indexing
|
|
---
|
|
|
|
# --question--
|
|
|
|
## --text--
|
|
|
|
给定一个名为 `data.txt` 的文件，其中包含以下内容：
|
|
|
|
<pre>
|
|
29,97,32,100,45
|
|
15,88,5,75,22
|
|
</pre>
|
|
|
|
哪段代码会生成下面的数组？
|
|
|
|
```py
|
|
[29. 32. 45. 15. 5. 22.]
|
|
```
|
|
|
|
## --answers--
|
|
|
|
```py
|
|
filedata = np.genfromtxt('data.txt', delimiter=',')
|
|
output = np.any(filedata < 50)
|
|
|
|
print(output)
|
|
```
|
|
|
|
---
|
|
|
|
```py
|
|
filedata = np.genfromtxt('data.txt', delimiter=',')
|
|
output = np.all(filedata < 50, axis=1)
|
|
|
|
print(output)
|
|
```
|
|
|
|
---
|
|
|
|
```py
|
|
filedata = np.genfromtxt('data.txt', delimiter=',')
|
|
output = filedata[filedata < 50]
|
|
|
|
print(output)
|
|
```
|
|
|
|
## --video-solution--
|
|
|
|
3
|
|
|