mid=[] beat=[] for i in range(len(_r_peaks)): mid[i]=(_r_peaks[i] + _r_peaks[i+1]) / 2 for i in range(len(mid)): beat[i] = _ecg_voltage[mid[i]:mid[i+1]] for i in range(len(beat)): print('beat[{}] ='.format(i), beat[i]) print('\n')报错Traceback (most recent call last): File "D:\pythonProject\main.py", line 73, in <module> mid[i]=(_r_peaks[i-1] + _r_peaks[i]) / 2 IndexError: list assignment index out of range
时间: 2023-12-03 09:46:14 浏览: 24
这个错误是由于您的mid和beat列表没有初始化而导致的,您需要在使用前先将它们初始化。可以使用以下代码来初始化mid和beat:
```
num_beats = len(_r_peaks) - 1
mid = [0]*num_beats
beat = [0]*num_beats
```
这里假设_r_peaks列表中有多个心跳峰值,因此心跳数量为len(_r_peaks)-1。初始化mid和beat时,需要指定列表的长度,即num_beats。然后,将mid和beat列表中的每个元素初始化为0。
接下来,您可以使用以下代码来计算mid和beat:
```
for i in range(num_beats):
mid[i] = int((_r_peaks[i] + _r_peaks[i+1]) / 2)
for i in range(num_beats):
beat[i] = _ecg_voltage[mid[i]:mid[i+1]]
for i in range(num_beats):
print('beat[{}] ='.format(i), beat[i])
print('\n')
```
请注意,这里使用了int函数来将mid列表中的元素转换为整数,因为列表索引必须是整数。
相关问题
Traceback (most recent call last): File "D:\pythonProject\main.py", line 73, in <module> mid[i]=(_r_peaks[i] + _r_peaks[i+1]) / 2 IndexError: list assignment index out of range怎么改
这个错误通常是由于您正在尝试访问列表中不存在的索引导致的。在这种情况下,您尝试对一个空列表进行索引。
要解决此问题,请确保列表中至少有两个元素。您可以添加一个条件来检查列表长度是否大于1,例如:
```python
if len(_r_peaks) > 1:
for i in range(len(_r_peaks)-1):
mid[i] = (_r_peaks[i] + _r_peaks[i+1]) / 2
```
这将仅在列表长度大于1时执行循环,从而避免了索引错误。另外,您也可以考虑在循环之前使用append方法向列表中添加元素,以确保列表中至少有两个元素。
normalized_beat_2d[i] = np.zeros((len(normalized_beat[i]), 2)) normalized_beat_2d[i, 0] = normalized_beat[i] normalized_beat_2d[i, 1] = (i / (len(normalized_beat[i]) - 1)) * 2 - 1 mtf = MarkovTransitionField() image[i] = mtf.transform(normalized_beat_2d[i]) print('normalized_beat_2d[{}] ='.format(i), normalized_beat_2d[i]) print('len(normalized_beat_2d[{}]) ='.format(i), len(normalized_beat_2d[i]))报错Traceback (most recent call last): File "D:\pythonProject_ecg_analyzation\main.py", line 22, in <module> GetBeats.getbeats(r_peaks, ecg_voltage, user_number) File "D:\pythonProject_ecg_analyzation\GetBeats.py", line 53, in getbeats normalized_beat_2d[i, 0] = normalized_beat[i] TypeError: list indices must be integers or slices, not tuple怎么改
这个错误是因为 `normalized_beat_2d` 是一个列表,而在赋值时使用了类似于数组的方式进行索引。需要将 `normalized_beat_2d` 改为一个 NumPy 数组,代码如下:
```
normalized_beat_2d = np.zeros((len(normalized_beat),), dtype=object)
for i in range(len(normalized_beat)):
normalized_beat_2d[i] = np.zeros((len(normalized_beat[i]), 2))
normalized_beat_2d[i][:, 0] = normalized_beat[i]
normalized_beat_2d[i][:, 1] = (i / (len(normalized_beat[i]) - 1)) * 2 - 1
mtf = MarkovTransitionField()
image[i] = mtf.transform(normalized_beat_2d[i])
print('normalized_beat_2d[{}] ='.format(i), normalized_beat_2d[i])
print('len(normalized_beat_2d[{}]) ='.format(i), len(normalized_beat_2d[i]))
```
这里使用了一个大小为 `len(normalized_beat)` 的对象数组 `normalized_beat_2d`,然后在遍历 `normalized_beat` 的过程中,为每个元素赋值一个大小为 `(len(normalized_beat[i]), 2)` 的 NumPy 数组。对这个 NumPy 数组进行赋值时,可以使用 `[:, 0]` 和 `[:, 1]` 分别取出第一列和第二列的值。