回答編集履歴
2
掛け算を追加
test
CHANGED
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@@ -83,3 +83,47 @@
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83
83
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>>>
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84
84
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85
85
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```
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86
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+
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87
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+
掛け算なら以下です。
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88
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+
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89
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+
```python
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90
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+
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91
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+
>>> import functools
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92
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+
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93
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+
>>> import operator
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94
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+
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95
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+
>>>
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96
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+
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97
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+
>>> print(df)
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98
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+
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99
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+
C1 C2 C3
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100
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+
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101
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+
0 24 24 31
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102
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+
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103
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+
1 18 38 24
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104
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+
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105
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+
2 19 11 15
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106
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+
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107
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+
3 35 18 21
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108
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+
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109
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+
>>>
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110
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+
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111
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+
>>> def pi_cn(df, column, n):
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112
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+
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113
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+
... return functools.reduce(operator.mul, df[column].values[:n], 1)
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114
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+
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115
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+
...
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116
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+
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117
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+
>>> print(pi_cn(df, 'C2', 2))
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118
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+
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119
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+
912
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120
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+
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121
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+
>>> print(pi_cn(df, 'C2', 3))
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122
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+
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123
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+
10032
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124
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+
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125
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+
>>> print(pi_cn(df, 'C2', 4))
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126
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+
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127
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+
180576
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128
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+
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129
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+
```
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1
任意の行数についての合計を追加
test
CHANGED
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@@ -37,3 +37,49 @@
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37
37
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>>>
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38
38
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39
39
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```
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40
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+
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41
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+
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42
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+
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43
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+
タイトルが「上から○段目」なのですね。
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44
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+
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45
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+
足し算なら以下です。
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46
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+
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47
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+
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48
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+
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49
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+
```python
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50
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+
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51
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+
>>> print(df)
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52
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+
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53
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+
C1 C2 C3
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54
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+
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55
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+
0 24 24 31
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56
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+
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57
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+
1 18 38 24
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58
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+
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59
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+
2 19 11 15
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60
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+
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61
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+
3 35 18 21
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62
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+
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63
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+
>>>
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64
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+
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65
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+
>>> def sum_cn(df, column, n):
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66
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+
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67
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+
... return sum(df[column].values[:n])
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68
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+
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69
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+
...
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70
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+
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71
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+
>>> print(sum_cn(df, 'C2', 2))
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72
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+
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73
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+
62
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74
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+
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75
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+
>>> print(sum_cn(df, 'C2', 3))
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76
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+
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77
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+
73
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78
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+
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79
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+
>>> print(sum_cn(df, 'C2', 4))
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80
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+
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81
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+
91
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82
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+
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83
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+
>>>
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84
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+
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85
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+
```
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