scatterのエラー解決

Question

内容

scatterを使って文字を書きたいのですが、上手くいきません

• 入力コード

import matplotlib.pyplot as plt

plt.scatter([20, 40], [20, 39], [20, 38], [20, 37], [20, 36], [20, 35], [20, 34], [20, 33], [20, 32], [20,31], [20, 30], [21, 40], [22, 40], [23, 40], [24, 40], [25, 40], [26, 40], [27, 40], [28, 40], [29, 40], [30, 40], [30, 39], [30, 38], [30, 37], [30, 36], [30, 35], [30, 34], [30, 33], [30, 32], [30, 31], [30, 30], [23, 39], [24, 38], [26, 38], [27, 39], [22, 38], [23, 38], [24, 38], [25, 38], [26, 38], [27, 38], [28, 38], [25, 38], [25, 37], [25, 36], [25, 35], [25, 34], [25, 33], [23, 34], [23, 33], [24, 33], [25, 33], [26, 33], [27, 33], c="black", marker="■")

plt.show()

• エラーコード

TypeError                                 Traceback (most recent call last)
<ipython-input-4-658f0ea7656e> in <module>()
----> 1 plt.scatter([20, 40], [20, 39], [20, 38], [20, 37], [20, 36], [20, 35], [20, 34], [20, 33], [20, 32], [20,31], [20, 30], [21, 40], [22, 40], [23, 40], [24, 40], [25, 40], [26, 40], [27, 40], [28, 40...
      2 plt.show()

TypeError: scatter() got multiple values for argument 'c'

利用環境

Google Colaboratoryを使っています。

最後

cの引数が複数あるということなのですが、この入力だとどの部分がダメなのか、自分では理解できません。具体的な原因と、できれば解消策を教えてください。

Answer 1

x, y座標値を適切に与えてください。

import matplotlib.pyplot as plt

l = [[20, 40], [20, 39], [20, 38], [20, 37], [20, 36], [20, 35], [20, 34], [20, 33], [20, 32], [20,31], [20, 30], [21, 40], [22, 40], [23, 40], [24, 40], [25, 40], [26, 40], [27, 40], [28, 40], [29, 40], [30, 40], [30, 39], [30, 38], [30, 37], [30, 36], [30, 35], [30, 34], [30, 33], [30, 32], [30, 31], [30, 30], [23, 39], [24, 38], [26, 38], [27, 39], [22, 38], [23, 38], [24, 38], [25, 38], [26, 38], [27, 38], [28, 38], [25, 38], [25, 37], [25, 36], [25, 35], [25, 34], [25, 33], [23, 34], [23, 33], [24, 33], [25, 33], [26, 33], [27, 33]]
x = [v[0] for v in l] # x座標のみ
y = [v[1] for v in l] # y座標のみ
plt.scatter( x, y, c="black", marker="*") # ■というマーカーはない

plt.show()

Comments

[874-3175-8...]

なるほど！勉強になりました。

Answer 2

plt.scatter([20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 23, 24, 26, 27, 22, 23, 24, 25, 26, 27, 28, 25, 25, 25, 25, 25, 25, 23, 23, 24, 25, 26, 27], [40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 39, 38, 38, 39, 38, 38, 38, 38, 38, 38, 38, 38, 37, 36, 35, 34, 33, 34, 33, 33, 33, 33, 33], c="black", marker="s")

Comments

[874-3175-8...]

ありがとうございます！