Good morning, can you tell me what my mistake is. I use Spyder (Python 3.8)

Question

def Graficar(self):
data = self.txtingresodatos.toPlainText()
data=float(data)
data.plot()

def anomalia(self):
plt.rcParams['figure.figsize'] = (16.0, 6.0)
data = self.txtingresodatos.toPlainText()
data.plot()
wind = 20
sigma = 2
data["suelo"] = data[0].rolling(window=wind)\
.mean() - (sigma * data[0].rolling(window=wind).std())
data["techo"] = data[0].rolling(window=wind)\
.mean() + (sigma * data[0].rolling(window=wind).std())
data.plot()
data["anom"] = data.apply(
lambda row: row[0] if (row[0]<=row["suelo"] or row[0]>=row["techo"]) else 0, axis=1)
data.plot()