Is confusion matrix possible in one column I am performing anomaly detection using K-Means. I am working with only one column, plotting those values and then within this column I am adding some anomalies.



My question is 

if it is possible to perform confusion matrix for this ? If so what is the approach ?
Asking this since I have seen that confusion matrix needs y axis and x axis
Confusion matrix needs groun truth values and predicted values.

You have _____, so you need other part for this multiclass confusion matrix.