Questions tagged [azure-anomaly-detector]

The Anomaly Detection service detects anomalies automatically in time series data. It supports two functionalities, one is for detecting the whole series with model trained by the time series, another is detecting the last point with model trained by points before.

The Anomaly Detection service detects anomalies automatically in time series data. It supports two functionalities, one is for detecting the whole series with model trained by the time series, another is detecting the last point with model trained by points before. By using this service, business customers can discover incidents and establish a logic flow for root cause analysis. To ensure online service quality is one of the main reasons we developed this service. Our team is dedicated to continuing to improve the anomaly detection service to provide precise results.

https://azure.microsoft.com/en-us/services/cognitive-services/anomaly-detector/

Batch detection To detect anomalies throughout a batch of data points over a given time range, use the following request URI with your time series data: /timeseries/entire/detect. By sending your time series data at once, the API will generate a model using the entire series, and analyze each data point with it.

Streaming detection To continuously detect anomalies on streaming data, use the following request URI with your latest data point: /timeseries/last/detect. By sending new data points as you generate them, you can monitor your data in real time. A model will be generated with the data points you send, and the API will determine if the latest point in the time series is an anomaly.

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How does Kusto series_outliers() calculate anomaly scores?

Can someone please explain how the series_outliers() Kusto function calculates the anomaly scores? I understand that it uses Tukey fences with a min percentile and max percentile given a numeric array, but I would like to know in more details what…
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Azure Anomaly Detector - only detects spikes

I am testing anomaly detector on metrics of count of specific event per hour for last 90 days. For some reason I always get spikes (isPositive) only, but never drops, while I'm mostly interested to detect drops. Data has weekly seasonality (expected…
Alex Michel
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What anomaly detection algorithms does Microsoft offer in the Anomaly Detection API

I am exploring the Microsoft Azure anomaly detection API for potential use in my organization. I want to know what algorithms (such as isolation forest, one-class SVM, autoencoder based anomaly detection) are available in the library. What choice of…
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When to use “/entire” vs “/last” API in Azure Anomaly Detector?

As I went throught the docs of Anomaly Detector APIs, I've found there're two APIs (or "modes") : /last and /entire. The doc says they're streaming versus batch modes. However, I don't think the message is super clear and the two APIs/modes seem…
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Azure Multivariate Detector for weekly timeseries data

I am exploring azure multivariate detector services to apply on my multivariate timeseries having weekly periodicity. Problem Statement: I have data having 105 rows(105 weeks) for one category.I have such 20k categories multivariate timeseries data…
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I have an Azure Multivariate Anomaly Detection Batch Request problem, though my model was successfuly trained

I have a Multivariate Batch Request problem using the Micrososft Azure Anomaly Detection and though my model was successfuly trained I constantly receive error messages when querying the results. I cannot solve the error myself and thats why I ask…
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How to train model with new data in azure cognitive services anomaly detector

I have started studying anomaly detector. According to my use case multivariate anomaly detector is good. I have created a model with my base data with HTTP post API (https://{endpoint}/anomalydetector/v1.1/multivariate/models) and tested anomaly in…
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Calculating upper margin in Azure Anomaly Detector Service,

In Azure Anomaly Detector service, why is the upper boundary calculated as upperBoundary = expectedValue + (100 - marginScale) * upperMargin any not upperBoundary = expectedValue + upperMargin
Manu Chadha
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How to use the Multi-variate Anomaly Detection Cognitive Service by Azure?

In the latest version of the Anomaly Detection Service by Azure which supports the Multi-variate Cognitive Service, we need to train a model and then consume it. The quickstart documentation for Python mentions a few libraries which are not getting…
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In Azure Anomaly Detector API,Why is changing sensitivity parameter is not changing response output of detected anomaly?

with reference to notebook available on Azure-site, I have created an experiment, where am pushing some 5000 records of the parameter. I tried changing sensitivity from 90 to 25 but I can-not see any changes on output bokeh plot. sensitivity =…
Amar P.
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Will the anomaly detector provide stateful version?

I have tried the new anomaly detector for some days, it seems workable in most of the cases. But it seems it is total stateless and I have to push all the history data for one single detection. It is very difficult to scale in our current system.…
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Looking for suitable a service in Azure

I'm currently looking for particular service in Azure for my side project. I'd like to build a real-time service that gives alerts or notifications to users by detecting anomaly values from a time series data of temperatures collected over a time…