Help needed pls: One data spike has "flattened" my data so I can't see it. What to do? | ThingSpeak API | Forum

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Help needed pls: One data spike has "flattened" my data so I can't see it. What to do?
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November 21, 2017
7:52 am
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kes
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November 21, 2017
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One data point/ measurement/ spike has "flattened" my data by changing the y-axis to 0 - 7 as shown here

Before the spike the y-axis range was 0.5 - 1.5 and I could see things as shown here.

Can I set the y-axis in the url as having limits ?

ps I tried setting the y-axis limit in the ThingsSpeak channel settings but this seems to have had no effect if the chart displayed contains the "spike" data point . 

November 21, 2017
2:36 pm
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Hans
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As one option, you can add the min and max parameter to your chart API.

http://api.thingspeak.com/channels/11286/charts/4?width=450&height=260&results=1000&dynamic=true&yaxis=Boiler%20Pressure%20Bar&title=Boiler%20Pressure%20Bar&min=0&max=5

The second option is to process your raw data using a MATLAB filter, then write the data to a clean channel.

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