November 21, 2017
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 .
January 18, 2011
As one option, you can add the min and max parameter to your chart API.
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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