Steema Central

Hi,

I'm trying the TTrendFunction with a scatter graph.
In this graph there is a compact cloud, and few lost points, most on the right.

Here a screenshot if I add a trend line:




It's obvious that the trend line is false. At least the trend line is not what could be expected.

Is there a tool somewhere in steema library to automatically detect cloud, and ignore losts points ?


Here the result if I remove "manually" losts points, and add a new trend line (in green):



Thanks for any help,
Vincent.

Hi Vincent,

Yes, it seems that points far of the core are more significant for the function than the others.

As you say, one workaround could be setting a condition to filter the "distant points" but I'm afraid I can't think on a general solution right now. I recommend you, if possible, to do your custom filter knowing the characteristics of your series.

You could create a dummy points series inactive, copy the validated points from the original one to it, and assign the trend function to this filtered series.