plotting, tools and fitting
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I plot two lines using
Then in figure clicking on Tools I can do basic linear fitting through series one (data1)
When I also want to do a linear fit through series two(data2), the first fit disappears
How can I keep both linear fits (through data1 and data2) in place
I tried lsline but this can only be applied to scatter (x,y) it looks like
What other possibilities are there.