How do I edit an existing equation (and then replot it)...?

joecar · Post by **joecar** » Thu Oct 19, 2006 1:58 pm

David,

Hi there.

It's not clear to me how to edit an existing equation, other than creating a new document and generating a new function.

Thanks,
Joe

Post by **DPlotAdmin** » Thu Oct 19, 2006 5:02 pm

Joe,
Regardless of how a plot is created, DPlot only stores data points, not the equation that generated that data. There's no way to edit an equation once a curve is generated. Depending on how you want to manipulate the equation you might be able to apply a transform using Edit>Operate on Y. But the easiest way is to just use Generate>Y=f(X) again with the new equation, then delete the previous curve (Edit>Erase or the Erase button). There's no need for a new document, the new curve will be added to the existing document.

joecar · Post by **joecar** » Thu Oct 19, 2006 5:06 pm

David,

Ok, erase curve and generate a new one in same document, got it.

Thanks
Joe

Post by **DPlotAdmin** » Thu Oct 19, 2006 5:19 pm

Except that you probably want to reverse the order if your document only contains that one curve. If you erase the one and only curve then everything (titles, axis labels, other formatting) gets wiped out.

joecar · Post by **joecar** » Fri Oct 20, 2006 4:18 pm

DPlotAdmin wrote:Except that you probably want to reverse the order if your document only contains that one curve. If you erase the one and only curve then everything (titles, axis labels, other formatting) gets wiped out.

Ah, ok.