I need to construct log dose response curves. I can do this by converting the
values on the x axis into log10 values.

I am stuck to how to get the ED50 values... (ed50 is basically the median
value)

Thanks

On Mon, 26 Nov 2007, in microsoft.public.excel.charting,
naf said:

I need to construct log dose response curves. I can do this by converting the
values on the x axis into log10 values.

I am stuck to how to get the ED50 values... (ed50 is basically the median
value)

Don't work out ED50 using a chart, work it out using spreadsheet cells.

You can display it on the chart after you've worked it out, if you like.

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Del Cotter
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