How to fit a hill curve on scatterplot

Hi,

I've been plotting dose-response curves of the concentration of a drug vs. the response. I want to insert a binding curve based on the Hill equation on top of my scatterplot and was wondering how I can fit this curve on my graph. Here's the equation that I've been referring to and I've also been looking into custom matlab functions like this, but I've haven't really had much success. Here's my code and graph:

scatter(conc_nm_5ht,resp_conc_5ht)

set(gca, 'XScale', 'log')

Thanks!

Answer 1

[Rishita]

mx = 0;

mn = 1;

ec50 = 0.25;

n=5;

x=0:.01:1;

y = mn + (mx-mn)*ec50^n./(ec50^n+x.^n);

plot(x,y)

grid on

Try this

[Aaron Ouyang]

Thanks.

That generates a generic sigmoidal curve. How can I get it to fit my data specifically though?