Curve Fitting on Histogram

Hi, so I am trying to fit a polynomial curve on the histogram data, but I have problem in the implementation. I am using the function 'histfit' like so:

[j,qout] = hist(data,700); 
h = histfit(data, 700, 'beta');

but it's coming with an error, stating:

All values must be within the closed interval [0,1].

I don't see such an implementation on the documentation of the function. Help would be much appreciated.

Answer 1

[dbmn]

Hi Ahmed,

if I use

data = rand(1e6,1);

it works flawlessly, but if I use

data = 2*rand(1e6,1);

I get the same error. As the error suggests, the function only works on Data Ranges [0,1].

[Ahmed Ismail]

Ah, now I understand, so is there an alternative for values that exceed 1, or is it a simpler option just to normalise the histogram?

[dbmn]

data = data./max(data)

should normalize your data. Maybe check first if max(data)>0 :)