Comments and Ratings

thanks for code.

This is the function I was looking for. Great work. Makes plotting arrows a piece of cake.

Thanks for sharing

@Samuel: did you resolve your problem?
I do not know your exact problem but maybe what you want is this:
handle= subplot(221); % or something like this
ellipse_t = fit_ellipse(x,y,handle); % the ellipse should be drawn on the subplot else your ellipse is out of range if I am not wrong

Had similar problem to John Finan above and used same fix. However have other problem with fit_mix_gaussian: it seems to be sensitive to magnitude to data. Using data scaled from appr. -0.7 to 5 it gives me a fit which is incorrect (data is skewed in some manner I have not identified). Changing the magnitude of the input vector via multiplication by some constants causes it to not converge for > 50k iterations.

Rather than systematically determine the failure modes, is there any info on requirements on input vector, such as normalization, etc.? I see normalization required for LSE's but for gaussian?

Thanks

good jop

Guys, i use Randraw function to generate data randomly from a truncated normal distribution, but when i tested the generated data if they have come from a Normal distribution (not truncated), the hypothesis was rejected. which means that the data can not be assumed to have come from a Normal distribution, If I use the Normal distribution to fit my collected data using for example dfittool tool box, I get a mean and sigma values , when I use them to genera data from the randraw function with using (y = randraw('normaltrunc', [0, +inf, mu, sigma], 1, 1e5), the data obtained do not follw a normal distribution. so what i need is some kind of distribution fitting tool that can fit my original field collected data to a left Truncated normal distribution and give me the right parameters , i.e. mu and sigma
regards

Love it. Works as advertised.

It is great help to me.thanks for the code

Exactly what I was after, perfect. Does what it says, does it well and easily.

Excellent code, thank you for sharing.

Hello there,
I found your application very usfull and I winder if it is possible to use it and to ask you one question please.
Thank you,
Elli

Awesome! I just had to modify the program to plot the non-rotated ellipse instead, otherwise this was perfect!

clever

NO COMMENT

thanks

Bug: max of head width is not calculated with max_width but max_length

good work

This submission requires the statistics toolbox, in order to use the 2D gaussian fit (line 32, build_mix_2D_gaussian.m)

helpful. but 3d should be considered.