how to plot a histogram with distribution fitting?
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I want to plot a histogram with distribution fit.
I use this code:
z=[1,2,3,4,5];
l = [ 502 3341; 724 3502; 1310 3379; 2966 4001; 1915 3858];
figure;bar(l,'stacked')
set(gca,'xticklabel',z);
to plot a stacked fig.
but now I want to plot a histogram fig with distribution fit, - with my data - like this:
I use:
hist
but it didn't work ): , giving me an error "double"
how I can do this ?
4 Comments
Image Analyst
on 16 Aug 2015
Why are your counts and categories, and even the size of the dimensions of the badly-named "l" different all the time? I'm not even clear what you want. I see a Gaussian curve over a bar chart in both cases. What do you want? Do you want the bar stacked like when you used a 2D l instead of a 1-d l?
Answers (2)
Image Analyst
on 17 Aug 2015
If you have no particular shape in mind, like the last plot above that you showed with the lumpy red curve, then you can use a Savitzky-Golay filter (demo attached). Attach the data for your last bar chart and I'll show you how with your actual data.
0 Comments
Image Analyst
on 17 Aug 2015
Alright, I did a full blown demo for you. I let you choose an image to read in, then get the histogram, then smooth the histogram with a Savitzky-Golay filter (which is like a sliding polynomial filter). See the attached code below this image that it creates:
2 Comments
Zhang zhengnan
on 30 Jan 2016
Edited: Zhang zhengnan
on 30 Jan 2016
Thank you for your answer.Can you attach code about 'smooth the histogram with a Savitzky-Golay filter'?
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