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fit data to distribution issue

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Mustafa Al-Nasser
Mustafa Al-Nasser on 28 Jul 2020
Answered: Raunak Gupta on 6 Aug 2020
Dear All;
I am trying to fit data to a normal distribution and plot pdf but pdf plot shows several lines , i do not know why it is coming , could you help.
figure is attached
Turlough Hughes
Turlough Hughes on 28 Jul 2020
Can you provide the data also so we can replicate what you have done, ie the variable input
Mustafa Al-Nasser
Mustafa Al-Nasser on 28 Jul 2020
I extracted the related data part
Many thanks

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Answers (1)

Raunak Gupta
Raunak Gupta on 6 Aug 2020
From the code and data provided on question and comment, I see that the output you are plotting is not in sorted order. So basically, what you are currently seeing is the connected line between all the data points which is going in the direction of how the points are arranged in the input vector. For seeing a continuous line either you can sort both the input1 and y1 before plotting (And similarly for other two pairs) or instead of line you can plot circles for every datapoint. This will give correct visualization. Both approaches can be done like below:
% Sorting the input1 and y1 simultaneously
[input1sorted, ind] = sort(input1);
y1sorted = y1(ind);
plot(input1sorted, y1sorted,'LineWidth',2);
% plotting only dot for each datapoints

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