How to extract uncertainty from experimental data using MATLAB.?

2018 8 28
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更新时间：2018 8 29
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Hi everyone, I have an experimental data A=54×1800. Now I need to extract the uncertainty from it. I do not know which function or code used for this purpose and how to do this. Any guidance will be highly appreciated.

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madhan ravi
madhan ravi 2018-8-28
编辑：madhan ravi 2018-8-28

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I'm not really sure what datas you want but:
A = load('A.mat')
A.A(:,1) % this would give you the first column likewise you can extract rows and columns as in matrix.

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Safi ullah
Safi ullah 2018-8-28
编辑：Safi ullah 2018-8-28
@ madhan ravi, The result obtained from
A = load('A.mat')
A.A(:,1) %
will be uncertainty??
madhan ravi
madhan ravi 2018-8-28
I'm not sure what uncertainty refer to . I just showed an example to extract data from a mat file.
Safi ullah
Safi ullah 2018-8-28
@ madhan ravi,is there any method which can give us uncertainty from data?
madhan ravi
madhan ravi 2018-8-28
According to what I surfed through the internet it means the tolerance is called uncertainty . It is all based on what criteria the data was saved. Would you care explaining how the data was saved?
Safi ullah
Safi ullah 2018-8-28
I used a radar data, in which from literature of that radar I just know if you pick/move any one data into matlab workspace then there different information of that particular data comes. In that info there is one matrix r_error=54×28; in this the first column is error, the other 28 col are zeros.
madhan ravi
madhan ravi 2018-8-28
Here I have attached your file in csv format as row vector and there aren't zeros whatsoever.
Safi ullah
Safi ullah 2018-8-28
Actually the data which attached is after using a software which gives me parameters. from the same data I am going to attached only one data then you move that in workspace there you will see 'r_error'. in this the first col shows the error.
madhan ravi
madhan ravi 2018-8-28
编辑：madhan ravi 2018-8-28
A1 = load('16621201.mat')
A1 = vpa(A1.r_error)
%used vpa here to make the numbers complete without the powers so that it is precise to analyse the values and to be frank was easier for me to analyse.
[m,n]=size(A1)
% as you mentioned eliminating the first col because it contains error
A1=A1(:,2:end)
%this is just to make sure the first column is eliminated, compare it with the previous matrix
[m1,n1]=size(A1)
madhan ravi
madhan ravi 2018-8-29
Is that what you require if not say what is additionally required ?
Safi ullah
Safi ullah 2018-8-29
@ madhan ravi, I just checked your code. it works well. thank you so much for guidance

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Safi ullah
Safi ullah 2018-8-28

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@ madhan ravi thanks for your response. I have attached the file. I have given the task to extract uncertainty from 'A' and they are not specify. I also do not know how to recognize uncertainty in this data. Will be good if you show me an example based on the data 'A' which i have attached. thanks

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madhan ravi
madhan ravi 2018-8-28
编辑：madhan ravi 2018-8-28
If you do not know which are not certain in your data how I am supposed to know?
Safi ullah
Safi ullah 2018-8-28
@ madhan ravi, If possible then you just give me a rough example I just want to get idea how to extract the uncertainty from data

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