How do you find(tell, separate, group) the difference between these two graphs(datas) or calculate and grouping these two graphs?

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Phondanai Khanti 2021-4-30

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回答： Puru Kathuria 2021-5-2

I want to find a way to tell these two cases data as shown in the pictures without comparing to each other.

One is typically reducing from highest to lowest; another is at some range; there are modified.

Thank you.

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Scott MacKenzie 2021-4-30

编辑：Scott MacKenzie 2021-4-30

Why don't you put these plots in the same graph. The "difference" (that's what you are looking for, I think) will be visually apparent. That might be a good starting point. But, having read your question several times, it's not clear to me what you are trying to do. Please try to clarify. Posting the script or data might help, as well.

Phondanai Khanti 2021-4-30

Thank you for your comment.

I think it's not clear enough too.

This graph plots from singular values taken from SVD calculation.

First graph is normal plot. Second graph plot from modified singular values. So there is two type, original and modified.

In my work, in some process I will get many singular value datas (both original and modified) and I want to separate these datas into two groups.

Sorry if my English is not clear. Thank you for your help.

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Answer 1

Puru Kathuria 2021-5-2

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Hi,

You can start with combining multiple plots in the same graph for a better visual analysis.

%Example: 
x = rand(1,10); y = rand(1,10); 
plot(x); 
hold on; %retain current plot and add new plot 
plot(y)

Furthermore, you can move forward with bivariate analysis, finding correlation between both the variables or even as simple as finding differences between the values of these variables (euclidean/manhattan distance). This step will depend on the problem you are trying to solve.