How to extract corresponding values of x-axis based y-axis values.

Good day,

Could someone please help me on how to extract corresponding values of x-axis based on y-axis values?

x=[1,3,4,8,3,5,6,4,5,6,7,9]

y=[3,5,6,7,4,5,6,7,8,0,3,4]

I would like to extract the corresponding values of these elements; 5,6,7,4,5,6,7(values from y-axis) in x-axis.

I only know how to find a corresponding single value not multiple values.

Thanks

[Adam Danz]

Matlab 101: Indexing

https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab.html

The solution will depend on how you chose those y-values in the first place.

BTW, it looks like you're missing 2 commas in your example.

[AUWAL ABUBAKAR]

Thanks for your help, Adam.

What i gave above is just an example.

I use mink(y,7) to choose those elements in y. so if

x=[1,3,4,8,3,5,6,4,5,6,7,9]

y=[3,5,6,7,4,5,6,7,8,0,3,4]

z=mink(y,7); thus z=[0 3 3 4 4 5 5]

thanks

[Adam Danz]

How do those z values correspond to the [5,6,7,4,5,6,7] values of y?

I still don't know how those values from y were chosen.

[AUWAL ABUBAKAR]

Thanks for your response, Adam

z values [0 3 3 4 4 5 5] are the 7 minimum values of y. These were extracted using 'mink'(y) as stated earlier. These values correspond to [6 1 7 3 9 3 5] of x which I would like to find.

so this is what i wanto find [6 1 7 3 9 3 5]

Thanks

[Adam Danz]

That's clearer. See the answer I added.

[AUWAL ABUBAKAR]

It works perfectly. Many thanks

Answer 1

[Adam Danz]

[z, zIdx] = mink(y,7); 
xz = x(zIdx); 

Answer 2

[Mara]

maybe use ismember:

idx = ismember(y, [5,6,74,5,67])

xvalues = x(idx)

P.S. sorry for the editing, I now read your problem correctly

[Adam Danz]

The problem with this approach is that the last value of y will also be matched. I believe the OP is trying to isolate only the 7-element segment.

[AUWAL ABUBAKAR]

Thanks, Mara. It works almost percfectly except for the issue Adam mentioned. The approach also matched the last value of y.

Thank you both once again for your help