## Plotting doubt: making a curve with points

### Andoni Mendialdua (view profile)

on 22 Aug 2014
Latest activity Answered by Star Strider

on 22 Aug 2014

### Star Strider (view profile)

Hi all, I have the following code:

```figure
COPlin=Y./Yg;
plot(AATnew,COPlin)
axis([-10 80 0 1])
```

I want to make a curve, but Matlab is doing lot of lines between the points. What I want to obtain is a unique curve that put together all the points.

I would be glad if you could help me:)

on 22 Aug 2014

what's the size of COPlin and AATew?

Andrew Reibold

### Andrew Reibold (view profile)

on 22 Aug 2014

Not enough information. You could model with a polynomial but we couldn't possibly guess at what order it needs to be. You could model with moving line average curve smoothing but we have no idea the size of these arrays or their features/values to know what would work. You could try interpolation but we again dont know enough about your problem to know what would be best.

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### Star Strider (view profile)

on 22 Aug 2014

I am not exactly certain what the problem is, but if my guess is correct, the sort function may be the solution:

```AATnew = randi(90,20,1)-10;         % ‘AATnew’ is a (20x1) array
COPlin = rand(20,1);                % ‘COPlin’ is a (20x1) array
```
```[Ms,Mi] = sort(AATnew);             % Sort ‘AATnew’, keeping indices
```
```figure(1)
plot(AATnew,COPlin,'-*')            % Plot Original UNSORTED data
grid
```
```figure(2)
plot(AATnew(Mi),COPlin(Mi),'-*')    % Plot SORTED data
grid
```

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