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Using 'ismember' against multiple sets of parameters

Asked by Kim Yu Jo on 4 Jan 2013

Hi there,

I'm trying to find two sets of parameters (Keeper_Indexes 1 & 2), and locate them on an image (Labeled_Image):

```Keeper_Indexes1=find( 0.7 < para1 & para1 < 0.72);
```
```Keeper_Indexes2=find( 0.9 < para1 & para1 < 0.905);
```
```PossibleCracks1 = ismember(Labeled_Image, Keeper_Indexes1);
```
```PossibleCracks2 = ismember(Labeled_Image, Keeper_Indexes2);
```
```figure, imshow(PossibleCracks1,'DisplayRange', []),title('Possible Cracks1');
```
```figure, imshow(PossibleCracks2,'DisplayRange', []),title('Possible Cracks2');
```

This is the current code i'm using, however, is there a way to integrate Keeper_Indexes 1 & 2 together, or to integrate two ismember functions into one? Meaning, figuratively,

```Keeper_Indexes = find( 0.9 < para1 & para1 < 0.905) & find( 0.7 < para1 & para1 < 0.72);
TotalPossibleCracks = PossibleCracks1 + PossibleCracks2
```

1 Comment

Sean de Wolski on 4 Jan 2013

My guess is you can bypass both find() and ismember() with simple logical indexing.

Please post small example matrices (or explain how we can create sample matrixes) so that we can reproduce it.

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Answer by Image Analyst on 4 Jan 2013

Yes, you can combine the lines. Just do

```Keeper_Indexes = [Keeper_Indexes1, Keeper_Indexes2];
PossibleCracks = ismember(Labeled_Image, Keeper_Indexes);
imshow(PossibleCracks>0); % Binarize and display.
```

1 Comment

Kim Yu Jo on 4 Jan 2013

Thank you very much!! =)