## sorting coordiantes from a file

### saad (view profile)

on 12 Dec 2012

i have a file which i load in matlab

the file has three columns

```*xvalues*     *y values*    *energy values*
4               5            344
5               1             285
0               0             455
0               1             203
```

the problem is i want to arrange 1st and 2nd columns as coordinates , so that (0,0) is followed by (0,1) and so on with there values ..

how can i sort it to align values such that the above chart is sorted to

```   0               0             455
0               1             203
4               5             344
5               1             285```

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### Walter Roberson (view profile)

Answer by Walter Roberson

on 12 Dec 2012

sortrows()

on 12 Dec 2012

### saad (view profile)

on 12 Dec 2012

Walter ,

I have used sortrow , but the example above was a toy ..

if

a=

``` 4               5            344
5               1             285
0               1             455
0               0             203 ```

and i do b=sortrows(a,1)

then

still the second column is not arranged

```0               1            455
0               0            203
4               5            344
5               1            285
```

where as i want to arrange exact coordinates like

b=

```0               0            455
0               1            203
4               5            344
5               1            285
```

Walter Roberson

### Walter Roberson (view profile)

on 12 Dec 2012
```sortrows(a)
```

Note: in your sample "a" here, your 4th row is [0 0 203] which does not appear in your desired output "b". Your desired output corresponds to your original data matrix.

### saad (view profile)

on 12 Dec 2012

oh sorry that was a typo

now

a=

a=

``` 4               5            344
5               1             285
0               1             455
0               0             203 ```

b=sortrows(a,1) give

b=

``` 0               1            455
0               0            203
4               5            344
5               1            285```

Where as what i want is

b=

``` 0               0            203
0               1            455
4               5            344
5               1            285```

Walter Roberson

### Walter Roberson (view profile)

on 12 Dec 2012
```b = sortrows(a)
```

Notice that I did not have a ,1 argument.

### saad (view profile)

on 12 Dec 2012

Thanks , solved -----

Image Analyst

### Image Analyst (view profile)

on 13 Dec 2012

Then mark this question as "Answered" - OK?

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