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Asked by saad 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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Answer by saad on 12 Dec 2012

Edited by saad 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 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.

Answer by saad 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

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