sorting coordiantes from a file
Asked by saad on 12 Dec 2012
Latest activity Commented on by Image Analyst on 13 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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3 Answers
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
1 Comment
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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