# request (?) featured: matrices or tables for a particular column sort

Hello all-

This may be a stupid question, because I'm always still not quite clear on what are the differences between the matrixes and 2D arrays in LabView. So far the only distinction I seemed to find, it is that certain features of table return errors when the matrices are entered and vice versa.

Anyway, here's my question.

Suppose I have a matrix where the first column represents the 'values' that have been measured and the second column 'account'. I would like to take a unordered matrix (i.e., the value column is not ordered) and recover a matrix that has had its lines re-arranged according to the values in the first column.

For example, if my matrix:

[5-1;

0 11;

1-5;

3-10]

I would like to as labview to return:

[0-11;

1-5;

3-10;

1 of 5]

When I was trying to find a way to do it (without writing my own sorting routine which, admittedly, wouldn't be too bad, but I'm a lazy programmer ), the only thing I found that came close was the 'matrix of D 1 sort' Subvi. However, even if I had to store the values in a table and charges in another table, I'd be able to do is sort the table values. I wouldn't be able to tell what labview reorganization, I would need in order to perform the same reorganization charges.

I'm a little surprised that there isn't a quick and intuitive way to do this (at least that I can find). A LabView feature addition that could help with this problem would be if the "1 D Array sort" routine returned a second output - a vector with the mapping of the index used - similar to MATLAB. MATLAB help for the function 'out ':

"[There, I] = SORT(X,DIM,MODE) also returns a matrix of index I.. «If X is a vector, then Y = x.»

Of course, there may be a quick fix for what I'm missing...

Take a look at this post. I don't know that you can change for your particular type of data.

(in contrast to the first colum, create the sort key, table 2D reconstructed according to key)

Tags: NI Software

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