concatenate all columns of a 2D wave into a 1D wave

Share icon

Hi all,

I'd like to concatenate all columns of a 2D wave (let's say of shape (200*720)) to a 1D wave (-> shape of (144000)).
I'm desperately trying with a "for" loop and concatenate function, but it doesn't work nicely... Is there a built-in function I could call to do the job?

Thanks for your help!
J-E
Here is the code I'm using. I get an error message saying index out of range for wave mxT....

<br />
Function mx_col_conc()<br />
    variable i, count=0<br />
    wave mxT, zpolar<br />
    for (i=0;i<numpnts(zpolar);i+=dimSize(mxT,0))<br />
        zpolar[i,i+dimSize(mxT,0)-1]=mxT[p][count]<br />
        count+=1<br />
    endfor<br />
End Function<br />
</span>

February 10, 2015 at 10:56 pm - Permalink

You could do a redimension. Just make the number of points as the row number of points.

from documentation:
Details
The waves must already exist. New points in waves that are extended are initialized to zero.
In general, Redimension does not move data from one dimension to another. For instance, if you have a 6x6 matrix wave, and you would like it to be 3x12, the rows have been shortened and the data for the last three rows is lost.
As a special case, if converting to or from a 1D wave, Redimension will leave the data in place while changing the dimensionality of the wave. For example, you can use Redimension to convert a 36-element 1D wave into a 6x6 matrix in which the elements in the first column (column 0) are the first 6 elements of the 1D wave, the elements of the second column are the next 6, etc. When redimensioning from a 1D wave, columns are filled first, then layers, followed by chunks.

February 10, 2015 at 04:13 pm - Permalink

Thanks for the tip!

unfortunatly, when I do Redimension/N=(144000,1) mxT, the first 200 rows are saved, but the following 143800 rows are still 0....
Do you know if there is a supplementary parameter to add in the cmd line?

February 10, 2015 at 11:03 pm - Permalink

To convert to 1D, use Redimension/N=(144000) instead of Redimension/N=(144000,1).

February 11, 2015 at 05:32 am - Permalink