I have a 1d array of data I need to have in 2d. Example.1234123412341234........... needs to be 123412341234...There is no set number of data points. The data come from daq read and can be 1-8 channels. So the 1d array will have 1-8 points repeated over and over (different data from same channel). The 2d array would strip out the 1-8 channels of data into 1-8 columns and hoverever many rows and I collect.

Your data looks like plain arrays and not "waveforms" (which is a specific LabVIEW datatype). 😉 Typically, one would append columns instead of rows, but you can always transpose the array later for the indicator. Be aware that growing arrays without upper limit can get you in memory trouble, so you should have some checks in place. Growing arrays in fast loops is also inefficient, because each array resizing operation requires a new memory allocation. (NOTE: This assumes you have a relatively new LabVIEW version. In older version, you need a feedback node or shift regsiter tied to the while loop. What is your LabVIEW version?)) Of course there are other ways to grow by columns directly using "insert into array", but that's equally memory inefficient. If the final array size is typically similar, you should allocate a 2D array of NaN, sized with the upper limit of "# of colums" and then use "replace array subset" to fill it with real data. Message Edited by altenbach on 01-09-2009 08:12 AM

LabVIEW

1d array into 2d array

Solved!

This code would do the trick. But the input format must be as you stated. SN, can be duplicated many times, followed by two empty cells, followed by Freq, Amplitude, and empty cell. The VI will skip over any duplicate SN.