How to "double" a 2D array?

[SteveChandler]

This image shows the output array I want from an input array.

What is the best way to do this? (Best meaning fastest and most memory efficient).

I want to double the size of an image. I don't have IMAQ. I know about the zoom factor on image controls but that is not what I want.

[aeastet]

Sorry I realized that I only did it one way.

[ben64]

Here is one possibility.

Probably not the fastest and most memory efficient but it works.

Ben64

[aeastet]

ok here is mine

[Luis_AM3C · Accepted solution]

Hi,

      I did a solution using in-place memory, for best performance.

Best Regards,

[aeastet]

A small revision

[JÞB]

I whent for the IPE as well but used a logical shift to avoid the mutiply by 2s

OK Steve- Benchmark 'em

[aeastet]

and one more revision maks it so you can add how ever many copies you want.

[SteveChandler]

Thanks everyone!

I did some benchmarking. These are the results (vis set to high priority no debug)

Converting a 5000x5000 array, times in seconds

Luis          .43

Jeff           .43

Ben64       2.5

aeastet    .669

It is a tie between Jeff and Luis. Since the only way I can think of to decide who gets the solution is whoever posted first it goes to Luis.

[Luis_AM3C]

Hi,

     Thanks

      A more thing, you can enable loop iteration parallelism for get better time.

Best Regards,