How to copy a wave into another wave a a defined position?

And: the work around does not work within a routine in igor7...

It is not totally clear to me what you are trying to do, but here is a short summary of wave assignments for the RIGHT-SIDE expression (I just note the 1D case here):

• use [ ] backets to target the point location of the source
• use ( ) brackets to target the scaled location of the source
• use 'p' to get the point locations of the target
• use 'x' to get the scaled locations of the target

So ...

t1[15,24]=t2 // implicitly the same as ...
t1[15,24]=t2[p] // does not work, since 15 is already outside the point range of t2

You probably want ...

You may want to give this a read to learn more:

Thank you, 

I was not aware that I can use calculation on [p] as in [p-15].

Best Ralf

Ps: use case is the follwing: I read a binary data file, extract a subset, correct an artefact , copy the corrected part back , write the file back to be used in original application.

Great that it worked for you. You can do quite a few things with wave assignments. By the way, your second example would have worked if you did:

SetScale/P x 15,1,"", t2
SetScale/P x 0,1,"", t1
t1(15,24)= t2(x)

but this is worse than using the point scaling directly, if possible. In general, the wave scaling might be used for actually defining the x axis after all.