[Question from NMRWiki Q&A forum] How to do a Shearing Transform in nmrPipe?

[nmrlearner]

How to do a Shearing Transform in nmrPipe?

Hi, In want to do a shearing transform of 2Q-1Q correlation spectra into a 1Q-1Q type projection. This is possible in NMRpipe using the macro shear.M, and it technically works fine.

The macro is as follows:

shift = slope*(yLoc - offset);

p0 = 0.0; p1 = -360.0*shift;

(void) hilbert( rdata, idata, size );
(void) ift( rdata, idata, size );
(void) phase( rdata, idata, size, p0, p1 );
(void) fft( rdata, idata, size );


Now the "slope" and "offset" are the input. I think the slope value to be input should include somehow also the dwell time in the indirect dimension. However, i cannot figure out which units i should use for time...

Perhaps some of you have experience, could you please guide me therough the process...

Thanks in advance..



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