where $n$ and $m$ are the dimensions of the box.<br>
Note that a number of programs, for example peakint (http://hugin.ethz.ch/wuthrich/software/xeasy/xeasy_m15.html) does not use all points within the box.<br>
And if the number N can not be determined, this category of error analysis is not possible.
Also {{note |there are a number of programs, for example peakint (http://hugin.ethz.ch/wuthrich/software/xeasy/xeasy_m15.html) that not use all points within the box. And if the number N can not be determined, this category of error analysis is not possible.}} {{note|Also for non-point summation methods, for example when line shape fitting is used to determine peak volumes, the equations above cannot be used. <br> Hence again this category of error analysis cannot be used. <br>This is the case for one of the three integration methods used by Sparky (http://www.cgl.ucsf.edu/home/sparky/manual/peaks.html#Integration). <br>And if fancy techniques are used, for example as Cara does to deconvolute overlapping peaks (http://www.cara.ethz.ch/Wiki/Integration), this again makes this error analysis impossible.}}
=== Peak volumes with partially replicated spectra ===