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Navigation: What's new in Prism 7? > What's new: Statistical analyses

New analysis to transform concentrations

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Prism has always had a versatile transform analysis. Prism 7 adds a new analysis to simplify transforming concentrations entered into the X column of an XY table.

This analysis can do any or all of these tree things:

Handle zero concentrations differently. Zero concentrations are sometimes a problem because the  logarithm of zero is not defined, so zero concentrations are lost in a log transform. With this analysis, you can specify that zero be substituted with a low value (say 10-9) before taking the logarithm.

Change units, for example from molar to nanomolar. Simply tell Prism what constant to multiply or divide by.

Transform to logarithms, often needed prior to fitting a curve.

 

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