cftool and log-scale

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Max Chuan Chen
Max Chuan Chen 2012-5-6
Hey i want to use curve fitting with log-scale y-axes, but it seems i cant change the y-axes from linear to log in cftool. i must have the figure in log-y-axes before fitting because i need to exclude some part of it.
I try the metod with genrate code, and replace plot with semilogx, it only works after the fitting....
basiclly i want to: log-Y-axes -> exclude some parts -> and do linear fitting with the rest. any idea???
  1 个评论
Geoff
Geoff 2012-5-7
It's not really 'linear' fitting if your data has a logarithmic trend. Either scale your Y-data by log, then do your exclusions and linear fitting, or do a logarithmic fit (which appears to be linear on a log scale)

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