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#1
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0 on a logarithmic axis
I have a chart I am trying to plot data from 0ng to 1.9mg and a logarithmic
scale works beautifully except that I have an important value at a 0ng (the start of my curve). Is there anyway to make the 0 value show up in a logarithmic scale? Thanks, -E |
#2
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0 on a logarithmic axis
No. Zero on a log scale would be at minus infinity. You could change the
value from zero to something very small (10^-n g), but how small you make it will affect where it appears on the log scale; that's how logarithms work. -- David Biddulph "E" wrote in message news I have a chart I am trying to plot data from 0ng to 1.9mg and a logarithmic scale works beautifully except that I have an important value at a 0ng (the start of my curve). Is there anyway to make the 0 value show up in a logarithmic scale? Thanks, -E |
#3
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0 on a logarithmic axis
I had a feeling that is what the answer would be. If I do change the value
of my 0 to 10^-n, is there a way to remove the logs I do not need (ie go from ..00001 to 1 without the huge space in between)? "David Biddulph" wrote: No. Zero on a log scale would be at minus infinity. You could change the value from zero to something very small (10^-n g), but how small you make it will affect where it appears on the log scale; that's how logarithms work. -- David Biddulph "E" wrote in message news I have a chart I am trying to plot data from 0ng to 1.9mg and a logarithmic scale works beautifully except that I have an important value at a 0ng (the start of my curve). Is there anyway to make the 0 value show up in a logarithmic scale? Thanks, -E |
#4
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0 on a logarithmic axis
You could probably use a broken axis:
http://peltiertech.com/Excel/Charts/BrokenYAxis.html -- David Biddulph "E" wrote in message ... I had a feeling that is what the answer would be. If I do change the value of my 0 to 10^-n, is there a way to remove the logs I do not need (ie go from .00001 to 1 without the huge space in between)? "David Biddulph" wrote: No. Zero on a log scale would be at minus infinity. You could change the value from zero to something very small (10^-n g), but how small you make it will affect where it appears on the log scale; that's how logarithms work. -- David Biddulph "E" wrote in message news I have a chart I am trying to plot data from 0ng to 1.9mg and a logarithmic scale works beautifully except that I have an important value at a 0ng (the start of my curve). Is there anyway to make the 0 value show up in a logarithmic scale? Thanks, -E |
#5
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0 on a logarithmic axis
Thanks David!
"David Biddulph" wrote: You could probably use a broken axis: http://peltiertech.com/Excel/Charts/BrokenYAxis.html -- David Biddulph "E" wrote in message ... I had a feeling that is what the answer would be. If I do change the value of my 0 to 10^-n, is there a way to remove the logs I do not need (ie go from .00001 to 1 without the huge space in between)? "David Biddulph" wrote: No. Zero on a log scale would be at minus infinity. You could change the value from zero to something very small (10^-n g), but how small you make it will affect where it appears on the log scale; that's how logarithms work. -- David Biddulph "E" wrote in message news I have a chart I am trying to plot data from 0ng to 1.9mg and a logarithmic scale works beautifully except that I have an important value at a 0ng (the start of my curve). Is there anyway to make the 0 value show up in a logarithmic scale? Thanks, -E |
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