Hi Badtnik I will try to clarify what I meant. As an example, let's take a Column Chart with logScale=true. In this case the y-axis will be labeled in a logarithmic fashion (example 0, 10, 100, 1000 ...) However, the column values are not logarithmic - they are the real values. So for example, a column having a real value of 1000 will correspond to the 1000 y-axis label.
Since the data values are the real data values and not logarithms, I don't see any problem having the same method of logarithmic labeling of the negative y-axis. On Aug 10, 12:55 pm, Badtnik <[email protected]> wrote: > Hey Adam > > What you are suggesting is interesting but might cause a lot of confusion, > for example: > - the values -10 and 1/10 will be positioned in the same height > - the value 0.5 will be positioned lower than -0.5 > In general, the positioning function you are suggesting is not monotone nor > is it continuous. > > Wikipedia:http://en.wikipedia.org/wiki/Logarithmic_scaleseems to only > describe logarithmic scale of positive values > Do you have any reference to literature or an example of a well known > charting tool that behaves that way? > > Badtnik > > On Mon, Aug 9, 2010 at 6:30 PM, Adam <[email protected]> wrote: > > Why does the logScale configuration option of the Column and Bar > > Charts require all values to be positive? (according the the > > documentation) > > > There is no reason for negative values not to have a log scale. The > > scale should be calculated according to the absolute values of the > > data. So the negative log scale would be something similar to -1, -10, > > -100, ... > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google Visualization API" group. > > To post to this group, send email to > > [email protected]. > > To unsubscribe from this group, send email to > > [email protected]<google-visualization-api%[email protected]> > > . > > For more options, visit this group at > >http://groups.google.com/group/google-visualization-api?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google Visualization API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-visualization-api?hl=en.
