I have a dataset with logarithmic xvalues (of concentration being diluted by a factor of 10) and regular (nonlogarithmic) yvalues. When I format the xaxis to use a logarithmic scale, the yaxis is displayed on the right side of the graph instead of the left side of the graph like it is supposed to be. What causes this, and is there any way I can put the yaxis back in its proper position?
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Why? Because your concentrations are less than 1 so the logarithms are negative values. To fix, format the xaxis and select Vertical axis crosses: Axis value and supply a value smaller than your minimum xaxis value. 


you can set the crossing point of the axis For your data set, set Vertical axis crosses = 0.00001 


I always use a ridiculously small value for a minimum "crosses at" value, so that changing data doesn't again shift the axis. In this case, something like 1E100. 

