Why does the PlotRange option in
list=Table[{x,Exp[Sqrt[x]]},{x,0,25}];
ListLogLogPlot[list,PlotRange->{0,10},Joined->True]
not work although there is no error-output? The same holds for ListLogLogPlot.
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asked Jan 3, 2013 at 19:10
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2 Answers
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This is because you gave 0 as the lower limit and $\log (0)=-\infty$. If you look at the implementation of ListLogLogPlot, you'll see that somewhere along the line, the limits are converted to {N@Log@min, N@Log@max} and then plotted with ListPlot and the tick labels are tidied up. This is the specific line in the implementation:
logYPlotRange[{min_?Positive, max_?Positive}, r_] := N[{Log[min], Log[max]}]
So an extreme plot range will automatically be converted to something more "reasonable" that displays the plot. However, I do agree that a warning should be included. For instance, if you use -∞ as a plot range in Plot, you get the following warning:
Plot::prng:Value of optionPlotRange -> {-∞,1}is notAll,Full,Automatic, a positive machine number, or an appropriate list of range specifications. >>
If you want to set the limits for the axes from within PlotRange, then avoid 0. For example:
list = Table[{x, Exp[Sqrt[x]]}, {x, 0, 25}];
ListLogLogPlot[list, Joined -> True, PlotRange -> {{1, 10}, {1, 50}}]
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If you look at the implementation of ListLogLogPlot. Where did you take a look at the implementation? Is that possible? $\endgroup$– a06eNov 8, 2017 at 17:15
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I've seen problems with this before but can't find the reference right now. So here is a solution:
list = Table[{x, Exp[Sqrt[x]]}, {x, 0, 25}];
ListLogLogPlot[list, Joined -> True, PlotRange -> {1, 10}]
or
list = Table[{x, Exp[Sqrt[x]]}, {x, 0, 25}];
ListLogLogPlot[list, Joined -> True, PlotRange -> {All, {1, 10}}]
The problem of course could be called a bug, but in some sense it's also understandable that the plot range specification breaks when you put in a value of 0 for the argument on the x or y axis in a log-log plot. After all, the logarithm isn't defined there. It would be better if the function could recognize this and warn you, instead of ignoring the input altogether.
