Hi,
On 26.05.06, Serial wrote:
> I don't know if I'm doing something wrong or if there is a bug
> somewhere... I have a graph with y values in ]0;1[, and associated
> standard deviations in ]0.01;0.3[ . What I want to do, of course, is
> to display these values with some error bars representing the
> standard deviations.
>
> I perfectly succeed generating a valid .pdf file when both axis are
> linears, but obtain various error messages when trying to open this
> file with different softwares when both axis are logarithmic ("There
> was an error processing a page. Too few operands", "An unrecognized
> token 'nan' was found").
>
> Am I doing something wrong !?
I'm not sure. It might be that you're trying to access a position on a
logarithmic axis for a negative value. Depending on the system this
might result in NaN's in the output. (The behaviour of log(-1) is
maschine dependend. On my PowerBook a math.log(-1) returns "nan" while
it creates a math domain error on my IA32 Debian box ...)
Can you provide us with an example code, where this problem occurs?
Alternatively you can insert a test in the convert method of
pyx.graph.axis.axis.logarithmic and test for negative values ...
André
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