[reportlab-users] Controlling exact position of xValueAxis for LinePlot

Luke Murphy lukewm at riseup.net
Sun Oct 8 11:11:11 EDT 2017

Thanks Robin, things are moving along now!

On  0, Robin Becker <robin at reportlab.com> wrote:
>Hi Luke,
>> However, I am having trouble finding out how to control the position of
>> the X axis labels. If I have a plot with 2 values, the X axis is always
>> present at the rightmost position - meaning, it always fills the entire
>> length of the plot. How do I control the X axis to only draw some part
>> of the righ-to-left length of the plot.
>we don't have any way to split a plot horizontally if that's what you
>are trying to do. If you are trying to draw the plot in several ranges
>then that should work provided you split the data into several xranges
>(which I presume are times/dates).
>There are several issues in this case.
>1) Do you want to plot all the data on the same y-axis range.
>2) should the x values have gaps or should the split x-axis be continuous.
>1) is relatively easy. If you want one vertical range then plot all
>the data in a dummy mode and obtain the vertical max and min your
>parameter setup is choosing. You can then apply that to each of the
>split plots using the yaxis valueMin/Max attributes.
>2) is also relatively easy if you just fix up the  data series in
>whatever ranges you choose. You will then have to set the x-ticks your
>self. Again a single plot mode may be your way out if you plot it
>large enough the single dummy plot will have ticks computed for all of
>its range. If you split those into the appropriate ranges as for your
>data then the NormalDateXValueAxis at least should allow specifying
>exact ticks using the specifiedTickDates attribute.
>If the above seems reasonable then by all means ask if there are bits
>of such a strategy that are puzzling.
>Robin Becker

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