Add new -B axis modifier +e to skip annotation(s) at end of an axis#5873
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Add new -B axis modifier +e to skip annotation(s) at end of an axis#5873
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When composing multible frames or plots, expecially with y-annotations parallel to the axis, it is convenient to be able to skip plotting the annotations that land exactly at the end of an axis (or just one end). This is difficult todo in GMT without changing -R (say -R0/0.9999 instead of -R0/1) but that is not a satisfactory solution. The new axis modifier +e[l|h] will turn off both or just the lower or upper annotation if it lands at the end of the axis. I have added a simple test script to illustrate the effect and ensure it works.
PaulWessel
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Esteban82
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Oct 18, 2021
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When composing multiple frames or plots in a figure, especially when requesting y-annotations parallel to the axis, it is convenient to be able to skip plotting the annotations that land exactly at the end of an axis (or just one end) so they do not stick outside the axis length. This is difficult to do in GMT without messing with -R (say -R0/9.9999 instead of -R0/10) but that is not a satisfactory solution and requires manual edits of scripts which may not work when programming them. In fact, I ran into this in preparing figures for a paper and needed to do this.
The new axis modifier +e[l|u] will turn off both or just the lower or upper annotation if it lands at the end of the axis (the threshold is the same we use for inside annotations, 1e-4 inches). I have added a simple test script to illustrate the effect and ensure it works:
This PR also does some maintenance in using new constants GMT_AXIS_MODIFIERS and GMT_FRAME_MODIFIERS to handle the list of modifiers instead of having the hard-wired in several places which invites future bugs (as we have done for other modifiers).