Hello,
Le 15/05/2015 11:59, Krzysztof Lewandowski a écrit :
I'm trying to make arrhenius plot of my data ('ln(S)' vs. '1000/T')
with another x axis with 'T' on the top of the graph, but I have no
idea how to do that. Is it possible to make such plot in scilab?
If the additional axis is linear, you may use drawaxis():
http://help.scilab.org/docs/5.5.2/en_US/drawaxis.html
Otherwise, newaxes() could be necessary:
http://help.scilab.org/docs/5.5.2/en_US/newaxes.html
Even with newaxes, it could be very difficult to match both bottom and
top scales.
To turn this feasible and easy was somewhat the purpose of this report:
http://bugzilla.scilab.org/show_bug.cgi?id=7739
Its (too) implicit aim was to enable plots such that the bottom axis is
in wavelengths L and the top axis is in corresponding wavenumbers n=1/L
or frequencies f=c/L
This kind of plot is very common in physics, but hard and tricky to get
with scilab, at least when keeping the autotick mode.
After the report 7739, i think that the best way to enable such plots
could be to add a callback attribute to the drawaxis object, that would
point to a function F(x) computing its x'(x) values, with x spanning x
data_bounds, and x'(x) tick being drawn at the x position in data scale.
Depending on F(x), a smart x' grid could be quite difficult to draw, in
particular for minor ticks (if any).
Samuel
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