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non-uniform interpolation function
Posted 2017/02/01 7:00 GMT-5 Materials Version 5.2a 3 Replies
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Hi,
recently, I'm trying to change the material properties(electric conductivity); f(x,y,z,t)
however, i only know make interpolation function t,f(t).
but my data is non-uniform distribution.
how can i do it?
summary, not just for t,f(t) but plus x,y,z
best wishes.
recently, I'm trying to change the material properties(electric conductivity); f(x,y,z,t)
however, i only know make interpolation function t,f(t).
but my data is non-uniform distribution.
how can i do it?
summary, not just for t,f(t) but plus x,y,z
best wishes.
3 Replies Last Post 2017/02/02 8:50 GMT-5
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Posted:
9 years ago
Hello Min,
Interpolation functions are documented in the Reference Manual for COMSOL Multiphysics version 5.2a, see page 277 and following. Interpolation functions support up to 3 arguments, but not 4.
You can access all manuals through File > Help > Documentation.
Best,
Jeff
Interpolation functions are documented in the Reference Manual for COMSOL Multiphysics version 5.2a, see page 277 and following. Interpolation functions support up to 3 arguments, but not 4.
You can access all manuals through File > Help > Documentation.
Best,
Jeff
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Posted:
9 years ago
thank you for your help Jeff,
I'm trying to make it with 2-D with time,
However, I got one problem which is
In my data,
x y value(at t0) value(t1) value(t2) and so on
so i used interpolation function in global definition
x y value(t0) = first function(named f1)
x y value(t1) = second function(named f2)
.
.
.
and now I'm trying to make piecewise function with functions(f1,f2,...) as i made above
but it doesn't work saying that it wasn't defined.
Can you tell me what's wrong with it?
summary,
I'm trying to make piecewise function
t0~t1 : f1
t1~t2 : f2
but it doesn't work because f1, f2 weren't defined.
Best wishes.
I'm trying to make it with 2-D with time,
However, I got one problem which is
In my data,
x y value(at t0) value(t1) value(t2) and so on
so i used interpolation function in global definition
x y value(t0) = first function(named f1)
x y value(t1) = second function(named f2)
.
.
.
and now I'm trying to make piecewise function with functions(f1,f2,...) as i made above
but it doesn't work saying that it wasn't defined.
Can you tell me what's wrong with it?
summary,
I'm trying to make piecewise function
t0~t1 : f1
t1~t2 : f2
but it doesn't work because f1, f2 weren't defined.
Best wishes.
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Posted:
9 years ago
I would recommend handling this as a function of 3 arguments, but I suspect I do not understand some fundamental reason you may have for staying away from that simpler approach. For further discussion, I invite you to contact COMSOL's technical support team at www.comsol.com/support/ .
Best,
Jeff
Best,
Jeff