Symbolics/ModelingToolkit
How do I know the number of independent variables and their names in an equation or expression?
@variables x u(x)
get_variables(u+x+cos(x)) # [x, y(x)] but I want only x
get_variables(0 ~ x^2 + y - 3) # [x, y(x)]
Open an issue. I don’t think there is a built-in for this.
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