THe project I am currently working on creates statistical models and
provides the linear regression model as an equation.
It has some package centric ways for defining polynomials and other
functions, for instance:
68.1223e-02*VB_POLY(var_to_use,0.79425485,0.0074458634,-3.6000059e-05)
I'm trying to define a function to evaluate these, but am not having much
luck. The linear regression models are put into an .ini file where I read
them out then use
parse_expr to evaluate them with the dictionary containing the data for the
variables:
[model_1]
formula = -10.5296e-01 + 22.1357e-02*tide_hi_8726243 + 68.1223e-02*VB_POLY(
sarasota_bay_nexrad_summary_144,0.79425485,0.0074458634,-3.6000059e-05) +
91.2317e-02*VB_POLY(c10_min_salinity_24,-641.91178,36.505262,-0.51822633)
Python function, the eval function is not correct, I am trying to get a
simple test case to work:
class VB_POLY(Function):
nargs = 4
@classmethod
def eval(cls, var, a, b, c):
print "%s %s %s %s" % (var, a, b, c)
return
Python code to evaulate:
mlr_result = parse_expr(self.formula, self.data_used)
The VB_POLY eval function is never called. I'm sure I am missing something
basic so I'd appreciate any pointers.
Thanks,
Dan
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