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Data Science Mathematics Wolfram Language Modeling

Unexpected results from Interpolation function?

Posted 2 years ago

Hello, I'm a new user of Wolfram Mathematica, I don't understand why the "interpolation" function is producing different results given the code below?

POSTED BY: Joseph Mbayi

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Posted 2 years ago

Every time you call `RandomReal` it generates new values by default. If you need the same sample for both `Inputnoise` and `i2` you can store the `Table` in a variable and then use it repeatedly.

POSTED BY: Gianluca Gorni

Posted 2 years ago

Apart from Gianluca's explanation, this expression cannot be evaluated i2 = Interpolation[ Table[RandomReal[NormalDistribution[1, Sqrt[w]]], 3noisefreq]][(3noisefreq - 1) t/3 + 1] `Interpolation` returns a function that takes a numerical value within its domain, and this is not a numerical value (3*noisefreq - 1) t/3 + 1

POSTED BY: Rohit Namjoshi

Posted 2 years ago

Thanks, I totally overlooked that @Gianluca Gorni

POSTED BY: Joseph Mbayi

Posted 2 years ago

The symbolic variable {t} will be substituted for numeric value by other functions such as plot or Table, but thanks, I resolved the issue @Rohit Namjoshi

POSTED BY: Joseph Mbayi

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