# Questions tagged [numerical-value]

Question relating numerical representations, operations and methods, including approximate results instead of exact symbolic results.

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### Why does this test yield True

I have this test implemented in my code, when I import a numeric matrix, which I thought would be bulletproof, but it's failing in this case: ...
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### Plotting the Full width at half maximum as a function of a parameter

I have this function and I want to plot the FWHM of it as a function of the parameter "a", defined between 0 and 10. It should look like the picture attached. I also put the original equation in case ...
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### Plot numerical solutions for a varying parameter

I would like to solve this equation $\log{\frac{a}{1 - a}} + b (1 - 2 a) = 0$ letting varying the parameter $b$ in $\lbrace 0,1,\ldots,20\rbrace$ and then plot the result. I am trying writing the ...
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### Getting non-real answers when assuming variable is real when trying to numerically find maximum entropy distribution

I'm trying to find the maximum entropy distribution as such: Assuming[Element[l, Reals], NSolve[Sum[Exp[l i] i/Sum[Exp[l j], {j, 0, 100}], {i, 0, 100}] == 50,l]] ...
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### Eigenvectors inside a maniupulate function

I am trying to make a physics application and it requires that the eigenvectors be taken for a 3x3 matrix. It is my intention that Mathematica never have to deal with the matrices symbolically. ...
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### Why does one Monitor expression work while another fails?

I have a (somewhat involved) function f[x?NumericQ, y?NumericQ] and for some reason it behaves differently when given a Table ...
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### Why is 1. x (Times[1.`, x]) not simplified to x?

This is maybe a silly question, but I could not think of any logical reason why it is not simplified automatically. I was working with a big linear equation system with some constrained inequalities ...
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### FindRoot for numerical function and how to search more than one root

I have to find the first few zeros of function for which I have not the analitycal expression. The function is named f in the following code and it is the result of ...
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### Numeric values from transform

How would I create a table of values from a transformation? eg: ...
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### Why is Mathematica not able to calculate more digits [duplicate]

When I want a numerical value with a precision of 50 digits... N[1.15/(1 - E^-0.2)^2, 50] Why is Mathematica not able to provide the desired solution? And I ...