# Questions tagged [precision-and-accuracy]

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### Floating point problem with plotting huge function

I am trying to plot a complicated function. In the end the plot does not look well and it seems like there is a problem with the precision. Short explanation for the following code: First I do ...
27 views

### Problem with Set Precision [closed]

I am using Set Precision to calculate data point pairs (t,Y) in a table: Table[{t, SetPrecision[test[t], 4]}, {t, 0, 135, 7}], Works fine until I try to copy and paste the list into another list ...
57 views

### Trying to plot a function with alot of precision [closed]

So im basically trying to plot a function of 2 variables and see when its graph is minor than 0, so the problem is this function depends on some other functions i defined and when i calculate values ...
53 views

### Precision in mathematica [closed]

I am having some trouble with mathematica, i need to precise calculations and he is rounding my numbers and taking decimal cases from them and i wanted to know if there's a way i can tell him to stop ...
15 views

### How to dynamically increase sampling rate for NIntegrate?

I am trying to numerically integrate a messy function over the range $(0,\infty)$. Rather than integrating to $\infty$, I programmed a dynamic cutoff for which I can specify a desired precision. For ...
98 views

429 views

### Why does the PoissonDistribution not plot around its mean for moderate large numbers?

I plotted the Poisson Distribution for various mean values (plot label and vertical line). The plots does not peak around the mean as the mean increase. Any advice to get the right plot, or at least ...
76 views

### NDSove vs ParametricNDSolve

ParametricNDSolve is very practical when one has to execute NDSolve again and again. However is it equally accurate? I have not ...
167 views

### NMaximize not always returning solution

This question is related to a previous question and answer here: NMinimize or NMaximize for a dynamic problem but tackles a different problem. I am trying to solve a simple linear quadratic ...
66 views

### Numerical calculation Mathematica 11.2 / 11.3 / 12 [duplicate]

Please I do not understand why Mathematica 11.2 version evaluates numerically the value below Exp[-800]//N (* 3.667874584178*10^-348 *) while 11.3 and 12 ...
101 views

### How to make these operations occur faster?

How can I get this section of the code to solve this integration faster. I have rather large values but I don't need it to be too specific. However if I lower the precision it says the integration is ...