# All Questions

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### Matrices of Machine- or Arbitrary-Precision Real Numbers Error While Using Arnoldi for Large Sparse Matrix

I'm trying to use the built in Arnoldi method in Mathematica to compute the first 1440 eigenvalues of a large sparse matrix. After importing ...
6 views

### Part specification is longer than object depth

I have a function called BasicEulerModified, that is fine(I think). However, when I run another cell to generate a list of ordered pairs, I get the Error "Part specification is longer than depth of ...
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### Plot Venn Diagram of Boolean Formula with Mathermitca

https://www.wolframalpha.com/input/?i=%28a+and+b+and+c%29+or+%28not+a+and+not+b+and+not+c%29+or+%28not+a+and+b+and+not+c%29+or+%28a+and+not+b+and+not+c%29 How do you plot Venn Diagramm shown in the ...
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### Function arguments are taking way too much RAM

I have to compute a function "func" with 24 arguments. Unfortunately when I apply the arguments the RAM fills up immediately. I even change the swap size of my Linux system to 100 G. I hope somebody ...
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### Clustering or Grouping by list of similar strings

I have gathered some sports data from over 40 different sources. I now need to get all the games to "match up", "grouped", "clustered", or "aligned" so all the information for one game is in one list....
39 views

### Solving an equation approximately

I have a complicated equation in terms of $\omega$ and $\kappa$: ...
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### What is the fastest method to find a local minimum of a polynomial

I have high ranked polynomials for which I need to find local minima. Each polynomial has an increasing rank and only one minimum that is valid for the purpose. So from the lowest ranked polynomials I ...
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### Impulse response function h(t) of Gauss functions as a stimulus and response

From the basics of the signal theory the impulse response function (IRF) can be calculate like (L=Laplace transformation): L[x(t)]= X(s) , L[y(t)]= Y(s) and transfer function H(s)= Y(s)/X(s), then IRF ...
46 views

### plotting using evaluate [closed]

I have some simple equations such as ...