15 questions linked to/from _?NumericQ equivalent for lists
132k views

### What are the most common pitfalls awaiting new users?

As you may already know, Mathematica is a wonderful piece of software. However, it has a few characteristics that tend to confuse new (and sometimes not-so-new) users. That can be clearly seen from ...
4k views

### Implement the Bisection algorithm elegantly and easily

Description: Rencently, I have finished my course Numerical Analysis, so I'd like to implement many algorithm that I have learned from that course.By this practice, I hope that I can improve my ...
• 625
1k views

### How to draw a hanging rootogram in Mathematica?

I am trying to plot a hanging rootogram of some data in Mathematica. I can't seem to find a built in function for it, while simply using Histogram (on "transformed" ...
• 91
5k views

### Efficient way to test if all the elements in a list are Integers? [closed]

Consider a list such as s = {1, 2, 3, 3, 5, 6, 3} With IntegerQ[number] , you know if ...
• 3,261
244 views

### Selecting all the elements of different length that contain only numbers

If I have a list of lists with different lengths: {{1, 2, 3}, {1}, {1, 2, 3, 4}, {x}, {1, x}, {2}, {2, 3}} How can I extract all the sub-lists with no symbols: <...
• 1,734
2k views

### NIntegrate receiving a function with NumericQ which returns a list

Can some one please explain why ...
• 586
219 views

### Sequence and boolean And

I'm trying to figure out if a calculation result it's a valid result. As it return a matrix, I need to test that every element it's a number, so I thought this could work... ...
• 451
686 views

### Pattern test for variables during function definition

I am having a problem with pattern testing on variables during function definition ...
• 14.8k
1k views

### FindMinimum, NMinimize, etc. with external process [duplicate]

I was hoping to be able to use MMA's minimization power to work with an external process. I want to minimize the function 'TryThisNumber[x_]' which sends the value of x to something external and gets ...
• 1,421
1 vote
1k views

### What is the correct way to use NIntegrate inside the FindMinimum function?

I'm having minor issues with the FindMinimum function when using NIntegrate inside. The functions work perfectly well but I get ...
• 1,035
355 views

### Can I make NumericQ Listable? Why isn't there an Option to test in ListQ?

I have a function which takes lists as arguments. But it shall be evaluated only, if the elements in the lists are all numeric. Otherwise I want the function to remain unevaluated. There is a ...
• 2,828
377 views

### How to solve nonlinear equations involving integrals

Sorry, if this is a duplicate, I was not able to find a corresponding answer. The only question related to mine, as far as I can see it, is this one: How to solve algebra equations containing ...
• 5,503
457 views

### How to properly apply NumericQ or s.th. similar here? - NDSolve inside NMaximize

I wrote a function that numerically solves a given Schrodinger equation and returns replacement rules to obtain the time evolution operator. It looks and is used as follows: ...
• 2,702
1 vote
199 views

### NIntegrate fails because of symbolic evaluation [closed]

The following function can be plotted without any issues, say with ContourPlot, but NIntegrate fails because it tries to ...
• 509
1 vote