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Questions tagged [infinite-loop]

Questions about looping or recursive structures that do not complete. Such structures include While, For, FixedPoint, and NestWhile. Also user defined functions that make recursive calls to themselves.

1
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1answer
57 views

Looping a function that requires previous calculations in order to continue

I am trying to solve a system of overdetermined linear equations for 2 unknowns with 3 variables. For a given equation of a line, we can write it as: ax + by = c, which expressed in vector form is ...
0
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1answer
51 views

How to make a table for loops?

I have a code given by ...
1
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2answers
107 views
3
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1answer
60 views

Generating trigonometric sums

How can one generate all cosine polynomials with $\pm1$ coefficient of following form: $$\sum_{k=1}^n\pm\cos kt.$$ I tried DO loop but couldn't get all of them as clearly cannot exhaust $2^n$ ...
3
votes
3answers
275 views

Sum of Random Integers

I am trying to get a list of numbers with at least 1000 sums as possible, using random numbers from 1 to 10. But I don't want to get blank list output. How can I only get a list of numbers greater ...
0
votes
1answer
82 views

Combined ParametricNDSolveValue with Do loop?

two weeks ago, I post a question see, and I got its answer, however, I would like to vary the values: g from (0.02 to 0.07), R from (0.1 to 0.3),and k2 from (0.03 to 0.07) by an increment of 0.01 ...
3
votes
3answers
133 views

Infinite While loop

I have an exercise where I need to input a multi-digit number and evaluate the square of the sum of its digits. I am new to Mathematica and I can't figure out why I'm getting an infinite loop. This is ...
0
votes
0answers
88 views

Dynamic loop unexpectedly stops in CDF Player Pro V11.3

Correction The issue described below it is not caused by CDF Player Pro after all. Apologies for the confusion. The Dynamic loop just unexpectedly stops anyways (it just takes longer when run in ...
1
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1answer
76 views

Build a list from a Loop!

I need to build a list with the values of the parameter $\gamma = \mu/a$ and the standard deviation of the following process, ...
5
votes
4answers
315 views

How to populate a table with results from a while function

Does anybody know how to save the intermediate results inside a while function in a table? Here is my code. I would like to save the x,y,counter values in a table in every step that while takes. Thank ...
2
votes
1answer
37 views

NestWhile and infinite loop

Obviously, the following code leads to an infinite loop: ...
1
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1answer
130 views

Why is this an infinite loop? [closed]

The following minimal non working example is an infinite loop: why is it so? list={1}; n=2; While[Last@list<10,Append[list,n];n++] It seems that ...
1
vote
1answer
42 views

Looping and find the minimum of a function and get data in excel sheet

I have written a code. I want to change y from (*10^-4 to 10^-6) and want to find the corresponding minimum and then need to export the value of y and corresponding minimum in an excel sheet. I know ...
2
votes
1answer
22 views

Use of timing system to change input variable in a function

Assume you have some function which is defined by a while loop: sampleFunc[start_] := Module[{i}, While[i = 1; start < 10, i++];] And let's assume I do: ...
2
votes
2answers
203 views

Using a loop to make a vector of functions

I am trying to use a do loop to make a vector of an arbitrary number of functions that can be evaluated later. I think the problem I am having is because of the AppendTo function in my code, because ...
3
votes
1answer
65 views

Setting some Rows and Entries in a Matrix to 0

How can I set certain entries in a matrix to be 0? Given an $m\times n$ matrix with specified values: mat = Table[1/i, {i, n}, {j, m}] I want to make some ...
1
vote
1answer
89 views

For loop Delay Differential Equation [closed]

I need to Solve a delay differential equation with one free parameter, then plot the values of the solution. I am not able to write the code for this. ...
1
vote
1answer
62 views
0
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1answer
37 views

Loops and guesses

I have to solve a system of equations in the following way: I first guess a value for a variable, let's call it y, calculate another variable ...
3
votes
2answers
90 views

How to do calculations in a loop from list of data?

I wrote the code below to do the calculation for each variables. I would like to know how to do this in one loop and to print out timing each time a cycle of calculations is completed. Another ...
5
votes
2answers
858 views

A while loop that terminates after a number of seconds elapsed?

I would like to write something along the lines of: While[(t=Timer[])<60 (*in seconds*), ...do stuff... ] Unfortunately, I'm not aware of a timer object in ...
2
votes
1answer
114 views

Abort when key is pressed

Is it possible to abort a while loop when a key is pressed? Lets say I have this code t=0; While[t<10!,Print[t];t++] Is there a way to stop this loop when I press space? Is there a command like "...
-2
votes
1answer
154 views

For-loop doesn't work [closed]

I need some help. I try to run the code below, but at the end I1 = 0, I2 = 0 (the same as their initial values). I'm not sure which part of my code is wrong. ...
3
votes
6answers
157 views

avoiding writing loops

I have a list a={1,2,3,4,5} I want to calculate absolute differences of each element with all other elements ...
8
votes
2answers
129 views

Recursion depth exceeded in pattern matching with attribute Flat

I am defining a linear associative multiplication operation Mult[]: ...
0
votes
1answer
91 views

Taking derivative using some variable

I have a function with four variable, let's suppose it as f(t,x,y,z). I want to define a For loop in which in each iteration, differentiation operator acts on the f(t,x,y,z) with respect each ...
1
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0answers
102 views

loops in one loop, [closed]

I'm new Mathematica user. I try for loop but it didnt work. I used ...
-4
votes
2answers
104 views

Having trouble looping through arrays

Apologies if this question is written in the incorrect format this is my first time posting here. I am trying to generate a list of vectors whose x, y and z components can be made by selecting an ...
-1
votes
1answer
98 views

Repeating Calculations/Iterations without a specific function

I am trying to repeat an initial condition many times such that I get a desired final output. ONE final output depends on many subsequent calculations from ONE initial condition. But I want to get a ...
0
votes
1answer
206 views

Help With Do While Loops

I understand this question has been asked before but for some reason I can't get it to work also I'm new to stackexchage so I apologize if everything I write is not up to standards. That being ...
0
votes
0answers
39 views

Do loop carrying out recursion not looping - must be a simple mistake!

I have what I think is a basic do loop, but it is not executing as planned. Starting with some setup: ...
0
votes
1answer
542 views

Exporting data file in For loop

I prepared a code in which some numerical data can be produced. I want to export the data in terms of counter of loop but I don't know how I can do it. It my please if someone who knows, helps me. ...
0
votes
1answer
168 views

Do Loop with Solve not working

I am trying to solve bellowing loop but I faced with following error! ...
0
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2answers
98 views

Comparing two matrices in an If block

I want to find out for what value of n MatrixPower[u, n] == IdentityMatrix[3] ...
1
vote
0answers
74 views

Avoiding loops with breakpoints of a Piecewise function

I'm new to mathematica and I'm trying to avoid loops. The setting is the following: I have consumers with preferences (their Betas). Depending on the Beta consumers will have different preferences. ...
1
vote
0answers
67 views

Why is this while loop not giving me any output? [closed]

I have following code in my Mathematica: ...
1
vote
0answers
52 views

Repeatedly applying a function

I have writing a code in order to get pixel values of a image along a line. I want to repeatedly to apply the function to the image to get pixel values along multiple lines. My question is how can ...
0
votes
1answer
73 views

why the result not contain imaginary, I? [closed]

Good day, First of all, sorry if my coding in this forum has mistake. I already learned it and this is the best try from me. May anyone help me troubleshoot my problem below. ...
-4
votes
1answer
66 views

I want to run 5 different simulation cases over an entire Mathematica Workbook?

I want to loop over the case numbers, so run cases 1 -5 without manually changing. caseNumber = 1; Which[caseNumber == 1, dataString = "Jan", caseNumber == 2, dataString = "Feb", caseNumber == 3, ...
1
vote
1answer
99 views

how to use loop function to add column heading and row heading

I have a raw data xsl file without heading column and column heading I want the A,B,C....J to be question 1, question2.....question J and 1,2,3 ....n to be participant 1, participant2, .........
1
vote
1answer
83 views

How to write a loop to run iterations of functions to obtain different values? [closed]

I am trying to iterate the function a, b and td2 (10 times) inside a For loop. This will gives me 10 different values of td2 which eventually gives me 10 different values of fullData2. In another ...
-1
votes
1answer
77 views
-1
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1answer
163 views

Periodic boundary conditions for two walkers

For some reason I'm getting infinite loops most of the time i run this. Perhaps the periodic boundary conditions are wrong. Seems like the probability of the two positions to be the same is extremely ...
0
votes
1answer
74 views

Iterate a large matrix calculation [closed]

I want to repeat the calculation of a pretty big formula about 100 times. I tried using Do loop but it takes sooo much time that mathematica stops working. I will take a simple example to illustrate ...
6
votes
0answers
118 views

Counting automorphisms that preserve a group action

Note: the math, I believe, is not the problem here. The issue is not that I get the wrong answer, just that my code does not terminate. So, if you do not feel comfortable with the problem below, I do ...
1
vote
1answer
206 views

Solve a backward-forward equation with a loop

I want to solve this recursive equation X[t+1] = 0.8 X[t] + 0.04 P[t+1] + 119.6; P[t_] := 0.4 X[t] + 0.8 P[t + 1]; P[t_] := S[t] X[t] - g[t]; and with these ...
3
votes
2answers
245 views

Solving system of equations in Mathematica

I am unable to solve this system of equations in Mathematica. Where the third equation takes value (on the right hand side) from 0.00001 to ...
6
votes
4answers
662 views

Paying off an installment

How do I determine the weekly installment I have to pay, if my loan is, let's say, loan=5000, with interest rate of 2% every ...
2
votes
0answers
80 views

Why does this function recur forever? [closed]

I am trying to solve Project Euler Problem 31, but I don't want answers for that. I just want to know why this function recurs forever. It just keeps subtracting one forever, on the ones where it goes ...
5
votes
1answer
109 views

While loop repeats itself using initialization cell

I am running While loops in an initialization cell for the purpose of submitting the notebook to the online cluster. However it appears to me that the While loop in an initialization cell would run ...