Questions tagged [procedural-programming]
Questions about Mathematica's procedural programming paradigm.
158
questions
1
vote
1answer
51 views
3
votes
2answers
78 views
Extract outputs from a WHILE loop in a table format
How can I convert my multiple outputs of a while loop in a table form and save it for later use. Here is a sample code:
...
1
vote
1answer
79 views
How is the best way to integrate using loops
I'm using Mathematica, and I want to integrate a function f[wr] in wr using some method that works with a Table/Do/For in the variable wr.
I tried to use something like the Riemann's sum, to evaluate ...
1
vote
2answers
80 views
How can I plot these straight lines in a picture?
How can I plot these straight lines in a picture?
...
5
votes
7answers
274 views
How to use AppendTo in a While loop? [closed]
I am trying to code a while loop that uses AppendTo to append the loop variable to an empty list.
...
2
votes
3answers
69 views
Changing iteration variable in Do loop
I want to generate random positive hermitian matrices, I start with such a code
...
0
votes
0answers
30 views
Optimization of Do loop with multiple variables
I am pretty new to Mathematica and I would like to optimize a Do loop with multiple variables that I have.
I have three lists of three elements each, with the condition that the first element must ...
0
votes
1answer
55 views
Why do I not see any results from my For-loop? [closed]
I am sure I am missing something trivial :-( Still any help is welcome.
...
2
votes
1answer
70 views
Numerical Fredholm integration using loop
I have a code line having two Do loops, one within other. In certain situation arising within inner loop, I want the outer Do ...
1
vote
0answers
71 views
For- loop which can reuse updated values [closed]
Eout = E^x ;
For[kz = 1, kz < 4, kz++,
Print[Eout1[kz] = Eout];
Print[kz]]
The output is
E^x
1
E^x
2
E^x
3
But what ...
2
votes
1answer
31 views
how to run a specific cell in a notebook from another notebook
I have a long Mathematica code in a notebook, denoted by NB1. Since it is a very long code, and I need only some of the outputs from NB1 to be used in another ...
0
votes
0answers
50 views
What techniques have you employed to avoid loop in Mathematica? [duplicate]
It appears to me that loop in mathematica is very slow (compared with matlab). Since many people still use mathematica to finish their work, there must be some techniques to bypass this problem.
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1
vote
1answer
62 views
For loop for two variable at the same time
Can I use for loop for two variables as example show below at the same time?
for (int x = 0, y = 0; x < 10 && y < 10; x++, y++)
0
votes
0answers
40 views
Running a complex notebook from a different master notebook?
I am trying to use the Dynamo notebook (https://www.ssc.wisc.edu/~whs/dynamo/dynamo_3S_v1.4.1.nb) in a loop over parameters. Basically, this software takes one matrix as input, solves ODEs and some ...
0
votes
0answers
48 views
Iterative loop with many steps
I want to automate the following code, let me begin by explaining the code first. This code, for representation, is divided into 3 parts. The first is:
...
0
votes
0answers
37 views
The variable in the While loop does not change
I have a simple while loop. After running, the variable does not change:
...
0
votes
1answer
51 views
Return last value of While function
I want to make a function that performs a multiplication with Inner i number of times using a ...
0
votes
1answer
54 views
Variable nesting depth inside table
I hope my title makes sense. The idea is the make a function in which a set of variables, $l_1$, $l_2$, etc. are accessible inside the innermost body of a nested (/folded) function. Each of these ...
0
votes
0answers
43 views
How can I count the number of days (Monday, Tues, etc) in a year?
I am new to Mathematica and for fun am trying some of the challenges. The one I am working on now is:
...
0
votes
2answers
99 views
0
votes
1answer
53 views
Parallelizing nested for loops
I'm currently computing nested for loops.
I count up a few counting variables and compute a value for each set of counting variables, then that value is added to an array. It is a way of adding up ...
2
votes
3answers
129 views
Evaluating number of iteration with a certain map with While
Beeing used to programming in C-like languages I am struggling with iterations and loops with mathematica. I am trying not to use the For command, as already lots of people recommended.
I am trying ...
1
vote
1answer
100 views
How do I create multiple plots from an Excel spreadsheet?
I have imported an Excel spreadsheet with dimensions {row, col}= {92, 28} into Mathematica, I want to plot 27 datasets from the spreadsheet: column 1 with column 2, column 1 with column 3, ..., column ...
0
votes
1answer
137 views
Mathematica crash every time when I run this loop [closed]
I have written a simulation for a percolation test. Then, I am using another notebook to control this simulation to generate 1000 results with a different random seed for each one of them.
The ...
2
votes
1answer
63 views
Populating function inputs from lists [closed]
I have several lists containing variables, e.g. list1={x1,x2,x3}, list2={y1,y2,y3}, etc. I would like to define a function in those variables, i.e. ...
0
votes
0answers
27 views
Running a test over a list to alter list
I'm quite new to this. I have a nested list that represent solutions to an equation. I would like to create a new list that only contains one 'representative' of each element. As an example, imagine I ...
3
votes
2answers
102 views
Overloading a function to pass in an expression rather that the name of a function
This is an example of procedural programming borrowed from Paul Wellin's book. It's a simple implementation of the Newton-Rhapson method.
I overloaded the findRoot ...
0
votes
2answers
44 views
Running a loop to check for multiple congruences
I have the code for a loop to run. Right now it can check if a number is a square and at the same time check if it is congruent 0 mod 47. My questions is, how can I alter the code to see if it is ...
2
votes
1answer
33 views
Loop with indexed function not defined for some index values [duplicate]
If anyone cares, this is supposed to be a very simple implementation of a Metropolis algorithm for a uniform distribution. I want to plot the variance of the sampled values as a function of an ...
0
votes
2answers
80 views
List defined in Do not remembered outside Do
Apologies if this is a trivial question. It comes from an overall problem I am having with Mathematica. Specifically, within a Do I generated the elements of a (...
0
votes
1answer
50 views
Using elements of list to solve a differential equation
I have created a list as shown in picture.
the digits inside f are values of a and q respectively.
I want to solve the Mathieu equation.....
1
vote
3answers
64 views
How do I repeat the number of times a nested for loop does an iteration?
I am trying to write a nested for loop that prints the pairs 00 through 55, with each digit running from 0 to 5.
In other words, I want the output to appear as so: 00, 01, 02, 03, 04, 05, 10, 11, ......
0
votes
1answer
56 views
1
vote
1answer
94 views
Why are there local variable conflicts in my recursive function definition?
Sorry to post a long piece of code. There are two places in here where I Print[] 'path2' when the count == 984, because for some reason, that list is getting ...
2
votes
1answer
47 views
Looping from a Set of Undetermined Size [closed]
For a problem I am working on, I need to create sets all the prime factors of a large set of integers (at least on the order of 1$-$1,000,000 but more on the order of all integers 1 to $10^{12}$). ...
1
vote
1answer
60 views
Nested Do loops with externally defined iterators [closed]
I want to be able to define a set of iterators for nested Do loops, such as
...
2
votes
2answers
74 views
What is wrong with my procedural function to find all prime $\leq x$? [closed]
I want to create a simple function that prints all prime numbers from 1 to x. I have the following code, which doesn't cause any errors from the kernel but it doesn't return anything:
...
3
votes
1answer
137 views
Is there any way that convert entire mathematica code to java or python?
I am novice to Mathematica. I want to convert Mathematica code from my textbook to Java or Python to trace coding.
0
votes
1answer
29 views
Problem faced using user-defined mod function in loop
I want to make a program which tell whether a number perfect or not.So i tried like that:
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0
votes
1answer
25 views
Looping Constructs to create a set of varibale matrices
I am trying to create an $ n \times n $ matrix, which has cosine terms. I would like to select the values of the arguments of cosine terms from a random set of values that I have generated. My code ...
0
votes
1answer
234 views
Solve a system by Cramer's rule using loop
Consider the linear system AX=B,where A={{3, 0, 2}, {-3, 2, 2}, {2, -3, 3}},B={{3}, {-1}, {4}} and x=...
0
votes
1answer
100 views
How to use a test function correctly to terminate a While loop?
I define a test function in order to stop my While loop:
...
0
votes
1answer
131 views
2
votes
4answers
162 views
How to generate repetitive graphs?
I need to create several graph for different values of a parameter $h$.
The code is the following
...
3
votes
3answers
187 views
Improving performance of algorithm to compute Code puzzles
I hope to explore Mathematica by using it for Advent of Code puzzles this year, so spoiler alert for anyone interested in solving https://adventofcode.com/2018/day/1 for themselves.
Part 2 of ...
1
vote
1answer
158 views
While loop (or alternative) to generate list of random submatrices satisfying condition
I'm trying to generate a list of random submatrices with matrix norm 0.1, however I'm getting stuck; currently my code looks like this, where I run over a while loop.
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0
votes
1answer
42 views
How could I iterate the following equations?
It's my first time to use mathematica, and I hope to iterate the following equations.
Ci0=-Ci-1,0 ((i-1+q)p a-p q c)/((i+q) p-p q)
C0j=-C0,j-1 ((q p b-(j-1+p) q d)/((q p-(j+p) q)
Cij=-(Ci-1,j ((...
9
votes
2answers
156 views
Problem with Excel operation in NETLink way
I'm using the NETLink package to build a Excel file and trying to fill it with some data as this:
...
5
votes
1answer
459 views
An efficient way to translate a triple for-loop from Matlab to Mathematica
This is my first post on StackExchange, so if I violate any etiquettes, I apologize in advance. I am a senior engineering student who has been using Mathematica for a year now. For one of my classes, ...
0
votes
2answers
44 views
Expressing values from an evaluated If function as a list
For[i = 0, i < 4, i++, Print[i]]
gives the result:
0
1
2
3
by the definition of the If[] function. Given a much longer ...
