# Rik

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

**Statistics**

RANK**24**

of 265,298

REPUTATION**8,563**

CONTRIBUTIONS

**12** Questions

**2,936** Answers

ANSWER ACCEPTANCE **
33.33%
**

VOTES RECEIVED**1,200**

RANK**1,952** of 18,130

REPUTATION**868**

AVERAGE RATING**4.80**

CONTRIBUTIONS**28** Files

DOWNLOADS **134**

ALL TIME DOWNLOADS**5915**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

Solved

Matlab Basics - Rounding III

Write a script to round a large number to the nearest 10,000 e.g. x = 12,358,466,243 --> y = 12,358,470,000

22 hours ago

Solved

Matlab Basics - Rounding II

Write a script to round a variable x to 3 decimal places: e.g. x = 2.3456 --> y = 2.346

22 hours ago

Solved

Check that number is whole number

Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. http://en.wikipedia.org/wiki/Whole_numb...

22 hours ago

Solved

MATLAB Basic: rounding IV

Do rounding towards plus infinity. Example: -8.8, answer -8 +8.1 answer 9 +8.50 answer 9

22 hours ago

Solved

MATLAB Basic: rounding III

Do rounding towards minus infinity. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 8

22 hours ago

Solved

MATLAB Basic: rounding II

Do rounding nearest integer. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 9

22 hours ago

Solved

MATLAB Basic: rounding

Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

22 hours ago

Find the nearest two values in all grid cells to a specified value across a 3D matrix

Why squeeze the indices? Just use them to index (for which you need sub2ind). As for the second closest: the easiest way is to ...

5 days ago | 0

| accepted

Calling the error function does not print the line number in r2022b

I personally use my own customized versions of error and warning. They take an options struct as the first argument to determine...

5 days ago | 0

Pseudorandom character matrix generation

If you want a 10x10 char array, you can also use indexing: source = 'bdpq'; Array = source(randi(end,[10 10]))

5 days ago | 0

| accepted

If not with a xlsx file

You should have used isempty in your current code: if ~isempty(app.filename) For the test you now want to do, you should extra...

6 days ago | 0

| accepted

Saving file causes glitch

As a temporary workaround you can use this: edit my_script.m % should give you a popup asking if you want to create the file O...

6 days ago | 0

Fitting data from file

You can specify those parameters, but what is much more effective is providing good initial guesses (and not mixing up x and y):...

7 days ago | 1

| accepted

get alpha (color) value of a line

I have no clue why this is hidden, but converting the object to a struct and hunting for a few appropriate candidates I found th...

7 days ago | 1

| accepted

Appending mixed types to strings seems a bit tricky. Is this the intended behaviour?

It helps to do this step by step, which show that (while unintuitive), this is intended behavior. Matlab evaluates code from le...

7 days ago | 3

| accepted

How to assign matrices to an array in a for loop

You can use a cell array: for i = 1:5 matrices{i} = [i*1 i*2 i*3; i*4 i*5 i*6; i*7 i*8 i*9]; end

7 days ago | 1

| accepted

APP Designer code convert to CPP code

Do you need to generate the C++ code, or is it also fine to end up a stand-alone executable? As the message indicates, UIFigure...

12 days ago | 0

Difference between "||" and "&&" in my loop

The or operator means and/or, just like it does in mathematics. You can use the xor function (although no operator or short-circ...

12 days ago | 0

How to reduce the file size of a saved histogram figure

You have two options that I'm aware of: # Change the underlying data so you reproduce the same bins with fewer data points. ...

14 days ago | 1

Computational cost of the commanda 'path'

Once you are at the stage where the profiler makes any sense at all, you should question why you are still using scripts instead...

14 days ago | 0

| accepted

Change exp from number to e

Your own suggestion actually works (although it requires a call to simplify): syms c1 c2 y(x) f(x) e y(x) = (e^2/(e^2+1))*e^(-...

15 days ago | 0

| accepted

confusion matrix with string greek letters like alpha and beta

If you use the actual greek letters, that should work (as long as the function supports all implemented characters): text(1,1,c...

18 days ago | 0

Submitted

ifversion

Determine if the current version satisfies a version restriction

18 days ago | 2 downloads |

reading files that contain changing parts and parts that need to be ignored

You need to use dir to find the actual file name matching some pattern. Then you can provide the function with the real file nam...

18 days ago | 0

| accepted

negative positive sign matrix B need to follow matrix A

The sign function seems an obvious choice: A=[ -1 3 -2 4 6]; B=[2.1 2.2 4.2 4.5 5.8]; C=sign(A).*B sum(C)

19 days ago | 2

| accepted

How to generate repeatable random multiple vectors with Specific Number of Values and Fixed Sum?

You should try to restructure your problem to make it fit the tools you already have. If we figure out a way to generate an ord...

19 days ago | 0

| accepted

Rotate an image around centroid without deformation

I'm not a fan of using i as a variable name, nor do I like shadowing the image primitive with a variable. Other than that, read...

19 days ago | 1

| accepted

How to format wkt (well known text string) as a normal string to build a webread input?

I suspect you need to apply percent encoding, as URLs are not allowed to contain spaces.

20 days ago | 0

How to generate random Patient ID numbers?

The save function has two modes: saving variables and saving a struct. The easiest way to solve this error is to store the da...

20 days ago | 1

| accepted

how to minus a sequence value

The diff function will do what you want. You can use abs to get the absolute value.

21 days ago | 0

| accepted