# Jon

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**Content Feed**

Extract rows from a cell array based on keywords

Let say you call your cell array A, then you could do this: % make first column into numerical values rather than strings x = ...

ongeveer 12 uur ago | 0

| accepted

MATLAB/Simulink error

It looks like your problem may be that you have a SISO (single input single output) transfer function block (Gnm) but the input ...

1 dag ago | 0

| accepted

How do I access AppDesigner variables in a function that I write and call?

So I'm understanding that you have written a function and want to call it from within your appdesigner app. You then want this f...

1 dag ago | 1

How can I find the last alpha_k value?

I was just going through your code and made a corrected version. I see now that Torsten has also given you a comment that echos ...

1 dag ago | 0

| accepted

How can I find if edges in a subgraph SG appear inside/belong to a graph G?

You can name the edges in G and then the corresponding edges in the subgraph will have the same names as those in the main graph...

3 dagen ago | 1

| accepted

polynomial regression of a given function

You only solved for the coefficients. If you want to compare the original data and the fit you can do something like this, after...

4 dagen ago | 0

| accepted

Why do I recieve error when doing sinc function

If you want to plot the sinc value for a range of values then you need to pass it a vector of values. So for example: x = lins...

4 dagen ago | 0

Doubt about finding the nearest values between array and a matrix

You are overwriting the value of ID with each pass through your loop, so you only see the value for the last pass. If you want ...

4 dagen ago | 1

How do I solve an ODE of the form y'=ay^3 +by^2 +cy +d?

The ode solvers, e.g. ode45 require a function handle which will evaluate the current value of the derivative given the current ...

4 dagen ago | 0

| accepted

How to select multiple excel files with the uigetfile function?

[file_list,path_name] = uigetfile('*.xlsx','MyDialog','MultiSelect','on'); You were missing the dialog name argument, so it was...

5 dagen ago | 0

How to convert time column into a regular array?

t = seconds(A_time.Time - A_time.Time(1))

7 dagen ago | 0

"Unable to find or open 'Filename.txt'" error in MATLAB 2022a for files from a shared network drive.

Sometimes Windows loses the connection to the mapped drive. Can you still open the folder in Windows File Explorer? Sometimes it...

8 dagen ago | 0

Accessing appdesigner objects properties from a function

First, I'm not sure why you would want to just have a single button pushed callback for multiple buttons. Why not just break th...

9 dagen ago | 0

Question

Is applying a binary operator (+,-,*,/) to char arrays supported by MATLAB or just a "trick"

I recently came across the use of the following way to obtain the individual digits of a binary number as an array of doubles, f...

9 dagen ago | 5 answers | 2

### 5

answersFind the Minimum Combination of Sum

If I understand what you are trying to do, I think this might work for you A = rand(100,1); % define matrix which can be mul...

9 dagen ago | 1

I want to plot graph between partial pressure of ammonia and Length but it has error.

Note that in your assignment for pNH3 the index is n, not n+1 so it only get assigned values up to the max value of n set by th...

10 dagen ago | 0

| accepted

calculate the minimum probability

Say you have three matrices of the same size A,B,C then you can find the minimum as you describe using D = min(min(A,B),C)

10 dagen ago | 0

| accepted

Why doesn't Newton's method calculate the correct temperature

Is there a reason you are using your own solver here rather than the MATLAB fzero (for function of one variable) or fsolve for s...

11 dagen ago | 0

| accepted

Simulation of random walk

It looks like you already "store the j values into the array node_visited. So it looks like you should be doing your summaries...

15 dagen ago | 0

| accepted

Check an entire matrix against each value of another matrix

If I understand what you are looking for, I think this will do it in a very simple way c = intersect(a,b) >> a = [4 3]; b = [...

15 dagen ago | 0

| accepted

How can the points of a scatter plot placed on a new matrix?

Assuming you mean by the first point, second point, etc in the scatter plot their order of appearance from left to right (along ...

15 dagen ago | 0

| accepted

How to find indices in a vector satisfying a condition for a minimum consecutive number of entries

Here's one approach. You could shorten this up a little by combining some of the individual statements into more complicated on...

16 dagen ago | 1

| accepted

Check numbers in a 5x5 array

You can also do this without any loops using MATLAB's intersect function which lists the common elements between two arrays. Hin...

16 dagen ago | 0

Can someone help me writing this equation in matlab, I appreciate,..

Here is an example where I have supplied some arbitrary values for P,N, phi and omega. You can modify with the values you actual...

17 dagen ago | 0

| accepted

Drop Down Button (App Designer) return index of repeated elements

Here's a skeleton of the logic regarding using unique. You will have to adapt details regarding getting the users selection etc....

17 dagen ago | 0

| accepted

Dimensions of arrays being concatenated are not consistent error .

There is a problem with your approach, which is setting the initial condition for the second block (the one that the switch is ...

17 dagen ago | 0

| accepted

how can i negative all value in a matrix except diagonal?

Am = -(A - diag(diag(A))) + diag(diag(A))

18 dagen ago | 1

Algorithm to calculate trajectories from a vector field

The trajectories you are seeking are solutions to a set of ordinary differential equations with initial conditions given by the ...

18 dagen ago | 1

| accepted

how to save some variables created in a loop

You need to provide a vector to collect your values in, so something like this numIterations = 10; % put total iterations here ...

19 dagen ago | 0

Tell the user something is wrong

If I understand your question, I think that you may find that you can use MATLAB's errordlg function can do what you are looking...

19 dagen ago | 0