# Askic V

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**Feeds**

Extracting 2 columns from a excel file and send them to an own matrix file

Hello, I would do something like this to extract the data, and then I would used writematrix like VBBV suggested to write into ...

2 months ago | 0

Hello. I want to calculate the covariance matrix for a parameter vector Q[1x24].

Is this helpful to you? I have used the example from Matlab documentation. load iddata9 z9 Ts = z9.Ts; y = cumsum(z9.y); mo...

2 months ago | 0

Im seeking assistance for Simulink Onramp project - Thermostat task 6

This has already been discussed. https://www.mathworks.com/matlabcentral/answers/uploaded_files/1193683/matlbcommunity.jpg htt...

2 months ago | 1

plot data from .mat file

I would do it like this: load (websave('Fidelity_result.mat', 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/1...

2 months ago | 0

Question

Fixed step solver explanation needed

Hello, I've developed a dedicated MATLAB function to simulate a dynamic response of a system using difference equations. I have...

2 months ago | 1 answer | 0

### 1

answerQuestion

Execute Matlab function in Simulink

Hello to all, I have this Matlab function, i would like to execute in Simulink using "User-Defined->Matlab Function" from the L...

2 months ago | 1 answer | 0

### 1

answerReference to rmoutliers() function

Matlab has very powerful documentation. Please have a look here: https://www.mathworks.com/help/matlab/ref/rmoutliers.html

3 months ago | 0

Question

Create plot with gradient descend vectors for function of 2 variables

Hello, I would like to extend this code to a function of two variables z = x.^2+y.^2. I have the following code for a function...

3 months ago | 1 answer | 0

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answerThe multiplication result by sum() and matrix multiplication are not the same

In addition what Walter and Stephen said, if you have some specific application and you need to compare the floating point numbe...

9 months ago | 0

How to plot discrete array with colors

I would also like to offer my solution. It is not so elegant comparing to @Star Strider, but it can show you how bar can be used...

10 months ago | 0

The sample points must be finite.

Most likely, you're getting the error because you have missing entries in the data. websave("filename.csv","https://www.mathwor...

10 months ago | 0

| accepted

Integration of Numeric Data

I think this small code snippet would be sufficient to give you an idea how to proceed further: clc; clear; % Just for the pu...

10 months ago | 0

State-Space Matrix Closed Loop System C Matrix issue

This is how I would simulate similar system in simulink. First of all this is the simulation in Matlab script: % Transfer func...

11 months ago | 1

Can this equation be solved for x? If yes, how does the solution look? Thank you. Karl.

Things become complicated very easy with high degree polynomials. First, this is an example for qudratic equation: syms a b c ...

11 months ago | 0

| accepted

in FFT analysis , this kind of window appear, i cant find THD of signal, please guide.

I would suggest you to look in the documentation. Matlab has a builtin function called thd.

11 months ago | 0

| accepted

How can I combine two vectors with different lenghts and indexes into one sum.

You obviously have missing values in your table. This is how I would approach to this problem: tau = 0:10:80; mu_tau = mean(ta...

11 months ago | 0

| accepted

Predictors in classification learner app

This is explaind in the Matlab documentation here: https://www.mathworks.com/help/stats/feature-selection-and-feature-transform...

11 months ago | 0

| accepted

How to output a tout from Simulink space to Matlab so that it reads the value to us?

Hi @Krzysztof, when I want to access variables from simulink, plot them etc. I use to Workspace block in simulink and choose Ar...

11 months ago | 0

Unable to perform assignment because the left and right sides have a different number of elements.

Not really sure what you're trying to simulate here. From what I can see in the code, you have created a MIMO system with 4 inp...

11 months ago | 0

| accepted

Beginning and end of the curve isn't linked with points

At the bottom of your script I have added the following code: % Define number of digits numDigits = 10; % Enable data cursor ...

11 months ago | 0

| accepted

fit line to 3D scatterplot

I'm not really sure what you want to achieve here, but if you have X and Y data and want to do a linear fit, then you can constr...

11 months ago | 0

Customise marker and Line Style 2 value same Y axes in stackedplot

Can you try this: s.LineProperties(1).LineStyle = ["none", "-"]% remove the line for first s.LineProperties(1).Marker = ["x","...

11 months ago | 0

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"Error using fscanf"

You're getting this error because the path to your file is not correct. this is where the problem is: lightfile = strcat( dir...

11 months ago | 0

| accepted

Find the corresponding matrix

Is this what you need? A =[14 17 19 2 19 12 11 20 20 12 11 7 18 5 16 6]; B = [1;2;4;5;6;11;12;14;17;19;20]; rA = size(...

11 months ago | 0

| accepted

Using variable legend in for loop

Not really sure what you're trying to achieve, especially because abs(z) is always about 0.5, but regarding the legend, I think ...

11 months ago | 0

List S3 Files and Subdirectories

Well, this small code snippet create a file datastore that include all csv files starting with 'd' or 'D' from the current folde...

11 months ago | 1

Plotting inside structure array

This may not be the most efficient way, but here is how I would do it. I hope some of many gurus here may suggest more efficien...

11 months ago | 0

How do I load a engine data like loading Helidata

For example it is loaded from: C:\Program Files\...\toolbox\signal\signal\helidata.mat and this is installed together with Matl...

11 months ago | 0

how can i found the frequency of the first 10 words in a text?

Please have a look at this example: https://www.mathworks.com/matlabcentral/answers/1965034-how-can-i-do-a-histogram

11 months ago | 0

I have 2 error .Error using interp1>reshapeAndSortXandV (line 445) X and V must be of the same length. Error in interp1 (line 128) [X,V,orig_size_v] = reshapeAndSortXan

Please have a look at the documentation for the information how to use interp1 function correctly: https://www.mathworks.com/he...

11 months ago | 0