# Sergio

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Question

Optimization toolbox installed, but MATLAB says it has been removed

I installed MATLAB ra2024, and before on rb2023 I had Optimization toolbox well working. Nevertheless, when trying to run it in ...

1 month ago | 1 answer | 0

### 1

answerQuestion

Obtaining a scalar value from a vector output

Hi, with the given files, if you run test-modified.m and then enzymeLeastSquares.m, you obtain the necessary inputs for running ...

2 months ago | 1 answer | 0

### 1

answerQuestion

How to use an output from on file as input in another file.

The given file "enzymeGeneral.m" generates a vector. " test-modified.m" generates a Jacobian. How can I use these answers an...

2 months ago | 1 answer | 0

### 1

answerQuestion

Error message "Invalid use of operator"

Hi, when I run "enzymleastsquares.m" I get an odd error "Invalid use of operator" I used originally the normal =, but MATLAB...

2 months ago | 1 answer | 0

### 1

answerQuestion

How do I plot a tent-map?

I have to plot the given function on the unit interval. How can I do that? I didn't find any useful answers on MATLAB to...

2 months ago | 1 answer | 0

### 1

answerQuestion

How to generate a matrix from specific outputs from a MATLAB file?

Hi, the file test_modified.m generates a set of values for "SP" and "grad". How can I extract the calculated grad values which a...

2 months ago | 2 answers | 0

### 2

answersQuestion

"reshape" does not give column vector entries in output

Running test_modified.m we obtain the vector entries for the residuals , as a 1x8 vector. However, with either r = reshape([r...

2 months ago | 0 answers | 0

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answersQuestion

How to extract data from a file, and form a column vector?

Take the four files, and run "test.m" in MATLAB. It generates the relative concentrations of Substrate and product as label "SP...

2 months ago | 2 answers | 0

### 2

answersQuestion

How do I create a new function for a least-square file?

Hi, in the given files, I am aiming to do what has been done in this example shown below: The solution of the least squa...

2 months ago | 0 answers | 0

### 0

answersQuestion

Writing out a system of equations for an enzyme reaction

I have the given file, where the rate of reaction is evaluated and gives F as a function of the concentration of the product P....

3 months ago | 0 answers | 0

### 0

answersQuestion

Viewing a house in MATLAB

Hi, I would like to view the house given in the mat file. When I issue: load husdata.mat patch(walls{1,1},walls{1,2},wall...

3 months ago | 1 answer | 0

### 1

answerQuestion

How to develop "a model" from a given m-file of regression analysis?

With the help of the attached code I need to develop a model for the price variation based on a combined (linear) dependence on ...

3 months ago | 2 answers | 0

### 2

answersQuestion

How can I plot the linear variation?

In this attached file, I plot the car price vs mileage and model (year). in = readtable('FordFocusCMAX.xlsx') %plot the dat...

3 months ago | 1 answer | 0

### 1

answerQuestion

Plotting matrix data without existing x-values.

I have this simple matrix, where the first column indicates the number of males of age 0 to 99 (first row, age 0, second row age...

3 months ago | 1 answer | 0

### 1

answerQuestion

Convert a text file to an m.file?

Hi, I have this text file, which I received as an m.file and was wondering how was it generated? How can I do the same for anot...

3 months ago | 1 answer | 0

### 1

answerQuestion

Converting a workspace file to an m-file

Hi, I have looked through https://se.mathworks.com/help/matlab/workspace.html for some rapid method to save a table -file in the...

3 months ago | 1 answer | 0

### 1

answerQuestion

Curve fitter, how to start?

Hi, I just imported curve fitter to the my MATLAB. I have these coordinates from the xls file , and I wish to import them direct...

3 months ago | 1 answer | 0

### 1

answerQuestion

Generate a logarithmic regression of xlsdata and plot it

I have the given data in the xls file. I tried to convert the Var1 and Var2 to log10 values, and then do a regression with the g...

3 months ago | 1 answer | 0

### 1

answerQuestion

Plotting several plots of respective ranges from an excel file into one single plot

Hello, I have this excel file which contains recordings over several years of the temperature at an airport. When I inspect it ,...

3 months ago | 2 answers | 0

### 2

answersQuestion

Extract a specific range of rows from an excel file using opts = detectImportOptions(filename)

I try to extract rows 191-222 from an excel file, and I use opts = detectImportOptions(filename) However, by inspecting the ...

3 months ago | 1 answer | 0

### 1

answerQuestion

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

Hello, I have an XLS file that I need to extract two columns from, and send them in the Workspace to an own file. I do on the...

3 months ago | 2 answers | 0

### 2

answersQuestion

Converting entries from array to double from an entire column in a matrix for plotting

I have this file which I want to analyse for temeprature fluctuations: D=readtable('tempDataTrollhFlygpl.xlsx', 'NumHeaderLin...

3 months ago | 2 answers | 0

### 2

answersQuestion

Finding the maximal value in a matrix, within a specific column, and show the value in the output.

Hello, I have a matrix that I need to extract the maximal value of column D, which is the 4th column. I use the following co...

3 months ago | 1 answer | 0

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answerQuestion

How can I do a Fourier series expansion of a wave-scan from an EDF file in MATLAB?

Hi, I have an EDF file that I obtained from an organization, and this EDF is showing a set of waves, which can be simplified to ...

3 months ago | 1 answer | 0

### 1

answerQuestion

fopen and fget reading lines from a text

Hi, I try to work with fget and fopen, and I would like to read the first three lines from a text file (attached), and print the...

4 months ago | 1 answer | 0

### 1

answerQuestion

How to find a specific number in a specific column in an excel file and how many times it occurs

Hi, I have been looking around for a solution to this problem, I have an excel file and it contains the number -1100 in the colu...

4 months ago | 1 answer | 0

### 1

answerQuestion

Two graphs in the same plot, why?

Hi, I imported some data from an xls file, and when plotting it , I obtain two graphs in the plot. Only one is necessary. What i...

4 months ago | 2 answers | 0

### 2

answersQuestion

Error message when attempting to plot selected area from a XLSX file: " Specify one or two table subscripts after the table."

Hi, I try to plot a defined area of data in an XLSX file, the area is defined from by the columns C11-C6796 and D11-D6796 So...

4 months ago | 1 answer | 0

### 1

answerQuestion

Problems using plot3

I have an xlsx file I'd like to print information from. I would like to read this data into MATLAB and plot how the price of (t...

4 months ago | 2 answers | 0

### 2

answersQuestion

Import XLSX in MATLAB using input() and xlsread()?

Hi, I am trying to create code for a script file in which Matlab's function input() is used to read the name of an excel file wh...

4 months ago | 1 answer | 0