# Walter Roberson

I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location. I am currently caught up to T0099119; if you are waiting on a reply from me for an older issue, please send me a reminder.

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**Content Feed**

Can you use the whos command to identify classes

numeric_classes = {'int8', 'uint8', 'int16', 'uint16', 'int32', 'uint32', 'int64', 'uint64', 'single', 'double'}; num_classes...

ungefär 3 timmar ago | 0

How to create TCP IP Server in MATLAB R2020b without using tcpip command as it states it is not recommended.

tcpserver was introduced in R2021a . You appear to be asking what should have been used in R2020b -- the release before tcpserv...

ungefär 3 timmar ago | 0

plotting this program is causing a problem how to fix it?

[y(4),y(5),y(6)] = meshgrid(-4:0.25:4,-4:0.25:4,-4:0.25:4); You want y(4), y(5), y(6) to each represent a matrix of values. You...

ungefär 4 timmar ago | 0

| accepted

Fit a line and integration

You are asking for normalization. When you do that, coeffvalues are the coefficients for the normalized independent variable, no...

ungefär 4 timmar ago | 0

How to assign column headings to .mat file?

It is not possible to add column headings to a mat file. However you can create a table() object and store it in the mat file...

ungefär 16 timmar ago | 0

Splitting a String in a table once

I can tell from the way that the table displays that the entries are categorical() not character or string(). You would need to ...

ungefär 23 timmar ago | 0

How can I limit the argument in coding the roots of a fraction?

root1 = solve(fp,x)

en dag ago | 0

Extract values from one matrix and with iteration solve the system of linear equations

A = randi([-5 5], 5 ,3) B = randi(9,3, 3) C = A/B plot(C(:,1))

2 dagar ago | 0

Draw vertical lines which have constant interval

time = datetime(original_form,'ConvertFrom','datenum'); plot(time, P); firstmarch = dateshift(time(1), 'start', 'year') ...

2 dagar ago | 0

How to open Tonatiuh output .DAT files in MATLAB?

The file format is described at https://code.google.com/archive/p/tonatiuh/ You might find it useful to use memmapfile to defi...

2 dagar ago | 0

Can anyone please help me with this ?

You have not shown enough code to be certain, but I suspect that your function plot_Re60() is defined as taking two inputs, the ...

2 dagar ago | 0

Optimize cost function to obtain optimal value of the optimization variable.

Create a function that accepts a and b and uses ode45() to run the system to tspan 10. Return the values of y1(end) and y2(end) ...

2 dagar ago | 0

I would like to know how to purchase the "Infineon AURIX™ TC4x - TriBoards" board

According to https://www.infineon.com/cms/en/product/microcontroller/32-bit-tricore-microcontroller/32-bit-tricore-aurix-tc4x/ t...

2 dagar ago | 0

In Simulink, why can the fractional integrator only integrate one-dimensional inputs, but not multidimensional matrix forms of variables? What is the solution

The FOMCON toolbox is a third-party software package that is outside the control of Mathworks. You would need to ask the authors...

2 dagar ago | 0

How to Convert data into Image using Matlab

yeah it has only one values means we have a straight white line in the image. Y=linspace(min(y), max(y) ,resolution); With you...

2 dagar ago | 0

Simulink Support Package for Raspberry Pi Hardware not working on Raspberry Pi 4B 8GB (2022)

It will not exactly be "fun", but if you look at https://github.com/mathworks/Raspbian_OS_Setup you can see a list of packages y...

2 dagar ago | 0

how many nodes is available for the student version

The Student license has a 1000 block limit; see https://www.mathworks.com/matlabcentral/answers/94375-why-does-the-block-limitat...

2 dagar ago | 0

Can someone help me how to code the missing parts? because I don't have enough knowledge to code the needed equations.

On lines 21 and 23 you need to assign IoDR either "Increasing" or "Decreasing". You will need to use your knowledge of mathemati...

2 dagar ago | 0

Error using lsim(Hfinal,Y,t)

y=lsim(Hfinal,Y,t); In that call, Hfinal must be a dynamic system, and Y must be an array with as many rows as there are elemen...

2 dagar ago | 0

If I had the derivative of an equation and had data points how would I plot them

if you have numeric derivative and you want to plot the original curve (to within a constant shift) then use cumtrapz() and plot...

2 dagar ago | 0

Undefined function 'isnan' for input arguments of type 'Nodes2'

if I understand correctly, obj.head is either a class member or else NaN for the case where the queue is empty. In the case w...

2 dagar ago | 0

| accepted

How can I properly enter this function in MATLAB

My *guess* is P = p(a+b).*(3-sqrt(3*a+b).*(a+3*b)) ./ (a+b)

2 dagar ago | 0

How to quickly identify a list of nearby stations?

First, divide the stations into subsets: stations close enough to the North Pole that the smaller distance between degrees of l...

2 dagar ago | 1

What code what should I input in the slope, y tangent and y normal? I am currently stuck and tried some codes but it still has an error as seen in the second photo..

https://www.mathworks.com/matlabcentral/answers/1816015-can-someone-help-how-to-calculate-the-slope-tangent-line-and-normal-line...

3 dagar ago | 0

How can I pivot using if else?

If you [row, col, pv] = find(C,1); then if row is empty then the entire C matrix is 0; otherwise pv would be the pivot value a...

3 dagar ago | 0

| accepted

I want to pass data between two windows of GUI

Something closer to Mainapp: properties (Access = public) force area end % Callbacks that handle component events methods...

3 dagar ago | 0

Can someone help how to calculate the slope, tangent line and normal line? I'm lost on how I should code those three and I don't have much infor from clas how to code these 3.

The equation of a straight line is often stated in the form y = m*x + b You have calculated y0 (the value the equation w...

3 dagar ago | 0

| accepted

Error while executing mpc algorithm in MATLAB

x=[x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12].'; u=[u1 u2 u3 u4].'; Those are column vectors of length 12 and 4. A=sub...

3 dagar ago | 0

| accepted

How to add a particular font to path with toolbox?

See https://www.mathworks.com/matlabcentral/answers/514119-can-i-add-custom-fonts-to-my-matlab-desktop-in-preferences Note that...

3 dagar ago | 0

Find a point operation (in tabular form) that will equalize a 3-bit image with the following histogram.

One possible interpretation is that each level should be associated with a brightness, and that as closely as possible the total...

3 dagar ago | 0