Graph not showing up
Use the axis function to see it: a=9; b=2; c=5; d=5; x=[ a a a b b c]; y=[ b c d c d d]; plot(x,y) axis([0 10 0 6]) ...

14 días ago | 1

How to fit two data sets, y1 and y2, to different functions with shared parameters.
This problems requires lsqcurvefit since the fit is to a matrix and not vector dependent variables: y1 = rand(10,1); ...

14 días ago | 0

Go from Local Time to UTC with respect to the dates I have!
The data in your Excel file need a bit of preprocessing, then the conversion is straightforward: D = readtable('Date-Time.xlsx...

14 días ago | 0

| accepted

Filling with colour the space inside object
Perhaps you can adapt the solution in: fill area between two polar curves to your problem.

14 días ago | 0

| accepted

How to plot multiple curves in the same graph window?
Try this: J=20.48*10e-6; b=0.702; kt=14.70; kb=0.48; R=1.6; L=0.02*0.001; num=kt; den=[(J*L) ((J*R)+(L*b)) ((b*R)+(kb*k...

15 días ago | 0

| accepted

convert date to number
This appears to do what you want: This = '00:01:36.480'; NowThis = datetime(This, 'InputFormat','HH:mm:ss.SSS', 'Format','HHm...

15 días ago | 0

Another approach: txt = fileread('X.txt'); timepos = strfind(txt,'Time:'); endpos = strfind(txt, 'end'); for k = 1:numel(ti...

16 días ago | 0

| accepted

Importing multiple .odt files with specific row and column ranges into Matlab.
If you have R2019a or later, see if the readmatrix function will read it. Then see: Import or Export a Sequence of Files.

16 días ago | 0

Bode plot of the following equation
Perhaps: s=tf('s'); U=(8+22/s+32*s); [m,p,w] = bode(U); figure subplot(2,1,1) plot(w, 20*log10(squeeze(m).^0.2)) yla...

16 días ago | 0

Why fft dosen't conserve energy?
From the fft documentation: Y = fft(X,n) returns the n-point DFT. If no value is specified, Y is the same size as X. If X is ...

16 días ago | 0

| accepted

Create two surfaces given two equations and four unknowns
There ar an infinity of solutions, so the symbolic solution will return no solutions. If you want to experiment with numeric ...

16 días ago | 0

To find the FWHM and area of pulses in a signal waveform
Try this: M = readmatrix('z_data.xlsx'); t = M(:,1); A = M(:,2); As = smoothdata(A, 'movmean',15); ...

17 días ago | 0

| accepted

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.
The problem is that the first element of ‘Xs’: 4501354550746679/8796093022208 == 0 is not a function of ‘F2’, so it returns a...

18 días ago | 1

| accepted

Save an array with multiple rows and columns in .txt file
I would use the writematrix function (R2019a and later). Another option is dlmwrite (and its friends) if you do not have writem...

18 días ago | 1

| accepted

How to autosave matlab ode sover results if power goes
I would create a ‘tspan’ vector using linspace, then in a loop, integrate over a portion of the vector, save the results to a .m...

18 días ago | 0

Can't plot one-column stacked graph
It is only possible to plot two stacked bars. Hiowever, after that, it is possible to turn one of them off. Try this: figu...

19 días ago | 0

| accepted

How to combine two outputs of a into a single vector.
I am not certain what result you want. Try this: L = randi([2,5]); lo = [1,5,10]; hi = [3,8,9]; for k = 1:length(hi) ...

19 días ago | 0

| accepted

Why is this not working
First, it appears that you are trying to solve it inside the functions, and that won’t work. Second, this: F(9) = 0.01*x(6)...

19 días ago | 1

| accepted

How do I find my computer's host id?
In Windows, it is the volume serial number for the C:\ drive. To get it, run this from a script or the MATLAB Command Window:...

19 días ago | 0

Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 0-by-1.
The problem is that vpasolve could not find a solution, so it returned an empty vector. The Symbolic Math Toolbox is good for m...

19 días ago | 0

For loop overwrites values in signal
First, please do not use ‘max’ as a variable name. It is the name of the max function (obviously) and variable names take prece...

19 días ago | 0

| accepted

how to create equation x y z using matlab
If you simply want to plot them: x = [5.252907987, 1.945397314, 1.016, 0.243]; y = [287.4171875, 137.4367188, 80.08359375, 37...

19 días ago | 0

| accepted

how to find the values of x,y, z,t
Try this (after adding the necesary multiplication operators): syms t x y z F = [0.542294 + 1.2144*x + 1.025*y + 0.0666*x^2...

19 días ago | 0

TRANSER FUNCTION OF RC CIRCUIT WITH GIVEN VALUES
I would use a for loop to change the component values and plot them. The instructions say to use the same set of axes (use the ...

19 días ago | 0

Input argument in a function as a string?
It’s a bit more involved than that. The axis labels and the title are Axes Properties, not Line properties, so: ax.XLabel.S...

20 días ago | 0

| accepted

How to convert accelerometer data from excel into frequency
The sampling frequency is too low to detect a 130 Hz vibration: A = readmatrix('DutyCylce82Vals2.csv'); A(:,1) = A(:,1)*1E-3;...

20 días ago | 0

| accepted

Read CSV with row in quotes (string and numbers)
‘I have no idea to read the .CSV file correctly.’ One approach: C = {"7129300520,""20141013T000000"",221900,3,1,1180,5650,"...

20 días ago | 0

| accepted

What factors I need to consider when transferring to new version of Maltab?
The 2020a is pre-release, so you cannot discuss any details of it here. For all the others (including 2020a when it is releas...

20 días ago | 1

Create function handle from function file
Yes! In some instances, that is necessary in order to evaluate the function. Example — function y = f(x) y ...

20 días ago | 0

| accepted