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Split data based on column value to write in different sheets in excel
Using accumarray, one line to segment the matrix, then one loop to write the file sheets (and a second loop to verify the result...

2 years ago | 0

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How to make an automated and updated legend for ts step response graph
The Control System Toolbox plots are characteristically difficult to work with. The best option would be: [y,tOut] = step(F...

2 years ago | 0

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How can I replay the results I got with the pspectrum function on the spectrogram function?
You can’t equate the pspectrum and spectrogram function outputs because the units are different. The spectrogram function produ...

2 years ago | 0

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Summing elements in an array between uneven date intervals
I am not certain what you want. If I am readiing the file correctly and converting the dates correctly (both 'excel' and 'posix...

2 years ago | 0

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How performing FRF for complex functions
Try this — s = tf('s'); H = (1257*s + 3.736e05) / (s^2 + (1554 - 2e02i)*s + (3.736e05 - 2e02i)) opts = bodeoptions; opts....

2 years ago | 0

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Simple Vector Indexing Question
Put all the indices inside one set of square brackets — Vector = 1:20; activeVector = Vector([3:7 10:15]) This is a simplifi...

2 years ago | 0

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overlap logical matrices in MATLAB
Use the logical or (|) function to accumulate the matrices — dis_threshold=0.4; a = false(5); ...

2 years ago | 0

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Dificulty plotting graph of function for basic bending moment graph
Use the second argument to fplot to limit the independent variable range — %bending moments calculator syms X %force 1 F1=5...

2 years ago | 0

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Polar Scatter Plot using 3 Data Set
Try this — th = linspace(0,2*pi,20); r = rand(1,20); a=[1:1:20]; sz = 75; % polarscatter(th,r,sz,a,'filled') [x,y,z] ...

2 years ago | 0

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Answered
How can I know which ditribution is appropriate to fit on the generated histogram? and, How can I do that?
I would use the histfit function, then if the fit appears to be acceptable, use the fitdist funciton to estimate the parameters....

2 years ago | 0

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Can MATLAB plot hypergeometric functions?
I do not understand what you need to plot because I do not understand your notation, however the Statistics and Machine Learning...

2 years ago | 0

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Error in FFT calculation
The value for ‘L’ is 7500 and for ‘L1’ is 601. If you change: P21 = abs(Y1/L1); to P21 = abs(Y1/L); you will get the ex...

2 years ago | 1

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Answered
Lorentzian fit for defined peak
First, locate the peaks using findpeaks or islocalmax to get the peak values (amplitudes) and locations. The findpeaks function...

2 years ago | 1

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Answered
Need help on how to CREATE a text file in matlab?
‘Do I use fopen or table function?’ It depends on what you want to do. If you have a numeric array with column text headings, ...

2 years ago | 0

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Loading and Plotting .mat file
If you want to plot the ‘wl’ field in each one, this works — Files = dir('*.mat'); figure tiledlayout(3,3) for k = 1:nume...

2 years ago | 0

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Answered
Why derivatives using matlab symbolic for a simple fuction produces different results?
They both produce the same results when I run your code — syms x y %define function z=x+1i*y; theta = angle(z); Ig1=exp(-t...

2 years ago | 0

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Continuous vs discrete time
It is difficult to follow what you are doing as you describe it. It might be best to use the Control System Toolbox functions i...

2 years ago | 0

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How do I make a 3D surface from table data?
Use the scatteredInterpolant function to generate the ‘Z’ matrix — T1 = readtable('Table Matlab surface.xlsx', 'VariableNaming...

2 years ago | 1

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Answered
Cannot extract real or imag part of a function
You are taking the real and imag parts of a function handle. It is necessary to evaluate the function handle first. Try thi...

2 years ago | 1

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toggle percentual from matrix
Perhaps this — per=5; a=magic(4) apr = a*(1-0.05) % 95% Of The Value apr = a*0.05 ...

2 years ago | 1

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Why I knock into a error when I want to get data from my double?
In ‘PCI1’ you are referencing ‘R’ however you are not passing it to ‘PCI1’ as an argument. Perhaps this — R = [[1 0.9954 0...

2 years ago | 1

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Answered
Unexpected flat surface with surf command
I do not completely understand the problem, however: [X, Y] = meshgrid(sort(x), sort(Dp_values)); could solve the problem. ...

2 years ago | 0

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4 equation 2 solution
Since ‘Phi’ and ‘L3’ are not defined, I created them (and ‘Alpha’) as parameters to be estimated hiere. I am not certain wh...

2 years ago | 0

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Answered
for loop with fminsearch
There is a typographical error: for i=1;100 ↑← HERE Change that to a colon and it works — %I couldnt make array v...

2 years ago | 0

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How do use the annotation function to annotate specific x-values on my graph?
I wrote a couple anonymous functions recently to transform (x,y) coordinates to normalised coordinates for just this purpose. ...

2 years ago | 0

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Can't get symbolic numbers.
The sympref function should work, specifically: sympref('FloatingPointOutput',false); or: sympref('FloatingPointOutput','de...

2 years ago | 1

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Answered
Combining multiple matrices into a single vector
A single vector is not possible, however a 3D array is with the cat function — T1 = [2 3; 4 2]; T2 = [1 7; 9 ...

2 years ago | 0

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Answered
How can I change an entire column of dates into datetime format?
It appears to be UCT (or GMT in 1940). Perhaps this (the 'InputFormat' descriptor must match the format of the string you wan...

2 years ago | 0

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How to stack-up multiple cases in z axis?
clc clear x(1) = 0 ; y(1) = 0 ; zm = NaN(2,200); multiplier = 50 ; figure(1) hold on for i1 = 1:2 multi...

2 years ago | 0

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Answered
How to fill color between two curves?
If you only want the region between the curves before or after they cross, use ‘logical indexing’. Try this — % clc % clea...

2 years ago | 0

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