how can I solve this problem
I have no idea what you want, especially with two expressions for ‘sm’ and several variables undefined, so taking a wild guess —...

10 days ago | 1

| accepted

Exponential curve fitting with nonlinearleastsquares methood
Use a different vector for ‘StartPoint’ and then experiment — Xk = [800; 1000; 1490; 2000; 2510]; Yk = [590; 720; 970; 1190...

10 days ago | 0

How to make error bars on double bar graph?
I have no idea when XEndPoints and YEndPoints was introduced, however it was relatively recently (within the last few years). ...

10 days ago | 0

| accepted

Best Text/number location on the plot
One approach is to use the legend position after using the 'Location','best' name-value pair, and then interpolating the relativ...

11 days ago | 0

| accepted

How to customize a colormap?
Another option — cm = colormap(turbo(6)); cm = colormap(flipud(turbo(6))); % Optional cb ...

11 days ago | 0

| accepted

exctract data from 50 curves in .fig
The argument to openfig should be a single .fig file, so supply the appropriate information for ‘filename’ here. Other than t...

11 days ago | 0

Looking for a way to copy an IGOR Pro function in MatLab
You can do something similar with something like this (that I have turned into a funciton) — x = linspace(0, 10*pi, 250); y =...

12 days ago | 1

| accepted

How can I remove harmonics from my spectrogram?
If you know the frequency of the fundamental (that is what I assume you are referring to), use the bandpass function on the time...

12 days ago | 0

How to find the maximum value of C that corresponds to a set of X,Y coordinates?
The spectrogram plot is actually a surf plot with the view set to display it looking from the top, so the ‘Z’ values will give y...

12 days ago | 1

| accepted

How do I convert a specific string to a date ?
Note the Comment by @Stephen23. That aside, try this— DT = datetime('22-07-04T013:09:42Z', 'InputFormat','dd-MM-yy''T''HHH:...

12 days ago | 0

| accepted

Interpolation for x,y,z values
The data in the file do not appear to resemble the data in the image. For those, the fillmissing function (R2016b and later r...

12 days ago | 0

| accepted

Plot 2D surf from 3 columns (X, Y, Data)
Try something like this — Tmag = readtable('FileName', 'VariableNamingRule','preserve'); x = Tmag{:,1}; y = Tmag{:,2}; z = ...

12 days ago | 0

How to extract a value/s from a matrix that match with specific rows
One possibility is to use the findgroups function to select the appropriate rows, then use that to index into the data. type ...

13 days ago | 0

| accepted

Does the initial population matrix have to satisfy constraints genetic algorithm matlab
The initial population matrix does not have to satisfy the constraints. Subsequent generations will, at least in my experienc...

13 days ago | 0

What frequency range does fft compute?
The first element of the output of the fft function is the constant or DC offsets (mean values) of the original time domain vect...

13 days ago | 0

| accepted

Multiply only certain columns in a matrix with a constant
Another approach — M = rand(5,9) % Shorter Version Of 'M' c = 1000; ...

13 days ago | 0

| accepted

Index exceeds the number of array elements. Index must not exceed 0.
A variable with zero elements is empty. The error could be referring to the empty first argument in the function call.

13 days ago | 0

Bode diagram for a Butterworth filter
Use the freqz function — Fs = 60; % Sampling Frequency Fn = Fs/2; ...

13 days ago | 0

Plot ODE45 data in a surface
One option for creating a surface from two vectors is to multiply the transpose of one with the other so that the first vector i...

14 days ago | 0

Not really understanding why cdata isn't working
The ‘cdata’ matrix only exists if you create it. See the heatmap documentation section Create Heatmap from Matrix Data for de...

14 days ago | 0

Select zone of the plot
This can certainly be done, however it is definitely not trivial! Try this — LD = load('Miguel Albuquerque azimuth3.mat'); ...

15 days ago | 0

| accepted

What is Symbolic Math Toolbox and how to get it
For a description, see Symbolic Math Toolbox. Getting it depends on what type of license you have (university, individual, et...

15 days ago | 1

| accepted

Plot electric field in plane

15 days ago | 0

| accepted

Filter data through a bandpass FIR
That’s a problem with FIR filters, simply because in most instances they tend to be very long vectors. Use an IIR filter inst...

15 days ago | 0

How to find inverse of filter such that product of filter and its inverse results in a flat spectrum
The easiest way to find out is to do the experiment — Fs = 1E+5; t = linspace(0, 1E+5, 1E+6)/Fs; fc = [1 2 4]*1E+4; s = sum...

15 days ago | 0

MATLAB fixing dates that are flipped
The first variable is imported as a cell character array, so it has to be changed to a datetime array for the rest of this to wo...

15 days ago | 0

| accepted

It would be easier with your data. Assuming that all the vectors are coiumn vectors — HH = linspace(4, 20).'; LWAC = 10*(1...

16 days ago | 0

How to extract wandering baseline
There are several options, however the one I usually use is first to calculate the Fourier transform of the signal using the fft...

16 days ago | 0

How to set up Paris Law Integral
Since ‘K’ is a funciton of ‘x’ it needs to be created as an anonymous function, and for whatever reason, the integrand ‘fun’ cre...

17 days ago | 1

| accepted