Answered
F1(u,v)=0,F2(u,v)=0 with 4 parameters a,b,c,d, 3 of which (a,c,d) are given
a = 1.5; c = 0.4; d = 0.9; b=0.1:0.1:9; syms u v F1 = @(u,v,b) u*(1 - u) - b*u*v/(c*u + 1); F2 = @(u,v,b) 0.5*b*u*v/(c*u +...

2 years ago | 0

| accepted

Answered
Unrecognized function or variable 'del'.
That should actually work — tic n = 0; for del=0.0:0.4:pi n=n+1; pe(n)=1.2*sin(del); end toc pe A mnore effi...

2 years ago | 0

Answered
How to make sure that the horizontal axes of two figures align?
If the figures are open at the same time, you can use the linkaxes function. If they are not, you can use xlim one one figure a...

2 years ago | 0

Answered
csv to fft matlab
You cannot calculate the Fourier transfomors without a corresponding sampling frequency or time vector. Assuming the sampling...

2 years ago | 0

Answered
SENSITIVITY ANALYSIS OF A SYSTEM OF AN ODE USING NORMALIZED SENSITIVITY FUNCTION
I am not certain that this does everything you want, however it now has the virtue of running without error — epidemic1 fu...

2 years ago | 0

Answered
what kind of plot is useful for comparing two matrices?
I am not certain that there is any built-in functtion for this sort of problem. One approach — M1 = randn(5) M2 = M1 + ran...

2 years ago | 1

| accepted

Answered
How can I connect the upper endpoint of the red curve to the red dot while keeping the curvature nearly the same?
Here are options using pchip, makima and spline — clear all format long warning off figure set(0,'DefaultAxesFontSize',20...

2 years ago | 0

| accepted

Answered
error in ode45 - function must return a column vector
It would help to have ‘dirfield’ (whatever it is). The other problem is that with one differential equation, ‘y0’ has to have o...

2 years ago | 0

Answered
How to convert displacment data in time series to frequency domain ie (from Amplitude (m) v/s time (s) to Amplitude (m) v/s Frequency (Hz)) using fourier transform
I wrote a utility function to do Fourier transforms. Try this — A1 = readmatrix('ellipse_r3.xlsx') figure plot(A1(:,1),...

2 years ago | 0

Answered
How to interpolate data as stairs
You answered your own question — stairs. Note that you can get the (x,y) coordinates as outputs from the stairs function if you...

2 years ago | 0

Answered
How to remove noise of low frequency signals
Calculate the fft of the green signal (if you do not already know its spectral qualities), then use it to define the cutoff freq...

2 years ago | 0

| accepted

Answered
How to detect the specific area from an oscilloscope signal
Perhaps something like this — jpgs = dir('*.jpg'); csvs = dir('*.csv'); for k = 1:numel(jpgs) figure imshow(imre...

2 years ago | 1

| accepted

Answered
Symbolic expression simplification and shortening
The expression is apparently incomplete. Working with what is provided — syms e e1 e2 h1 h2 h3 A B U = 108*A^2*e^7*e1^3*...

2 years ago | 0

| accepted

Answered
How do I check if there is a function with the same name
The which function can be helpful. which which -all If there are any others in your MATLAB search path, it should display th...

2 years ago | 2

Answered
How to italicize a portion of a plot label while keeping the sans-serif font?
A lot of the LaTeX options do not work in MATLAB because many of the font options are not supported. That aside, use \it to b...

2 years ago | 0

| accepted

Answered
Peak coming at 50Hz in every data file. How to get rid of that
If you have the Signal Processing Toolbox, use the bandstop function: Fs = ...; ...

2 years ago | 0

Answered
how can I find the intersect point of 1 plot and a yline ?
Use interp1 for this — x = [0 10 20 30 40 50 60 70 80 90]; y = [0 0.0328 0.2521 0.7975 1.7295 3.0213 4.5714 6.2283 7.819...

2 years ago | 1

| accepted

Answered
OBTENTION OF AN ABSORBANCE SPECTRA FROM AN IMAGE
Without some sort of calibration, what you want to do might not be possible, especially if the resolution is only integers on th...

2 years ago | 0

Answered
Indexing of cell array and a vector
One approach — index = {[0], [0], [5], [0], [6, 7], [0], [0], [1], [0], [0], [0], [ 3]} ; data = [100, 10, 20, 15, 11, 25, 2...

2 years ago | 0

| accepted

Answered
how to choose windwo size in the EMG signal ?
I am not certain where you read it either, or the rationale for that particular window length calculation. I am not aware of ...

2 years ago | 0

| accepted

Answered
How can I read CDF file?
Without having the file to work with, writing specific code to work with it is not possible. Start with the cdfread function...

2 years ago | 0

| accepted

Answered
How to store users input in a file?
If you want to read the file, try something like this — % name = input('What is your name? ','s'); % age = input('How old are...

2 years ago | 0

Answered
How do I fit a 3rd order polynomial Basis using fitrgp?
From the documentation, using a table as input: Each row of Tbl corresponds to one observation, and each column corresponds to...

2 years ago | 0

| accepted

Answered
Displaying Text on Paper
Without knowing more about this, one option would be to use the axis function to extend the axis limits. Then the text function...

2 years ago | 0

Answered
How to use Matlab to generate a discrete uniformly distributed decimal with a value range of {0, 0.05} and a step size of 0.01?
Perhaps something like this — rv = randi([0 5], 1, 100)/100 figure histogram(rv, 5) grid .

2 years ago | 0

| accepted

Answered
User defined function for curve fitting, but the defined function is complicated
I thought it had something to do with scaling . That would depend on the magnitude of since it might be difficult to fit extre...

2 years ago | 0

| accepted

Answered
Creating ID using year and event number
Try this — load('sample.mat') whos('-file','sample.mat') sample count = cumsum([1; diff(sample.Var1) < 0]); ID = year(...

2 years ago | 0

| accepted

Answered
Smoothing or special techniques to resolve uncertain peaks are required!!
If you want to make it smooth, there are a few options. One of course is to calculate the Fourier transform, choose a suitable ...

2 years ago | 2

| accepted

Answered
How can I import 2D antenna radiation pattern into 2D cartesian coordinates environment?
I am not certain what you want or what your current data are. (I also do not have significant experience with the Antenna Toolb...

2 years ago | 0

| accepted

Answered
Hello, How can I make the output timetable look similar in the photo, so it will 901*1 instead of 901*3
You can do that once, however if you write it and then read it, it will lose the original formatting. To illustrate — Time ...

2 years ago | 0

| accepted