Community Profile # Thiago Henrique Gomes Lobato

Last seen: 5 Monate ago Active since 2019

#### Statistics

• • • • • #### Content Feed

View by

Graph works fine for 1 value, I am trying to graph 3 values on the same plot
Each N changes the data of the plot, so you need to make it in an outer loop w = .5; %% 2w=1 x = -.5:0.1:.5; %...

6 Monate ago | 0

find array dispersed within another array
You could trace the first array on the second backwards: A = [ 1 2 3 4 5 1]; B = [ 1 0 2 0 2 3 4 0 5 1]; positions = zeros(...

6 Monate ago | 0

How to fit data with custom function with two variables?
You can minimize the error of your model to the data you want by optimizing the parameters. One alternative for it is, for examp...

6 Monate ago | 0

Help determining velocity of Bubbles
The main workflow that you gave is right and one of the names this process is known is optical flow. Matlab has some functions t...

6 Monate ago | 1

| accepted

Plotting points of intersection using Newton Raphson
Your last line use fixed values, so it will only work for one case. Additionally there was an error in the order of the variable...

6 Monate ago | 0

| accepted

How to take average of lines in Plot & Plot it as one graph?
Do you have access to the data of all those graphs as a matrix? If so you can do it in a very straight forward way: data = rand...

6 Monate ago | 0

How to convert from plot3 to surf?
You have scattered 3d points, surf is made for rectangular grid data. An alternative is to use a function specifically for scatt...

6 Monate ago | 1

| accepted

How to get range of values from a plot?
The difference between gradient and diff is that the first calculates central differences and the second forward differences, bo...

6 Monate ago | 0

| accepted

I can't find the mistake in the code
You can't use "abs" since the coefficients/x values can be negative.

etwa ein Jahr ago | 0

Average of 2 sets of random numbers
Take a look at the binomial generator, it does what you want to.

etwa ein Jahr ago | 1

Add each row of a matrix consecutively to all the rows of other matrix where both have equal number of columns
You can avoid the loop by using repeated indexing: IndexesA = 1:size(A,1); IndexesA = sort( [IndexesA,IndexesA] ); % IndexesA=...

etwa ein Jahr ago | 0

| accepted

Finding 5th to 15th central moment
The std function has a bias correction which the kurtosis doesn't, if you remove it you get the same result: rng(31415) A = ...

etwa ein Jahr ago | 2

| accepted

Extracting numeric values from symbolic variables
x==c The "==" operator is normally used as a logic comparison operation, not an assignment. In the case of using symbolic varia...

etwa ein Jahr ago | 0

| accepted

How to extract detail data from matlab Plot?
If you plot only 118 points you can't get more from the plot. The results are interpolated and probably what you want is a conti...

etwa ein Jahr ago | 0

| accepted

False Output from find-function?
max(A) is a vector, not a number: max(A) ans = Columns 1 through 15 1.0000 1.0000 1.0000 1.0000 1.0000...

etwa ein Jahr ago | 1

| accepted

How can I write a Matlab code on Digital Signals Processing ?
This should work for you, the code is almost self explanatory: L = 1024; Periods = 4; M = 128; A = 1; figure,plot( squareWa...

etwa ein Jahr ago | 0

| accepted

Curve to fit a loglog graph and its equation
There are some issues with your fit. First, log(0) is not defined, so what you expect to become from a fit that uses log(0)? If ...

etwa ein Jahr ago | 0

How wide range do optimalisation algorithms cover?
All of them except fmincon are unconstrained optimization algorithms, which means they can have any possible value in the group ...

etwa ein Jahr ago | 0

| accepted

In intlinprog how can I put condition for x = 1 or 0
You use a lower and upper bound of 0 and 1, respectively. Then if your number is an integer and should be between 0 and 1, the o...

etwa ein Jahr ago | 0

| accepted

How to display matlab plots in a GUI in python using api engine?
I don't think any python GUI has a canvas which can handle matlab plots directly. What you can do is to save your matlab plot as...

etwa ein Jahr ago | 0

Matlab App designer 20190a
A push button cannot "stay pushed", as soon as you click it the callback is called and then the state is reset. If what you mean...

etwa ein Jahr ago | 0

| accepted

How to give conditions on transformations of variables in cvx?
As far as I know the Cvx library doesn't accepts fft/ifft. What you can do is to calculate the ifft by "brute force" in a way th...

etwa ein Jahr ago | 0

retrieve phase information using 'pspectrum'
Why you need the phase? The pspectrum function calculates the power spectrum, which depends on the absolute square of the fft, s...

etwa ein Jahr ago | 0

Finding the probability of a given x-value on a histogram
If your dataset has discrete values, you don't need to get the histogram, rather just count how many times the median appear and...

etwa ein Jahr ago | 0

| accepted

Make a standalone app
It can be both. With appdesigner you can either create an matlab app (that will run in any other matlab), a web application or a...

etwa ein Jahr ago | 1

| accepted

regression analysis of lagged days
Your first argument should be a matrix with all the variables you need for prediction. So, in your case, you need to form a matr...

mehr als ein Jahr ago | 0

| accepted

implementation of a matrix
This should do: rng(42) n = 3; x = rand(n,1); A = ones(n,n+1); Differences = x-x'; for idx=2:n+1 A(:,idx) = A(:,idx-1)...

mehr als ein Jahr ago | 0

| accepted

How to calculate steady state with fsolve with white noise in equations ?
That depends on how you define Steady state. If your derivatives are never actually zero, you will never have a fully perfect st...

mehr als ein Jahr ago | 1

Support Vector Machine: Linear or Non-linear
SVM is always linear in the parameters, but using non-linear kernels allows it to consider non-linear relations between the data...

mehr als ein Jahr ago | 0

| accepted