Answered
Create a Slanted Linspace Matrix
If you have the signal processing toolbox, the buffer command will do exactly what you want. If not, something like x = linsp...

3 years ago | 0

Answered
log ticks on Y-axis
set(gca, 'YScale', 'log') Is this what you mean?

3 years ago | 0

| accepted

Answered
error message how to solve !?
The error message is exactly what it says. You defined a function, which is not defined if one of your inputs is a function hand...

3 years ago | 0

Answered
MATLAB isn't working to generate figures
Use hold on and hold off when generating figures. I've not used imshow before, but I'll guess that each time you generate a figu...

3 years ago | 0

Answered
How to add a NaN row at the beginning columns of a table?
for jj = 1:5 A(:,jj) = [NaN([jj 1]); B(1:end-jj)] A(T.id(1:end) ~= [NaN([jj 1]); T.id(1:end-jj)], jj) = NaN; end I h...

3 years ago | 1

| accepted

Answered
signal to noise ratio (SNR)
According to the documentation, "r = snr(x,y) returns the signal-to-noise ratio (SNR) in decibels of a signal, x, by computing ...

3 years ago | 0

| accepted

Answered
How can I get archived documentation for a R2012b release?
As per the other answer, 2012b doesn't have easily accessed documentation. I have found, however, the 2012b release notes in thi...

3 years ago | 0

Answered
How to Integrate ?
Wolfram alpha is useful here to show you what can be done. If you click that link you'll see that I asked it to do which is ...

3 years ago | 0

Answered
Min and max value of many results
Good news! Matlab has built in min and max commands. So it's pretty straightforward to define them and store them in a vector: ...

3 years ago | 1

Question

Is it possible to include LaTeX expressions as text in my code?
I have a piece of code, where some of the variables can have their values chosen by me as and when I want. The values have very ...

3 years ago | 2 answers | 0

2

answers

Answered
What is the difference between matlab download R2020a and R2020b?
Here are the release notes for 2020b. There likely isn't much to change for most people, when I updated from 2020a to 2020b I di...

3 years ago | 0

| accepted

Answered
Index in position 1 is invalid. Array indices must be positive integers or logical values. (Slution of equation of motion with runge kutta 4)
t(1), q(1) and dqdt(1) are all zero. Matlab indexing starts at 1, so when you assign k_11 = y1_2nd(t(i),q(i),dqdt(i)) it trie...

3 years ago | 0

Answered
I want the graph of the function only show the part where x>0
You want xlim. Give it one limit and it can calculate the other, or use xlim(0, length(y)).

3 years ago | 1

Answered
max and min row from an array
The built in min and max commands have the ability to return the index of the largest and smallest values in an array. The docum...

3 years ago | 0

Answered
How to change dot's place in fractional number
Multiply by 100? x1 = 0.25; x2 = x1 * 100; disp(x2) 25

3 years ago | 1

| accepted

Question

How do I find out what specifically is causing the error "Matrix is close to singular or badly scaled" in the sgolay function?
I'm using the sgolay function from the Signal Processing toolbox to calculate some derivatives. The function is inside a loop as...

3 years ago | 1 answer | 0

1

answer

Answered
Plot a graph with linspace
You can't get that exact plot with linspace. I've managed to get it by using t = [0 1 1 2 3]; u = [1 1 0 0 0]; plot(t, u, 'k...

3 years ago | 0

| accepted

Answered
Finding points inbetween the values of my arrays.
If I understand your question, you want the interp1 command. You can choose how many target points to create, so make the lines ...

3 years ago | 0

| accepted

Answered
Curve Fitting for a function with 3 fitting parameters.
Bjorn's method will work. I'm just offering a second option, from the file exchange: https://uk.mathworks.com/matlabcentral/fil...

3 years ago | 0

Answered
How to make a graph of an equation if part of it is an array?
You're right, the right side of line 10 has the same size as r (which itself has the same size as t), and you're trying to assig...

3 years ago | 1

Answered
How to delete last characters of a string
What happens if you replace name = "Motor 315S-4" with name = 'Motor 315S-4' and try name2 = name(1:end-2)? Based off this...

3 years ago | 1

| accepted

Answered
Finding multiple x values in plot for given y
I think you want fsolve. Give it a function handle and an initial starting point, and it'll tell you (approximately) what x give...

3 years ago | 0

Answered
subtract two matrices of sizes [1*5] and [3*5]
Well I typed m = [1 2 3 4 5]; y = [10 11 12 13 14; 9 8 7 6 5; 15 16 17 18 19]; y-m into my matlab command window, and it re...

3 years ago | 1

Answered
Why am I receiving the error "Array indices must be positive integers or logical values."
Line 26: Array indices must be positive integers or logical values. i is used as an index, but it isn't defined until a line lat...

3 years ago | 0

Answered
Undefined function 'mtimes' for input arguments of type 'function_handle'.
Your function fonk takes f as an input. f must be a function handle in order to satisfy the quad requirements. Later, you set h=...

3 years ago | 0

Answered
transform data from hourly to quarter hourly
https://uk.mathworks.com/help/matlab/ref/interp1.html The vector x can be datetime values.

3 years ago | 1

| accepted

Answered
How do I write a sparse matrix in MATLAB
https://uk.mathworks.com/help/matlab/ref/full.html

3 years ago | 2

Answered
How to change x-axis values?
This was the top result when I googled "matlab remove scientific notation axis". From R2015b onwards, ax = gca; ax.XRuler.E...

3 years ago | 0

Answered
The way to integrate a differentiated function(微分した関数を積分する方法)
Well the integral of a derivative is simply the function itself. For example: y(x) = x^2 + x + 5 dy/dx = 2x + 1 integral(dy/d...

3 years ago | 0

Answered
Adding noise to my data set
randn is a uniformly distributed random variable with mean of zero and standard deviation of 1. To get what you want, use vari...

3 years ago | 0

| accepted